programme book - Magister Program in Geothermal Technology

Welcome Remarks
About ITB International Geothermal Workshop
Background and Objectives
Organizing and Technical Committee
Workshop Venue Map
ITB Campus Map
Room Layout
Programme at A Glance
Pre-Workshop Course 1 (ITC Faculty – Twente University - ITB)
Pre-Workshop Course 2 (ITB)
Keynote Speaker
Plenary Session
Parallel Technical Session
Field Trip
Field Camp
Author List
Technical Session
Welcome Remarks
Dear Colleague,
Geothermal Technology Master Program of Institut Teknologi Bandung (ITB) is organizing the
Fourth Annual ITB International Geothermal Workshop (4th Annual ITB International Geothermal
Workshop). This event is an immediate response from academic, government, and industrial
geothermal community by unifying forces to accelerate geothermal development in Indonesia.
The chosen theme is “Strengthening the Role of Human Resources for Geothermal Development”.
This event will be held at East Hall in ITB Campus, Bandung, March 16th – 20th, 2015. The program
will involve plenary session and paper presentation hosted by distinguished speakers which cover
the following topics:
1. Education and Research
2. Business and Regulation
3. Exploration / Earth Sciences
4. Exploitation / Engineering
5. Environmental aspects
This year theme “Strengthening the Role of Human Resources for Geothermal Development”, will
bring new information about current research, innovation and exploration results in some frontier
area of studies, in particular for Indonesian Geothermal Communities. Such results include
engineering research and exploration for geothermal low-medium enthalpy apart from advance
techniques in developing high enthalpy geothermal system.
We invite you to join our informative and exciting program in this 4th workshop which includes
pre-workshop courses and trainings, plenary sessions, technical paper presentations, geothermal
field camp and field trip.
Dr. Suryantini
4th ITB International Geothermal Workshop Organizing Committee
About ITB International Geothermal Workshop
Continuing our last theme of knowledge and experience sharing between universities and
geothermal industries to success Indonesia Government’s target in geothermal power generation,
our next focus would be on enhancement of human resources’ competences to boost geothermal
technology research.
Recognizing the importance of human resource competences and skills improvement to achieve
nationally geothermal capacity goals, ITB Geothermal Master Program conducts the workshop
with theme Strengthening the Role of Human Resources for Geothermal Development, which
aims to build the capacity of human resource in geothermal energy development in Indonesia.
The workshop represents a new approach to capacity development of human resource
management and skills improvement by facilitating the exchange of ideas, best practices and
innovations on a sustainable geothermal technology, expert group meetings, short training
courses, as well as field trip and field camp.
The overall objectives of the workshop is to make a contribution to the increasing number of the
geothermal experts and leaders especially on augmenting human resource knowledge and skills
to make a notable performance in the geothermal development in Indonesia.
For that reason, we will be conducting the workshop on March 16th – 20th, 2015 at ITB Campus.
The workshop will have the following exclusive objectives:
To draw attention from scientists, engineers, including academia, industrial stakeholders,
and also geothermal leaders about the significant role of capable human resource to
support geothermal development.
To facilitate a knowledge exchange forum with worldwide colleagues in education and
research, business and regulation, exploration, exploitation, and environment aspects of
geothermal development in Indonesia and all over the world.
Organizing and Technical Commitee
Steering Committee
Nenny Miryani Saptadji and Staff of Geothermal Technology Study
Program, FTTM – ITB
Vice Chairman
Muhammad Mirza Aquario
Secretary General
Fidya Varayesi ,Evanda Eko Putra Maris, Riostantieka Mayandari S
Fitri Oktaviani Purwaningsih, Rizki Trisna Hutami
Creative Team
Fuad G, Hendro H Wibowo
& Promotion
Prihadi, Damar Nandiwardhana, Gugun Abdurrahman, Hutra
Guswinanda, Andhika Arief Rachman Akib
Pre – Workshop
M. Rachmat Sule, Rangga Aji Nugraha, Waldy Afuar, Fery Ismar D, Nurita
Putri H, Sitti Nur Asnin, Mahesa Pradana, Ali Fahrurozi, Agastyo N
Technical Session &
Field Trip Kamojang
& Field Camp
Geothermal Photo
Hendra Grandis, Nurita Putri H, Sitti Nur Asnin, Mahesa Pradana, Ali
Fahrurozi, Agastyo N, Rangga Aji Nugraha, Waldy Afuar, Fery Ismar D
Suryantini, Betseba Br Sibarani, Dian Darisma
Betseba Br Sibarani, Rizki Trisna Hutami
Workshop Venue Map
ITB Campus Map
Workshop Venue Map
Room Layout
Pre – Workshop Courses
Pre Workshop Course 1
Monday-Tuesday, March 16-17th 2015
Application of Remote Sensing for Geothermal Exploration
(ITC Twente – ITB Joint Course)
Exploration Room, Geothermal Master Program, Energy Building 2nd floor
Day 1 : Introduction to GIS and Remote Sensing
(Dr. Dhruba Pikha Shresta)
Introduction to Remote Sensing/GIS
RS/GIS Applications in Natural Resources and Environmental Impact
Day 2 : Application of GIS and Remote Sensing in Geothermal
(Dr. Dhruba Pikha Shresta; Dr. Suryantini; Dr. Asep Saepuloh; Ir. Hendro Wibowo MSc)
Introduction to Thermal Infrared Remote Sensing
Application of Radar for Structural Mapping
Remote Sensing for Assessing Vegetation Stress in Thermal Areas
Spatial Analysis for Area Selection
Spatial Analysis for Well Targeting
Pre Workshop Course 2
Tuesday, March 17th 2015
Geothermal for Everyone (ITB Geothermal Study Program)
IMAGE Room at Geothermal Study Program, Energy Building 2nd floor
Day 1 : Geothermal for Everyone
(Dr. Suryantini, Ir. Nenny Miryani Saptadji, PhD, Ir. M. Ali Ashat, Dipl. Geothermal Tech.)
Geothermal System; Type, Worldwide Occurrence and Utilization
Coffee Break
Geothermal Manifestation and Geothermal Exploration
Engineering and Exploitation of Geothermal Energy
Coffee Break
Economic and Environmental Issue of Geothermal Energy Utilization
Keynote Speaker and Plenary Session
Wednesday, March 18th 2015
Venue : Aula Timur / East Hall
07.30-08.45 : Registration and Morning Coffee (registration continued after opening by Dean FTTM)
Opening and Keynote Speaker (Moderator : Nenny Saptadji )
Welcoming Remark from the Chairman of
Indonesia Raya
Opening of the IGW2015 by the Dean of
Keynote speaker-1 : National Energy Policy
Question and Discussion
Keynote speaker-2: Acceleration Program for
HRD for Supporting Geothermal Development
in Indonesia.
Question and Discussion
Sri Widiyantoro (Dean FTTM)
Abadi Purnomo
(Chairman of INAGA)
Triharyo Indrawan Soesilo
(President Director of Supreme
Energy Ltd.)
Plenary Session 1
Challenges and Opportunity in Geothermal Development
Opening and Keynote Speaker (Moderator: Rachmat Sule )
10.30 -11.00
Implication of New Geothermal Law to
Geothermal Development in Indonesia.
Majedi Hasan and Anton Wahyu
Sudibyo (PEN Consulting)
Challenges and Opportunity in Geothermal
Energy Development in Indonesia
Sanusi Satar
Modular Well Head Power GenerationBenefits of Matching Generation to the
Dave Jenson
Geothermal Drilling Program; An Alternative
(Green Energy Group)
Solution to Accelerate Geothermal Utilization
in Indonesia
LUNCH and PRESS CONFERENCE at Aula Timur A / East Hall A
Plenary Session 2
Resource and Reserve
Global Classification of Geothermal Resources
and Reserve
Geothermal Resources Risks and Mitigation
Antonie de Wilde
from A Private Sector Perspective: Mindoro
(Emerging Power Inc.)
