WISMASANTI, MARIA NURMALITA (2025) DELINEASI ZONA PROSPEK GEOTHERMAL BERDASARKAN MODEL INVERSI 2D DATA MAGNETOTELLURIK PADA LAPANGAN GEOTHERMAL “QUARTER”, JAWA BARAT. Skripsi thesis, UPN Veteran Yogyakarta.
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Abstract
ABSTRAK
DELINEASI ZONA PROSPEK GEOTHERMAL BERDASARKAN
MODEL INVERSI 2D DATA MAGNETOTELLURIK PADA
LAPANGAN GEOTHERMAL “QUARTER”, JAWA BARAT
Oleh
Maria Nurmalita Wismasanti
NIM : 115210016
Program Studi Sarjana Teknik Geofisika
Lapangan panas bumi “Quarter” yang terletak di Jawa Barat merupakan daerah yang
mempunyai karakter sistem panas bumi vulkanik muda yang berpotensi untuk dikembangkan
menjadi energi terbarukan. Eksplorasi untuk mengetahui kondisi bawah permukaan penting
dilakukan untuk mengetahui zona yang menjadi prospek lanjutan. Penelitian menggunakan
metode magnetotellurik (MT) sounding untuk mencitrakan nilai konduktivitas/resistivitas di
bawah permukaan berdasarkan respon medan elektromagnetik. Hasil analisis dari pemodelan
inversi 2D digunakan untuk memodelkan ketebalan dan kedalaman dari komponen sistem
panas bumi. Berdasarkan analisis model 2D dari 13 titik dan 3 penampang, diinterpretasikan
komponen sistem panas bumi berupa caprock yang konduktif dengan nilai resistivitas (4-10
Ωm) dengan tebal 1000-2250 m. Batuan reservoir bernilai resistivitas (11-33 Ωm) dengan tebal
reservoir adalah 1000-300-m. Indikasi sumber panas diperkirakan dengan nilai resistivitas (34
161 Ωm) di bawah. Lapisan permukaan yang tidak teralterasi bernilai resistivitas (11-161 Ωm).
Kedalaman Top of Reservoir diperkirakan pada 0 hingga -500 masl. Kedalaman dan ketebalan
lapisan bervariasi yang mengindikasikan letak zona prospek yang berada pada zona upflow.
Kata kunci : Geothermal, Inversi, Magnetotellurik, Prospek, Resistivitas.
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ABSTRACT
DELINATION OF GEOTHERMAL PROSPECT ZONE BASED ON 2D
INVERSION MAGNETOTELLURIC DATA AT “QUARTER”
GEOTHERMAL FIELD, WEST JAVA
By
Maria Nurmalita Wismasanti
NIM : 115210016
Geophysical Engineering Undergraduate Program
The “Quarter” geothermal field, located in West Java, is a region characterized by a young
volcanic geothermal system with potential for development into a renewable energy source.
Exploration to understand subsurface conditions is essential to identify zones with further
prospect potential. This study uses the magnetotelluric (MT) sounding method to image
subsurface conductivity/resistivity values based on electromagnetic field responses. The results
from 2D inversion modeling are used to estimate the thickness and depth of geothermal system
components. Based on 2D model analysis from 13 stations and 3 cross-sections, the geothermal
system components are interpreted as follows: a conductive caprock layer with resistivity
values of 4–10 Ωm and thicknesses ranging from 1000 to 2250 m; a reservoir rock layer with
resistivity values of 11–33 Ωm and thicknesses between 300 and 1000 m; and a heat source
indicated by resistivity values of 34–161 Ωm beneath the reservoir. The unaltered surface layer
shows resistivity values of 11–161 Ωm. The top of the reservoir is estimated to be at elevations
between 0 and -500 meters above sea level (masl). Variations in layer depth and thickness
indicate that the prospective zone is located within the upflow area.
Keywords: Geothermal, Inversion, Magnetotelluric, Prospect, Resistivity.
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| Item Type: | Tugas Akhir (Skripsi) |
|---|---|
| Uncontrolled Keywords: | Geothermal, Inversion, Magnetotelluric, Prospect, Resistivity. |
| Subjek: | Q Science > QE Geology |
| Divisions: | Fakultas Teknologi Mineral dan Energi > (S1) Teknik Geofisika |
| Depositing User: | Eko Yuli |
| Date Deposited: | 09 Oct 2025 06:19 |
| Last Modified: | 09 Oct 2025 06:19 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/44168 |
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