PENENTUAN MODEL KONSEPTUAL PANASBUMI WAYANG WINDU BERDASARKAN ANALISIS DATA CONTROL SOURCE AUDIO MAGNETOTELLURIC (CSAMT), DAN GRAVITASI

FATHURAHMAN, MUHAMMAD FAHMI (2022) PENENTUAN MODEL KONSEPTUAL PANASBUMI WAYANG WINDU BERDASARKAN ANALISIS DATA CONTROL SOURCE AUDIO MAGNETOTELLURIC (CSAMT), DAN GRAVITASI. UNSPECIFIED thesis, UPN "Veteran" Yogyakarta.

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Abstract

ABSTRAK
MODEL KONSEPTUAL PANASBUMI WAYANG WINDU BERDASARKAN ANALISIS
DATA CONTROL SOURCE AUDIO MAGNETOTELLURIC (CSAMT), DAN GRAVITASI DI
KAWASAN PANGALENGAN, KABUPATEN BANDUNG, JAWA BARAT
Oleh:
Muhammad Fahmi Fathurahman
115170025
Berdasarkan survei pendahuluan yang dilakukan sejak 1960 di wilayah Indonesia
menunjukkan lebih dari 200 prospek panasbumi. Dengan cadangan panasbumi potensial sebesar
12.200 MW dan cadangan terbukti sebesar 2.000 MW, yang tersebar di 125 lokasi di Indonesia.
Salah satu WKP yang sudah beroperasi dan perlu pengembangan lebih lanjut yaitu lapangan
panasbumi Wayang Windu.
Penelitian ini dilakukan di lapangan panasbumi Wayang Windu dengan tujuan untuk
menentukan model konseptual panasbumi berdasarkan kontras nilai resistivitas batuan. Metode
yang cocok digunakan yaitu metode Control Source Audio Magnetotelluric (CSAMT) dan
Gravitasi. Dilakukan inversi 1D CSAMT dengan metode Bostick dan Occam, serta pseudosection
2D untuk mengetahui gambaran lapisan bawah permukaan. Filter derivative dan pemodelan 2,5 D
gravitasi menggambarkan pola dan gambaran patahan pada daerah penilitian.
Berdasarkan inversi 1D CSAMT diinterpretasikan nilai resistivitas kurang dari 10 ohm.m
sebagai claycap, nilai resistivitas 10-40 ohm.m diinterpretasikan sebagai zona reservoar. Korelasi
pseudosection 2D dengan pemodelan 2,5 D Gravitasi dapat menunjukan sebaran lapisan dan
struktur pada daerah penelitian. Model konseptual yang dibangun berdasarkan integrasi CSAMT,
Gravitasi dan data geologi dapat menggambarkan sistem panasbumi Wayang Windu berupa
overburden, claycap, reservoar, zona upflow, zona recharge, dan lapisan batuan.
Kata Kunci : CSAMT, filter derivative, Inversi Occam, panasbumi, Pemodelan 2,5 DABSTRACT
CONCEPTUAL MODEL OF WAYANG WINDU FIELD GEOTHERMAL SYSTEM BASED ON
DATA CONTROL SOURCE AUDIO MAGNETOTELLURIC (CSAMT) ANALYSIS, AND
GRAVITY IN PANGALENGAN AREA, BANDUNG, WEST JAVA
By:
Muhammad Fahmi Fathurahman
115170025
Based on a preliminary survey conducted since 1960 in Indonesia, it shows more than 200
geothermal prospects. With potential geothermal reserves of 12,200 MW and proven reserves of
2,000 MW, spread over 125 locations in Indonesia. One of the WKP that is already operating and
needs further development is the Wayang Windu geothermal field.
This research was conducted in the Wayang Windu geothermal field with the aim of
determining a conceptual geothermal model based on the contrasting rock resistivity values. The
suitable method used is the Control Source Audio Magnetotelluric (CSAMT) and Gravity method.
A 1D inversion of CSAMT was performed using the Bostick and Occam methods, as well as a 2D
pseudosection to determine the description of the subsurface layer. Derivative filter and 2.5 D
gravity modeling describe fault patterns and features in the study area.
Based on the CSAMT 1D inversion, resistivity values of less than 10 ohm.m are interpreted
as claycap, resistivity values of 10-40 ohm.m are interpreted as reservoir zones. The correlation
of 2D pseudosection with 2.5 D Gravity modeling can show the distribution of layers and
structures in the study area. The conceptual model built based on the integration of CSAMT,
gravity and geological data can describe the Wayang Windu geothermal system in the form of
overburden, claycap, reservoir, upflow zone, recharge zone, and rock layers.
Keywords : CSAMT, 2.5 D modeling, Occam inversion, derivative filter, geothermal

Item Type:	Thesis (UNSPECIFIED)
Uncontrolled Keywords:	CSAMT, filter derivative, Inversi Occam, panasbumi, Pemodelan 2,5 D
Subjects:	T Technology > T Technology (General)
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Eko Yuli
Date Deposited:	27 Jan 2022 04:02
Last Modified:	28 Nov 2022 08:51
URI:	http://eprints.upnyk.ac.id/id/eprint/27988

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