Geothermal Project
Classification of Indonesia Geothermal
Resources and Reserve
Amir Fauzi
(PT. Geo Power Indonesia and PT.
Bio Energy Prima Indonesia)
Toward New SNI
Arief Munandar, Dikdik Risdianto
(Geological Agency)
Moderator Ali Ashat
Plenary and Technical Session
Thursday, March 19th 2015
Venue: Aula Timur / East Hall
Plenary Session 3
GEOCAP Netherlands – Indonesia Collaboration
Moderator : Murtiti Setiasih Muharamiah – ITC Twente
Geocap Overview, Research and Education
Freek D. van der Meer
(ITC Faculty Univ Twente)
Technical Paper 1 : ORC, TAG and TEG –
C.A.M. van den Ende, and C.
"Technology, Applications and Risks”
Savy (KEMA)
Technical Paper 2 : Processing Workflow for MT Wouter van Leeuwen
Exploration of A Geothermal Prospect
Guus Willemsen (IF Technology)
Technical Paper 3 : Thermal Energy Estimation
Setya Drana Hari Putra
of The Onshore North West Java Basin
Coffee Break
Plenary Session 4
USC-ITB Collaboration Funding by USAID-Star Energy
Moderator : Nenny Saptadji
Industry Commitment for Geothermal Capacity
Sanusi Satar – Star Energy
Technical Paper 1 : Use of Microseismicity to
Aminzadeh, F. and Lovenitti, J.
Predict Permeability in Geothermal Systems
Technical Paper 2 : Calibrating Exploration
Methodologies to Identify Hydrothermal and
Lovenitti, J. (USC)
EGS Drilling Target
Rachmat Sule, Andri D.
Technical Paper 3 : Microseismic Investigation
in Indonesian Geothermal Field
Technical Paper 4 : Resource Investigation of
Udi Harmoko
Low Temperature Geothermal Areas in Klepu
(Diponegoro University )
Sub-district, Semarang
Parallel Technical Session 1 and 2
Room A: Integrated Exploration / Earth sciences
Room B: Geophysics
Room C: Utilization, Social-Economic, Environment, International Collaboration,
Band performance , door prize announcement, Field Trip – Field Camp
announcement and preparation
Parallel Technical Session
Power Point File Check-In
For you who have not yet sent us your power point file via email in advance, you will be asked to
give your powerpoint file on first day of workshop (March 18). Please visit the author check-in
desk in East Hall ITB on March 18.
Time Allowance
The time allowance for each presentation in Technical Session is 15 minutes followed with a 5
minutes of Questions and Answers Session, which means that the total time you will have is 20
minutes. The speakers will be announced when the time lapse.
Please follow the bell signal:
First bell: You will have 5 minutes to finish your presentation (10 minutes passed)
Second bell: Your time is up (15 minutes passed)
Note for the Speakers:
Please be present in the room where you will give presentation 15 minutes before your session
Paper Code
: A  Room A (The paper will be presented in room A : Aula Timur A / East Hall A)
01  Paper Number
: Integrated Exploration / Earth sciences
: Geophysics
: Utilization, Social-Economic, Environment, International Collaboration, Education
Parallel Technical Session
Thursday, March 19th 2015
Room B
Aula Timur B/
East Hall B
Roy Wenas and
Wahyu S.
Hendra Grandis
and Fadli F.
Jooned H. and
Agastyo N.
14.00 – 14.20
14.20 – 14.40
14.40 – 15.00
15.00 – 15.20
Coffee Break
D.E. Irawan and
Ali Fahrurrozie
Rachmat Sule and
Tria Selvi R.
Asep S. and
Mahesa Pradana
15.30 – 15.50
15.50 – 16.10
16.10 – 16.30
16.30 – 16.50
2nd Session
15.20 – 15.30
Room C
Sayap Aula Timur/
East Hall Wing
1st Session
Room A
Aula Timur A/
East Hall A
: Paper Code, See the “Author List” on page 21 for details
Post – Workshop
Field Trip & Field Camp
Friday, March 20th 2015
Field Trip
This year’s program provides the opportunity for the participants to visit Wayang Windu
Geothermal Field. The field is being operated to world class standards by Star Energy. The trip will
become even more exciting as participants will be given a chance to enjoy the refreshing and
pleasant Malabar Tea Plantation in the end of the trip.
The Field Trip will be guided and instructed by the lectures and graduate students of the ITB along
with Star Energy representatives.
Field Camp
This program provides opportunity for participants to be introduced to geothermal field works,
characterization of geothermal systems and basic concepts of geothermal exploration. This year,
the geothermal field camp will be exercised in the incredible geological settings and features of
Tangkuban Parahu and its surrounding areas (Ratu Crater, Domas Crater, and Ciater).
The field camp courses are taught by the lectures and graduate students of the ITB Geothermal
Magister Degree Program: Instructor to participant ratios are ~ 4:1.
Author List
Author List
Paper Code
Integrated Exploration – Room A
Leapfrog Geothermal – A Comprehensive
Geological Modelling Tool for the
Clare Baxter
Geothermal Industry
3D Geology and Geophysical Modeling
Angga Bakti Pratama
Using Leapfrog; Lesson Learned.
Development Simulation Of Lainea
Lia Putriyana, Hari Soekarno
Geothermal Field
Integrated Data of Alteration, Geology, and Dimas Aji R. Prawiranegara,
Geochemistry of Bantarkawung Area;
Rizal Tawakal Alya, Sigit
Implication to Geothermal System
Yuniarto, Gandi Anas N. Hakim
Geochemistry – Room A
Occurrence of Non-volcanic Geothermal
K.P.B.D. Sudono, A.S.O.
Manifestations in Tarakan Basin, East
Tampubolon and N.R.
R. D. Mahantara, S. Khurniawan,
Volcanic Gasses and Unconfined
F. A. Rosyid, M. Chandra, M. I.
Groundwater Mixing in Cibuni Area: A
Hasani, S. Hidayat and D.E.
Preliminary Investigation
Geochemical and Geothermometry Studies Muhammad Abdurrozak
on Manifestations of Showers Seven and
Siamashari, Priyo Adi Nugroho,
Shower Three at Baturraden, Purwokerto,
Dhevi Andhini Antikasari, Irfania
Central Java
Fitria Arsah, As’ad Argiansyah
Geochemistry Study For Identification of
Sitti Nur Asnin, Suryantini,
Seawater Intrusion Into A Geothermal
Antonie de Wilde
Geophysics – Room B
Magnetic Data Analysis for Subsurface
Ratu Mifta Fadilla dan Rosita
Structure Identification at The Geothermal
Field of Way Ratai, Padang Cermin
Audio-Magnetotelluric Investigation at The
Andriyan Saputra, Widodo and
Geothermal Prospecting Area in Pariangan
Muhammad Kholid
Tanah Datar, West Sumatra
The Application of Magnetotelluric Method
Agung Bimo Listyanu, Widodo,
in Geothermal Prospect Area of Mount
Tony Rahardinata
Batur, Kintamani, Bali
Optimizing 2D Resistivity Method to Reveal Prihadi Sumintadireja, Diky
Complex Structures Beneath an Old Basaltic Irawan and Hendra Grandis
Volcano in West Java, Indonesia
Geophysics – Room B
High Resolution Delay Time and Shear Wave
Splitting Tomography for Reservoir
Rexha Verdhora Ry, Tania
Monitoring of The “RR” Geothermal Field,
Meidiana, and Andri Dian
West Java, Indonesia Using MicroNugraha
earthquake Data
Determination of Focal Mechanism, Local
Magnitude, and Coda Magnitude of
Massita A. C. Putriastuti and
Microseismic Event in “North Villy”
Andri Dian Nugraha
Geothermal Field, Indonesia
Microgravity Modelling for Mass Balance
Ferry Rahman Aries and Hendra
Estimating Fluid Pathsatsurface Geothermal
Deny Dwi Nurwati, Asep
System Using Surface Roughness Model of
Saepuloh and Prihadi
Polarimetric Synthetic Aperture Radar
(Polsar) Data
Utilization – Room C
Geothermal Direct Use for Breweries
Rob Kleinlugtenbelt
Geothermal Energy Applications as a Coffee
Drying Technology to Increase Coffee
Taufiq, Farkhan Raflesia and Nur
Production in Ulubelu Geothermal Field,
Sya’bana Santoso
Modelling of Milk Pasteurization System
Ichwan A.E, Nursanty B, Ariel
Using Geothermal Energy.
H.G, Jooned Hendrarsakti
The Evolution of Liquid Dominated
Geothermal Reservoir Under Exploitation :
Heru Berian
A Review
Geology, Geochemistry – Room C
Volcanotratigraphic Study Based on
Topography and Remote Sensing Analysis
Betseba Br Sibarani, Evanda
and Its Implication to Wayang Windu
EPM, Dian Darisma
Geothermal System
Geochemical Analysis of Hot Spring and
Fauzu Nuriman, Yudhi Try
Hydrothermal Alteration of Geothermal
Saepuddin and Ryan Jodi
Prospect at Kendalisodo, Semarang District,
Central Java
Geochemistry of Hot Water and
Interpretation of Permeable Zone from
Heri Nurohman, Hendra Bakti
ASTER-GDEM and Radon Concentration in
and Sri Indarto
Mount Slamet, Central Java, Indonesia
Application of Geochemical Methods in
Anggita Agustin and Dasapta
Geothermal Exploration in Indonesia: A
Erwin Irawan
Literature Review (Part 1)
Spatial Association of Geological Features
With Geothermal Producing Wells; A
Literature Review From Geothermal Field
in Indonesia
Mapping of Magnetic Anomaly Zone to
Identification Heat Source of Hot Spring
Manifestation in Desa Pinaras Tomohon
North Sulawesi
Comparison Geothermal Potential on
Mount Kendeng and Mount Patuha Base on
Vulcanostratigraphic Study
Volcanostratigraphy Studies and Its
Implications of Geothermal System based
on Topographic Map And SRTM (Shuttle
Radar Topography Mission) Map at
Awibengkok-Salak Geothermal Field, West
Collaboration Program on Geothermal
District as Geothermal Direct Use in
Suryantini, A. Prihadi and H.H.
Donny R. Wenas, Cyrke A. N.
Chikal Rakhmatan, Ryan Hidayat
and Damar Nandiwardhana
M. Nurwahyudi Yulianto, Rizki
Trisna Hutami and Fery Ismar
Nursanty Elisabeth, Ichwan
Elfajrie, Jooned Hendrasakti,
Tubagus Nugraha, Imam Asmara
Technical Session
CODE : A01
Leapfrog Geothermal - A Comprehensive Geological Modelling Tool for The Geothermal Industry
Clare Baxter
ARANZ Geo Limited
CODE : A02
3D Geology and Geophysical Modeling Using Leapfrog; Lesson Learned
Angga Bakti Pratama
Magister Program in Geothermal Technology ITB
Institut Teknologi Bandung (ITB), Jl. Ganesa 10 Bandung, Indonesia
3D conceptual model can be made by combining all data from the study that have been conducted. Geological, geochemical, geophysical,
well data and other study were needed to give a better explanation about geothermal system. Availability of the data depend on the
geothermal field development stage. In this study we try to create a 3D conceptual model who were in the preliminary survey stage, so there
will be a limitation for constructing the model especially in geological model because the geological information only based from surface
information. All the study should have a result in 3D geometry so it make interpretation easier. To get the 3D geometry sometimes we also
have to confront with software limitation, in this case with 3D inversion geomagnetic processing. So in this study, constructing a 3D
geological model only based on surface study and 3D geomagnetic data modeling will become a headline to be discussed. To create a 3D
geological model was started by making geological section to help a subsurface lithological prediction. Based on the section that have been
made, a 3D geological model were constructed by combining all the information from section into lithological model. For the magnetic
susceptibility model based on geomagnetic survey we can predict the heat source location based on demagnetization body that can be
interpreted from the result of geomagnetic data processing. The geomagnetic data processing conducted until 2D inversion only, so we need
visualization to have a 3D geometry result. The 3D visualization result depend on the data quantity and interpolation method. Using all that
method a 3D conceptual model that have information about geothermal system can be made even in preliminary survey stage.
CODE : A03
Development Simulation Of Lainea Geothermal Field
Lia Putriyana, Hari Soekarno
Puslitbangtek Ketenagalistrikan, Energi Baru, Terbarukan, dan Konservasi Energi
[email protected]; [email protected]
Lainea geothermal field located in South East Sulawesi, subdistrict South Konawe. On 2012, intergrated survey of geology, geochemistry and
geophysics has been conducted by Pusat Source Daya Geologi to determine prospect area. Geology survey is aimed to get mapping,
structural and site interpretation. Geochemistry survey is a fundamental tools to support geothermal exploration, fluid and gas sampling,
geothermometer, and analysis of fluid patterns also environmental issues as a data base. Geophysics survey can improved understanding of
subsurface structure. Temperature gradient drilling or thermal gradient holes for direct measurement of temperature field has been
conducted in 4 different locations, LNA-1, LNA-2, LNA-3 and LNA-4. Gradient thermal as a result of temperatur gradient drilling shows
anomaly area in 3 different locations around manifestations.It provides valuable information/most reliable information on the subsurface.
Capacity estimation of power plant with different development scenarios results binary power plant capacity in 1250 kW (Scenario 1, one
production well) and 2250 kW (Scenario 2, two production wells). Analyzing and predicting the behaviour of a geothermal resource over time
is a critical element to ensure availability of geothermal fluid as a working fluid for geothermal power production.The information gained
from integrated survey and temperatur gradient drilling will support numerical reservoir modelling and assessment.
Keywords : Non volcanic geothermal field, reservoir assessment
CODE : A04
Integrated Data of Alteration, Geology, and Geochemistry of Bantarkawung Area; Implication to Geothermal System
Dimas Aji R. Prawiranegara, Rizal Tawakal Alya, Sigit Yuniarto, Gandi Anas N. Hakim
Geological Engineering Department Faculty of Engineering, University of Jenderal Soedirman
[email protected]
Brebes is located in the western part of the mountain Slamet, in this area there are several hot springs as geothermal surface manifestations.
The appearance of these hot springs by some studies are considered as an influence by geothermal systems of Mount Slamet. However, the
presence of intrusions in some places can be considered responsible for the occurrence of geothermal manifestations. Bantarkawung is area
in Brebes with interesting geological conditions to be studied and has a geothermal manifestations and intrusion around the study area. The
study focused on alteration and geological characteristics in the area of research that can be known geothermal systems research area. The
method used in this study consists of mapping of surface alteration which indicated hydrothermal activity in the area of research, supported
by secondary data, Fault and Fracture Density (FFD) and geochemistry of hot water. Based on the research, this area is composed of
claystone unit, sandstone unit, and igneous intrusions. There are deposits of travertine around the hot springs, FFD anomaly is in the
northern part of the study area, the hot water temperature between 43 C-62 C field with bicarbonate-chloride water type and showed
partial equilibrium. Spreading rock alteration and placer deposits is more intense around igneous intrusions. Integration of new data in the
form of geological data, geochemical, and surface alteration may open a new understanding of geothermal systems in Brebes especially
Bantarkawung area.
Keywords : Alteration, Bantarkawung, Geochemistry, Geology, Geothermal
CODE : A05
Occurrence of Non-volcanic Geothermal Manifestations in Tarakan Basin, East Borneo
K.P.B.D. Sudono, A.S.O. Tampubolon, N.R. Herdianita
Geological Engineering Study Program, Faculty of Earth and Science Technology, ITB
[email protected]
Tarakan basin was a sedimentary basin with several sub-basin located in East Borneo. Several hot springs were found in several area within
the basin and its surrounding area. However the occurrence of hotsprings within the sedimentary basin was still unclear.The origin of hot
water was analyzed from the water geochemistry. Then soil and gas geochemistry were also analyzed to detect subsurface anomaly. Heat
flow, thermal conductivity and geothermal gradient derived from old oil exploration wells were interpolated and used to approximate a
hypothetical model that would explain how geothermal was heated and flowed onto the surface by abnormal geothermal gradient within
Tarakan basin and produced a surface manifestation.
The water chemistry data showed the water mostly influenced by sedimentary rocks. The hydrothermal system was interpreted as anonvolcanic system.Regionally the heat could be transferred to the surface through conduction. However on a smaller scale, local geological
structure could augment the geothermal gradient by allowing convection of geothermal fluid unto the surface.
Keywords : Tarakan basin, East Borneo, water geochemistry, heat flow, geothermal gradient
CODE : A06
Volcanic Gasses and Unconfined Groundwater Mixing in Cibuni Area: A Preliminary Investigation
R. D. Mahantara, S. Khurniawan, F. A. Rosyid, M. Chandra, M. I. Hasani, S. Hidayat and D.E. Irawan
Department of Geology, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung
[email protected]
Cibuni crater is one of the surface manifestations of Patuha Geothermal System which is vapor dominated. A river flowing across the crater
triggers mixing process between volcanic gases such as H2S, CO2, Cl2, and etc emitted from the crater with surface water and ground water.
The purpose of this research is to find preliminary indications of such mixing in the groundwater. As many as 9 groundwater spring and 13
river points have been measured for Cl, pH, TDS, and temperature to detect traces of volcanic gases in the unconfined aquifer system.
Groundwater level has also been measured at each point to produce water flow map. This preliminary investigation shows no mixing process
in groundwater, as indicated by normal values from the measurements: Cl (0.02-0.04 mg/l), TDS (20-124 mg/l), and temperature (17.2 Co
20.7 C). Such mixing only possibly occurs in the Cibuni river water, as shown by the higher values. Effluent water flow from aquifer to the
river is also identified from the flow map. Dilution process occurs to this river by groundwater flow, along with the dilution by other river in
the some watershed. This research shows the connection between groundwater and river water in the area. It also detects the occurrences
of mixing water based water quality. However, more data are needed to build more detail water flow and hydrochemical model.
CODE : A07
Geochemical and Geothermometry Studies on Manifestations of Showers Seven and Shower Three at Baturraden, Purwokerto, Central
Muhammad Abdurrozak Siamashari, Priyo Adi Nugroho, Dhevi Andhini Antikasari, Irfania Fitria Arsah and As’ad Argiansyah
Universitas Jenderal Soedirman, H.R. Boenyamin, Purwokerto, Central Java
[email protected]
Geothermal in the Act No. 21 , 2014 is a source of heat energy contained in the hot water, steam and rock along with other associated
minerals and gases that are genetically inseparable in a geothermal system. Most of geothermal production fields in Indonesia are situated in
Java Island. Some of geothermal prospects are associated with a specific geological setting on Java. Those geological setting are on a
subduction zone which is located on the South of Java Island. The subduction of oceanic crust (Indo-Australia) beneath continent crust
(Eurasia) produces magma that ascends to the surface and forms a volcanic arc along Java Island. Volcanoes in Java are dominantly
composed by andesitic rock that is related with a stratovolcano - high terrain geothermal system. One of geothermal systems associated with
volcanic island of Java is the geothermal system in Baturradenlocated at the foot of Mount Slamet. Geothermal systems in Baturraden has
the potential 175 MW with an area of 24,660 ha. In this geothermal systems, there are manifestations of geothermal energy in the form of
hot springs and Pancuran 7 and Pancuran 3. Making this paper aims to compare both the hot springs are based on geochemical data and
geothermometry fluid. Sampling for geochemical analysis is in the form of samples of water, soil, and rocks that surround the area
manifestations. While collecting data for analysis geothermometry derived from water temperature and air temperature around the hot
springs. We want to know hot fluid classification using Ternary diagram. Data from the diagram is used to determine the level of maturity of
the geothermal system and to determine reservoir temperature and to recognize equilibrated waters suitable for geothermometry
CODE : A08
Geochemistry Study For Identification of Seawater Intrusion into a Geothermal System
Sitti Nur Asnin , Suryantini , Antonie de Wilde
Geothermal Technology Study Program, Faculty of Mining and Petroleum Engineering (FTTM), Institut Teknologi Bandung (ITB), Jl. Ganesha
10, Bandung 40132, Indonesia
Applied Geology Research Division (KK GeologiTerapan), Faculty of Earth Sciences and Engineering (FITB), Institut Teknologi Bandung (ITB)
Emerging Power International, Phillipines.
[email protected]
A geothermal system which is located adjacent to the coast line may be influenced by seawater intrusion. The input of seawater into surface
or subsurface thermal water will influence the chemical composition of springs that emerge to the surface. Subsequently this will affect the
interpretation of reservoir properties such as, for example, reservoir temperature.
This study presents the results of a geochemistry survey to investigate seawater intrusion into a non-volcanic geothermal system located
near the seashore. Thermal manifestations consist of warm to hot springs (30-77 C) and gas seepage. Some of the manifestations occur
within the tidal zone and some of them are submerged in the shallow seawater. Sampling and analysis of surface thermal manifestations
show that there is an anion-cation, stable isotope of δ18O and δD which does not originate from seawater. It suggests that seawater
intrusion is absent from the system. The thermal waters are of meteoric origin. In addition, calculation of common geothermometer
measures of other reservoir fluid properties were performed, confirming this finding. The estimated reservoir temperature is 180-200 C.
Keywords : Coastal, Deuterium, Isotope, Non-Volcanic, Manifestation, Oxygen-18
CODE : B09
Magnetic Data Analysis for Subsurface Structure Identification at The Geothermal Field of Way Ratai, Padang Cermin
Ratu Mifta Fadilla and Rosita Renovita
University of Lampung
[email protected] ; [email protected]
Way Ratai is a village in Piabung sub-district, Pesawaran district, Lampung. Ratai Mountain have a unique geological structure ,until need to
do geophysics preliminary survey with magnetic method. This research is to find out of the geology structure of the area geothermal
prospect ,with spacing 200m using a Magnetometer Quantum and GPS handheld. the inklinasi value in this research area is -29 and
deklinasi value is 0 . Data processing begins with IGRF corrections and daily variations corrections concerning to base value obtain magnetic
total value. After that make the contours of a magnetic total field using software Surfer 10. Will look at the pattern of dipole at the contours.
As well as make slice on the contours data will be used as modeling in the Mag2DC. On the output of Mag2DC modeling has been correlated
with geology map then obtained the top layer of the left with a suseptibility value is 0,4 nT the form of sandstones and shale. The bottom
with a layer of suseptibility value is 1,4 nT the form of basalt rocks. The top layer of the right hand with a suseptibility value is 0,02 nT the
form of shale.The bottom with a layer of suseptibility value is 1,5 nT the form of basalt rocks.
Keywords : Magnetic data analysis, subsurface Identification, Ratai Geology
CODE : B10
Audio-Magnetotelluric Investigation at The Geothermal Prospecting Area in Pariangan Tanah Datar, West Sumatra
Andriyan Saputra , Widodo , Muhammad Kholid
Geophysical Engineering, Faculty of Mining and Petroleum Engineering, ITB
Geological Resource Center (PSDG)
[email protected] ; [email protected]
The Audio-Magnetotelluric (AMT) method is made to determine variations in electrical resistivity of earth with depth. In order to determine
geothermal conductivity structure, we used 1-D and 2-D models using AMT real data from geothermal study area in Pariangan, Tanah Datar,
West Sumatra. Our result shows that all of these technique can delineate different number of layers and structure beneath the study area.
We assumed that for first layer as the conductive zone (±10 Ωm) indicated as the quartz sandstone contain with clay content, the second
layer with resistive layer (±100 Ωm) and the last layer with high resistive value can be interpreted as the granitic (±1000-10000 Ωm) which is
the basement of geothermal system.
CODE : B11
The Application of Magnetotelluric Method in Geothermal Prospect Area of Mount Batur, Kintamani, Bali
Agung Bimo Listyanu , Widodo , Tony Rahardinata
Geophysical Engineering, Faculty of Mining and Petroleum Engineering, ITB
Geological Resource Center (PSDG)
[email protected] ; [email protected]
In achieving the energy acceleration program to become 9500 MWe in 2025 which is a government alternative in the provision of
geothermal resources, the efforts needed to be made for inventory, investigation, research, and exploration in geosciences in order to get
geothermal potential data. Magnetotelluric method is used in this project because of its ability to map deep resistivity structure. Twelve
measurement stations are used in the analysis, divided into 2 line which perpendicular and parallel to the regional strike direction. In the
resistivity model, caprock is indicated by the appearance of 8-20 Ωm with the height of 1000-1200 m until the depth of -1000 m which has
the thickness of 1300-1500 m. Meanwhile, the reservoir is indicated by the appereance of 12-100 Ωm with -125 m until -100 m of top
reservoir depth. The location of geothermal prospect lies on the area of Batur Tengah Village, Batur Nandang Dalem, to the Songan A Village.
Keywords: Geothermal, Magnetotelluric, Mount Batur, Kintamani, Bali
CODE : B12
Optimizing 2D Resistivity Method to Reveal Complex Structures Beneath an Old Basaltic Volcano in West Java, Indonesia
Prihadi Sumintadireja , Diky Irawan S and Hendra Grandis
Applied Geology Research Group, Faculty of Earth Science and Technology - ITB
Graduate Program in Geophysical Engineering, Faculty of Mining and Petroleum Engineering - ITB
Applied Geophysics Research Group, Faculty of Mining and Petroleum Engineering – ITB
[email protected]
Mount Manglayang is one of the B-type volcanoes located at eastern part of Bandung, West Java, Indonesia. A Geophysical resistivity survey
with the vertical electric sounding (VES) method using Schlumberger electrode array configuration was carried out at the summit of this
volcano. We performed a quasi-2D modeling by inversion of VES data using guided random search algorithm and applied vertical and lateral
smoothness constraints. The imaged subsurface resistivity distribution has a good agreement with the local geology of this area. The nearsurface resistive bodies correspond to the basaltic rocks found along the VES measurements line. Conductive layers beneath the resistive
bodies in the northern part were interpreted as a reservoir aquifer system providing fresh water resources for the surrouding areas.
Discontinuities of the resistive body between northern and southern sections can be associated with geologic structures, due to volcanic
edifice landslides. The conductive body below the summit of the volcano (southern part) could be interpreted as an alteration zone. The
existence of such alteration zone indicates a possibility of “hidden” geothermal system with low to middle enthalpy. A shallow drilling for
temperature survey is necessary for further investigation at this area.
CODE : B13
High Resolution Delay Time and Shear Wave Splitting Tomography for Reservoir Monitoring of The “RR” Geothermal Field, West Java,
Indonesia Using Micro-earthquake Data
Rexha Verdhora Ry , Tania Meidiana , and Andri Dian Nugraha
Master Program of Geophysical Engineering, Faculty of Mining and Petroleum Engineering,
InstitutTeknologi Bandung, JalanGanesha No.10, Bandung 40132, Indonesia
[email protected]
Global Geophysical Group, Faculty of Mining and Petroleum Engineering,
InstitutTeknologi Bandung, JalanGanesha No.10, Bandung 40132, Indonesia
[email protected]
Intensive geothermal exploitation at the “RR” geothermal field in West Java, Indonesia, induces micro-earthquakes which are monitored by a
local seismometer network. Using this network, tomographic inversions were conducted for the three-dimensional Vp, Vs, and Vp/Vs
structures of the reservoir for January 2007 to December 2009. We used dense parameterization blocks to image velocity structure of
reservoir with high resolution. We relocated hypocenters location and updatedone-dimensional initial velocity models using Velest
method.Then, we conducted seismic tomographic inversions using delay time tomography. We also conducted shear wave splitting (SWS)
tomography to image subsurface anisotropy distribution. Our tomographic inversion results indicate the presence of low Vp, low Vs, and low
Vp/Vs at depths of about 1 – 3 km below MSL. This features were interpreted as steam-saturated rock in the reservoir area of The “RR”
geothermal field.The existences of the reservoir area are supported by the data of well-trajectory.Futhermore, SWS tomography results
image high anisotropy located at elevations of about -0.5 to -3 km and can be related to the fractures caused by injection well in the
geothermal field. The extensive low Vp/Vs anomaly that occupies the reservoir is attributed to depletion of pore liquid water in the reservoir
and replacement with steam. Continuous monitoring of Vp, Vs, and Vp/Vsis an effective geothermal reservoir characterization and depletion
monitoring tool and can potentially provide information in parts of the reservoir which have not been drilled.
Keywords : MEQ, velest, delay time tomography, shear wave splitting, reservoir monitoring
CODE : B14
Determination of Focal Mechanism, Local Magnitude, and Coda Magnitude of Microseismic Event in “North Villy” Geothermal Field,
Massita A. C. Putriastuti and Andri Dian Nugraha
Geophysical Engineering, Faculty of Mining and Geophysical Engineering,
Institut Teknologi Bandung, Ganesha No.10, Bandung 40132, Indonesia
Email: [email protected]
Global Geophysical Research Group, Faculty of Mining and Petroleum Engineering,
InstitutTeknologi Bandung, Ganesha No.10, Bandung 40132, Indonesia
Email: [email protected]
Geothermal exploration is not like oil and gas industry which use active seismic as a stable method, this exploration still has a problem in
using active seismic due to high attenuation in volcanic area. Many method has been applied in geothermal industries including microseismic
monitoring to help people to understand about reservoir characterization. The objective of this research is to determine local fault signature
and fracture structures in geothermal field, determine directions of fluid movement, and assess hazard mitigation due the seismicity caused
by production in “North Villy” Geothermal Field (not real field name) which has been recorded by 5 stations for ± 6 months. In this study, we
conducted focal mechanism analysis with full waveform modeling method, local magnitude and duration magnitude calculation. The results
of this research show domination of fluid movement that caused the micro earthquakes in the production area. Fluid movement can be seen
flowing to “CHRS” Lake,while below the production area there are hydrothermal activities which moving along fractures with ± 35 ° dip , and
there is also a dextral , sinistral , normal and oblique fractures in eastern research area, showing that this area is still in a very active form. In
addition, the results of local magnitude and duration magnitude show a similar value of less than 3.So, we concluded that the production
activities is still safe and did not have a big impact on the area around the geothermal field for this time period observation.
focal mechanism, local magnitude, duration magnitude
CODE: :Microseismic,
Microgravity Modelling for Mass Balance Monitoring
Ferry Rahman Aries and Hendra Grandis
Master Program of Geothermal Technology
Applied Geophysics Research Group
Faculty of Mining and Petroleum Engineering
Bandung Institute of Technology, JalanGanesha 10 Bandung
Email: [email protected]
Geothermal field sustainability controlled by both how much enthalpy stored in heat source and how much fluid remain in reservoir that
heated by this heat source. Geothermal fluid in reservoir are extracted to the surface by production wells, thus a “cold water” are injected to
the reservoir by reinjection wells to maintain the fluid in reservoir. Geological complexities may result not all reinjection fluid filtrated into
reservoir. Thus, there will be a slight different of gravity change due to mass difference. These change are very small, and need precise
gravity measurement. For this purpose, precise gravity data observation must be done periodically over the production period. Geothermal
reservoir geometry is approached with one layer 3-D prism model, so the density change distribution can be determined laterally with simple
linear inverse method.
The method is applied to Kamojang Geothermal Field data spanning from 1984 to 1999. Negative gravity change distribution at central of the
area corresponds to geothermal fluid extraction to the surface by the production wells. Positive gravity change distribution at recharge area
corresponds to fluid reinjection to ground by reinjection wells. The magnitude of the gravity value is in 100 μGal order, while density value is
in 0.1 gr/cc.
CODE : B16
Estimating Fluid Pathsatsurface Geothermal System Using Surface Roughness Model of Polarimetric Synthetic Aperture Radar (Polsar)
Deny Dwi Nurwati , Asep Saepuloh
and Prihadi Sumintadireja
Study Program of Geothermal, Faculty of Mining and Petroleum Engineering-ITB
Faculty of Earth Sciences and Technology-ITB
Jl. Ganesha 10, Bandung, Indonesia
E-mail: [email protected]
Identifying fluid paths in fractured zones are crucial for geothermal exploration and exploitation, especially for estimating recharge and
discharge zones. Fractured zones usually could be estimated using Linear Features Density (LFD). In this study, we combined the surface
roughness model and LFD for identifying recharge and discharge zones at ground surface of geothermal system. The Phased Array type Lband Synthetic Aperture Radar (PALSAR) on board the Advanced Land Observing Satellite (ALOS) were used in this study. The surface
roughness modeling was generated using full polarimetricALOS PALSAR data. The surface roughness measurement at field study was used as
basis of modeling. Furthermore, field survey data were also used to control the correctness of the model due to backscattering variability
from surrounding objects. The full Polarimetric SAR (PolSAR) sensor has capability to transmit and receive microwave radiation in Horizontal
(H) and Vertical (V) directions termed as HH, HV, VH, and VV. The PolSAR has advantage in describing different types of scattering presented
by surface scattering, low-order multiple scattering (double bounce), high entropy scattering (volume), and dielectric target scattering. We
selected Mt. Manglayang in West Java Province, Indonesia as study area. The volcano has summit elevation about 1818 m above mean sea
level. The result of this study showed that the surface roughness model and LFD could be used to estimate recharge and discharge zones at
ground surface. We could define that the recharge and discharge zones are located at high surface roughness and LFD.
Keywords : Mt. Manglayang, Polarimetric SAR, Surface Roughness Model, Linear Features Density (LFD)
CODE : C17
Geothermal Direct Use for Breweries
Rob Kleinlugtenbelt
IF Technology
Breweries use a lot of heat in their processes. Usually, steam is generated using gas fired boilers, creating steam at temperatures between
140 to 180°C. With the increasing awareness that fossil energy use and CO 2-emissions should be minimized, breweries in the Netherlands are
looking for more sustainable sources of heat, including geothermal energy.
This study focuses on the integration of geothermal heat into the process of a brewery in the Netherlands, while optimizing the financial
business case. In the Netherlands a typical geothermal temperature gradient is approximately 30°C/km. With this temperature gradient and
the use of heat pumps, it is possible to deliver a significant amount of sustainable, geothermal heat to the brewery.
The business case depends on many variables, including the subsurface potential, processes and energy prices. Due to the feed in tariff in the
Netherlands for renewable heat, the business case can be good. A sensitivity analysis will give insight in the financial feasibility for breweries
in Indonesia.
CODE : C18
Geothermal Energy Applications as a Coffee Drying Technology to Increase Coffee Production in Ulubelu Geothermal Field, Lampung
Taufiq, Farkhan Raflesia, Nur Sya’bana Santoso
Geophysical Engineering Department, Engineering Faculty University of Lampung
Soemantri Street No.1, Bandar Lampung
Email : [email protected]
Geothermal is a source of heat generated in the earth as a result of the process of geology and geophysics. As a result of the process, forming
a geothermal system that is likened to a boiler, heat source is obtained from the movement of magma under the earth or magma in
volcanoes, the heat then radiates into the rock to the aquifer and then heated through the process of convection. As the cooking water,
boiling water vapor can form directly to the surface because of the covering which was prevented by an impermeable layer (caprock) so that
vapor exists at high temperatures and pressures pushed up to the surface through faults and fractures in the rock lead to the manifestation
of the surface. The energy generated from the heat source is called geothermal energy. The application of geothermal energy is generally
used as the driving force in power plants, but the steam produced can also be used directly as a result of agricultural drying technology. Using
case studies, literature, and comparative studies that we try to apply in Ulubelu geothermal field, Lampung, which is one of the coffeeproducing areas and the areas with geothermal potential in Indonesia, coffee drying technology obtained by passing steam or brine from
geothermal wells to heat exchangers and heat is passed to the drying room. With a temperature of 125ºC - 250ºC, geothermal energy
capable of drying coffee within 2-4 days, 5x faster than conventional drying (10-14 days with temperature 60-80ºC). From this study we
concluded that the use of geothermal energy as a coffee drying technology in Lampung Province has several advantages such as quality and
hygienic product, land drainage is relatively small, and ease labor and relatively easy. It certainly can help increase the production of coffee
farmers and can boost the economy in Lampung Province.
Keywords : geothermal, coffee drying technology, CSR
CODE : C19
Modelling of Milk Pasteurization System Using Geothermal Energy.
Ichwan A. Elfajrie , Nursanty E. Banjarnahor , Ariel H. Gursida , Jooned Hendrarsakti
Indonesia Geothermal Center of Excellence, Soekarno-Hatta 576, Bandung, Indonesia
InstitutTeknologi Bandung, Tamansari 64, Bandung, Indonesia
e-mail: [email protected]
Geothermal energy can be used directly in a variety of applications, where the combination of a variety of applications in the synergies and
chain system can be called a cascading system. One of the applications on a cascading system using geothermal energy is milk pasteurization.
The high consumption of dairy milk in Indonesia is one of the reasons for the importance of innovation in the milk pasteurization system. The
heat required in the heat transfer of milk pasteurization process can be extracted from geotherma lbrine. In cascading system, milk
pasteurization can be the first application by reference to Lindal Diagram before another application, such as binary cycle. Modelling of heat
transfer needed to determine the milk pasteurization process design. Were commend the use of three gasketed plate heat exchangers, in
which each heat transfer between process water with milk, process water with geothermal fluid and process milk with cooling water
.Geothermal fluidat 160 C is used to heat 3000 gph of milk, where the output geothermal fluid temperature is 152.6 C, and planned to be
used for the next system in the cascading system. The total investment of al lheat exchangers is equal to IDR 61,5 million, IDR 31,5 million
more efficient than heating the milk using a boiler and two gasketed heat exchangers. Utilizing geothermal fluid to heat the milk is also more
efficien tabout IDR 5 million per day compared to using diesel.
Keywords : Direct use, milk pasteurization, geothermal brine
CODE : C20
The Evolution of Liquid Dominated Geothermal Reservoir Under Exploitation : A Review
Heru B. Pratama
Magister Program in Geothermal Technology ITB
Institut Teknologi Bandung (ITB), Jl. Ganesa 10 Bandung, Indonesia
[email protected]
Mostly in the world, liquid-dominated hydrothermal system is used widely for direct and indirect utilization even in Indonesia. Therefore,
most study of geothermal field discussed how to utilized liquid-dominated hydrothermal system with proper production-injection strategies
to obtain sustainable development. Production and injection processes involving mass and heat transfer from the fluid reservoir will trigger
changes in the characteristics of the liquid-dominated reservoir. The characteristic changes include an increase of the enthalpy of the fluid,
boiling, steam-capformation. The increased production of geothermal fluid needs a lot more of steam, the process exploitation of steam
from steam-cap can’t be offset by the establishment of its steam-cap itself. Thus, a proper production-injection strategy make sustainable for
liquid-dominated geothermal reservoir.
Keywords : liquid-dominated, steam-cap, production-injection, sustainability
CODE : C21
Volcanotratigraphic Study Based on Topography and Remote Sensing Analysis and Its Implication to Wayang Windu Geothermal System
Betseba br Sibarani, Evanda Eko Putra Maris, Dian Darisma
Postgraduate Program of Geothermal Engineering, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology
Jalan Ganeca 10, Bandung, West Java, Indonesia
E-mail: [email protected]
The Wayang – Windu geothermal field is located about 35 km south of Bandung. This field has installed electric capacity by 220 MWe with a
total 39 drilling wells. From all of these wells, there are some unproductive wells located in North Malabar Volcanic Complex, in the vicinity
of Mt. Puncak Besar. The approach that can be used to determine the cause of the drilling failure is with vulcanostratigraphic study of
geological conditions of the research area through topography and remote sensing analysis. The result were used to evaluate and validate
geothermal potential in the region, and compared with some subsurface data.By identifying and analysing of topographic map of Mt.
Wayang – Windu area scale 1:100.000, it was found 11 khuluk. With making lineation trend on a map scale of 1:50.000 Bandjaran Sheet, with
a smaller area, it was found 9 khuluk. While by analysing the SRTM map, there are 3 gumuk on Khuluk Wayang – Windu and 5 gumuk on
Khuluk Malabar. Both khuluk is estimated to be a heat source that affects different geothermal systems. This is also supported by the MT and
gravity anomalies data which show the existence of two positive anomalies as an indication of the presence of two different heat sources.
Based on the geothermal evaluation from Wohletz and Heiken flow chart, Khuluk Wayang – Windu has a potential to produce geothermal
energy, but on the contrary with Khuluk Malabar. Therefore, there are some unproductive wells around Khuluk Malabar.
Keywords : volcanostratigraphic study, geothermal potential, Wayang – Windu; khuluk, gumuk
CODE : C22
Geochemical Analysis of Hot Spring and Hydrothermal Alteration of Geothermal Prospect at Kendalisodo, Semarang District, Central Java
Fauzu Nuriman, Yudhi Try Saepuddin and Ryan Jodi Pratama
Teknik Geologi, Universitas Diponegoro, Semarang
JL. Prof. H. Soedarto, SH, Kampus Tembalang Semarang-50239 ,Jawa Tengah
Telp. 024-7460038, Fax. 024-7460038
[email protected]
Kendalisodo is area that is assumed to have geothermal potential. It is based on the surface manifestations such as hot spring and rock
alteration. This research supported by secondary data and existing literature. Geothermal fluid geochemical analysis conducted in the area of
hot spring is used to determine the chemical characteristics of the fluid, fluid type, and temperature reservoir. Rocks around Kendalisodo
analyzed by petrographic methods to determine the mineral composition changes. It also test the physical properties of rocks like porosity,
permeability, and density. Based on research on the 5 hot spring known that the temperature between 36-40 C and pH between 5.9-7.8.
Type of fluid in the study area the dominant form of bicarbonate fluid. Rock alteration is found generally in the form of alteration of andesite,
which is generally transformed into clay minerals in the argillic zone. Alteration in andesite are divided into three classes, weak alteration
intensity, moderate, and strong, that it depends on the size composition of secondary minerals. Alteration causes decrease value of porosity
and increase the density. Based on the analysis geothermometer Na-K-Ca obtained by 175,19 C reservoir temperature that makes the
location of the geothermal system is assumed as a medium enthalpy geothermal systems.
Keywords: alteration, geochemical, Kendalisodo, a medium enthalpy geothermal systems
CODE : C23
Geochemistry of Hot Water and Interpretation of Permeable Zone from ASTER-GDEM and Radon Concentration in Mount Slamet, Central
Java, Indonesia
Heri Nurohman, Hendra Bakti and Sri Indarto
Research Center for Geotechnology - LIPI
Complex of LIPI buildings, Sangkuriangstreet, Bandung 40135
[email protected]
Mount Slamet is one of the active volcanoes in Java with geothermal potential inside. Hot springs are discharging in the north, west, and
south of Mount Slamet. Nine hot water samples were collected from Guci (6 samples), Kalipedes (1 sample), and Baturraaden (2 samples) for
geochemical analysis. Cl-SO4-HCO3 ternary diagram was used to distinguish hot water types. Cl-Li-B ternary diagram was used for hot water
source determination. Na-K-Mg ternary diagram was used for water rock reaction interpretation. Based on the hot water geochemical
analysis, Mount Slamet discharges bicarbonate waters in Guci, Baturraden, and Kalipedes. Those water discharge from 2 different sources
atKalipedes (older hydrothermal system) and Guci-Baturraden (younger geothermal system). Interpretation of permeable zone in the study
area was carried out by combining hot water geochemical analysis, morphological analysis, and Radon measurement. Two permeable zones
of Guci and Kalipedes were detected.
Keywords : hot water geochemistry, geothermal system of Mount Slamet, permeable zone
CODE : C24
Application of Geochemical Methods in Geothermal Exploration in Indonesia: a Literature Review (Part 1)
Anggita Agustin , Dasapta Erwin Irawan , Arif Susanto , and Rina Herdianita
Groundwater Engineering Master Program, Faculty of Earth Sciences and Technology, ITB
Research Group on Applied Geology
Research Group on Geology
Faculty of Earth Sciences and Technology, Institut Teknologi Bandung,
Jl. Ganesha No. 10, 40132 Bandung, Indonesia
[email protected] ; [email protected]
A literature review has been composed to look for potential future topics and approaches in geochemical application in geothermal
exploration, using online databases: Google Scholar, Scopus, and GRC library. Three sets of search terms have been used in the search. As
many as 298 relevant documents in form of conference abstracts, proceedings, and journal papers have been selected from a total of 522
documents of geothermal of Indonesia, using the following criteria: the availability of pdf, full paper, and data set. Based on the evaluation,
we can draw some points. Geochemical has been used in Kamojang field to identify geothermal system since 1975. Since then many
published works were working on the fluid behaviour and geotermometry. Kamojang field were the most published geothermal site in
Indonesia 65 papers, followed by Darajat field, 36 papers and Karaha field, 31 papers. Compared to other geothermal-rich countries,
geothermal publications in Indonesia is still low, due to the high confidentiality of the data set. Increasing the number of open data could
increase the number of scholarly works, that at the end could add some new knowledge about the system. We propose the following terms
as the future topics: Boron, Lithium, and Mercury (and other trace elements) cycle, stable isotope, and rare earth elements (REE). We also
recommend to maximize the use of multivariate statistics (cluster, PCA, multiple regression, RandomForest). Utilization of open source apps,
eg: R, Python, Orange Data Mining, is also part of our recommendation.
Indonesia, geochemistry
CODE: :Geothermal,
Spatial Association of Geological Features with Geothermal Producing Wells; A Literature Review from Geothermal Field in Indonesia
, A. Prihadi and H.H. Wibowo
Geothermal Master Study Program, Faculty of Petroleum and Mining (FTTM),
Applied Geology Research Division, Geology Study Program, Faculty of Earth Science and Technology
Institut Teknologi Bandung, Jl. Ganesha 10 Bandung 40132, Indonesia
[email protected]
The success of geothermal drilling in particular at the exploration of high enthalpy geothermal system is significantly controlled by the
success to locate an area of high permeability with sufficient fluid flow and high temperature within economically drilling depth. This area is
often associated with upflow zone. However, finding this target is not always easy when the existence of geological features that indicates
this target is absent or subtle. The features that often used to indicates this area are structural geology, such as fault, fracture and contact
lithology; surface manifestations such as crater, fumaroles, solfataras, steam vents in general, steaming ground, acid sulphate hot springs or
acid pools, boiling chloride springs or pool. The distribution of these surface manifestation is controlled by the type of geothermal system,
thus surface manifestation that occur in a geothermal area are not always the same in the other area.
This paper presents the analysis of the spatial association between these features and the geothermal drilling that successfully producing.
The study is literature review from some geothermal fields that have been drilled in Indonesia. The analyses consist of qualitative assessment
that is the relation of success well and the presence of any geological features and the quantitative assessment that is the distance between
the geological features and the success well.
The results shows that the drillings that are located within radius of horizontal distance <1000 m from fumaroles or solfataras are mostly
success. Whereas the geothermal system that is associated with caldera with absence of post volcanic activity within the caldera, the
geothermal well that have highly success is mostly located in the vicinity of caldera rim structure. The narrow zone along this structure has
width about <500 m from the rim toward inside of the caldera. The presence of post caldera volcanism show different result, where the
drilling success are mostly associated with the younger volcanism. A more detail study by integrating geophysical data is required for better
spatial analysis. The result from this study will be used for spatial analysis study using GIS which is later may help in well targeting.
Keywords : Spatial analysis, geothermal well, geological features, surface manifestation, drilling success, well targeting
CODE : R26
Mapping of Magnetic Anomaly Zone to Identification Heat Source of Hot Spring Manifestation in Desa Pinaras Tomohon North Sulawesi
Donny R. Wenas, Cyrke A. N. Bujung
Physics Department FMIPA Manado State University
e-mail: [email protected], [email protected]
The existing of several active volcanoes around the Tomohon City indicates occurrences of geothermal resources in the subsurface. This has
been proven by the existence of geothermal resources of Lahendong and Tompaso prospect. Geothermal manifestation hot springs appear in
several places that are relatively distance from geothermal sources for example in Desa Pinaras. Measurement of the magnetic method
showed negative magnetic anomaly in this area that is -100 to -105 nT. The mapping of magnetic anomalies indicates that the locations of
the hot springs of Desa Pinaras are in the anomalous zones with Lahendong geothermal resources. This gives an indication that the heat flow
is derived from Lahendong geothermal sources.
Keywords : magnetic method, geothermal, magnetic anomaly
CODE : R27
Comparison Geothermal Potential on Mount Kendeng and Mount Patuha Base on Vulcanostratigraphic Study
Chikal Rakhmatan, Ryan Hidayat, Damar Nandiwardhana
Master Program of Geothermal Technology
Faculty of Mining and Petroleum Engineering
Bandung Institute of Technology, Jl. Ganesha 10 Bandung 40132, Indonesia
[email protected] ; [email protected] ; [email protected]
Vulcanostratigraphic mapping is one of the reconnaissance exploration survey methods in volcanic geothermal system which aims to
distinguish different products based on their volcanic eruption centers. However, a difficulty may arise when using this method because the
products that are produced from different volcanic eruption centers are able to have nearly identical physical characteristics on the field.In
this research,the volcanicstratigraphic studyconducted in Ciwidey, West Java, itis used to assess the geothermal prospects Mount Kendeng
with co mparisons against Mount Patuha that has already been produced electricity. The methodology of this research refers to the concept
of geothermal exploration made by Wohletz (1992). The Interpretation of detailed topographic map on the scale of 1: 50,000 found that
there are 5 Khuluk units which are Khuluk Padang, Khuluk Patuha, Khuluk Rancabali, Khuluk Ciwide and Khuluk Kendeng, as well as 12 Gumuk
units which are Gumuk Rancabali, Gumuk Ciwidey, Gumuk Prug, Gumuk Kunti, Gumuk Putri, Gumuk Tambagruyeng, Gumuk Kutalak , Gumuk
Tikukur, Gumuk Cadas, Gumuk Wayang, Gumuk Tilu, Gumuk Cadaspanjang and Gumuk Masigit. Volume of Mount Kendeng is 137.9 km3 with
heat stored energy 2.1 x 1018 Joules and volume of Mount Patuha is 61.5 km3 with heat stored energy 1.8 x 1017 Joules. Based on the
comparison of volume and heat stored energy between Mount Kendeng and Mount Patuha, Mount Kendeng has more geothermal potential
prospects than Mount Patuha.
Keyword : Vulcanostratigraphic, Khuluk and Gumuk
CODE : R28
Volcanostratigraphy Studies and Its Implications of Geothermal System Based on Topographic Map and SRTM (Shuttle Radar Topography
Mission) Map at Awibengkok-Salak Geothermal Field, West Java
M. Nurwahyudi Yulianto, Rizki Trisna Hutami, Fery Ismar Darajat
Postgraduate Program of Geothermal Engineering, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology, Jalan
Ganeca 10, Bandung, West Java, Indonesia
e-mail: [email protected]
A study of volcanostratigraphy is a method that were carried out in the early stage of geothermal exploration. Volcanostratigraphy analysis
with topographic maps will help the determination of a distribution, volume and source of volcanic products to provide a preliminary
description of the location with a potential of geothermal energy. This study was conducted in the Awibengkok-Salak geothermal field, West
Java. The aims of the study is to determine the geothermal potential around Awibengkok field that may be used as the target of future
development. Volcanostratigraphy studies done using topographic 1: 100,000 maps scale, 1: 50,000 map scale of and SRTM (Shuttle Radar
Topography Mission) map. Awibengkok-Salak area contains 3 khuluk units (same as formation unit in stratigraphy) which are Khuluk Cianten,
Khuluk Awibengkok and Khuluk Bengkok. Beside the units, there are also 8 units of gumuk; the Perbakti Gumuk, Endut Gumuk, Gagak
Gumuk, Kiaraberes Gumuk, Putri Gumuk, Pasir Batu Gumuk, Parabakti Gumuk dan Peleus Gumuk. Based on the analysis of the volume and
the age of volcanoes, the degree of evolution of the magma, the existence and the state of the surface manifestations of geothermal
systems, in addition to khuluk Awibengkok, khuluk Salak has a geothermal potential for further development. The state of geothermal in
khuluk Salak -which is submature in the verge of mature- and the active manifestation are the key factors this area has a great potential in
geothermal energy.
Keywords : volcanostratigraphy, topogographic maps, Awibengkok Khuluk, Salak Khuluk
CODE : R29
Collaboration Program on Geothermal District as Geothermal Diretct Use in Indonesia
Nursanty Elisabeth ; Ichwan Elfajrie ; Jooned Hendrasakti ; Tubagus Nugraha ; Imam Asmara
Institut Teknologi Bandung
Indonesia Geothermal Center of Excellence
Energy and MineralResource Agency of West Java Provincial Government, Indonesia
e-mail: [email protected]
Indonesia Geothermal Center of Excellence, Institut Teknologi Bandung (ITB) – GeoCAP and Energy and Mineral Resource Agency of West
Java Provincial Government collaborate to conduct Geothermal District program. The Geothermal District is an area that utilize geothermal
resource commercially using cascaded system in order to optimize utilization of low to medium enthalpy geothermal energy and to foster
development of a community around the geothermal field. The area and application of geothermal district selected by integrating
assessment of studies in several aspects such as resource, technology, social, economic, market and legal. Program planning in 2015
divided into four steps; lesson learned studies from successful and unsuccesssful story of direct use applications, data update for proposed
area of Geothermal District, area and applications determination of Geothermal District, and program socialization. The program
roadmap during 2016-2018 are construction and commercialization of Geothermal District, also the replication into another potential
Keywords : Geothermal District, direct use, cascaded system