Hamdalah, Hafiz (2013) METODE CSAMT UNTUK PENENTUAN INDIKASI FLUIDA SECARA LANGSUNG DAN PREDIKSI WELL OUTPUT DI LAPANGAN PANAS BUMI WAYANG WINDU, KABUPATEN PANGALENGAN, JAWA BARAT. Skripsi thesis, UPN "Veteran" Yogyakarta.
Preview |
Text
2. ABSTRAK.pdf Download (135kB) | Preview |
Abstract
ABSTRAK
Survei geofisika menggunakan metode CSAMT untuk mengkarakterisasi sistem
panasbumi dengan tujuan mengindikasikan fluida panasbumi secara langsung
berdasarkan respon nilai resistivitas batuan di bawah permukaan, serta
mengkorelasikan terhadap data top of reservoir (TOR), top of epidote (TOE), dan
temperatur sumur. Dilakukan prediksi dari well output dari hubungan resistivitas
gradient (RG) dengan resist ivitas plume. Penelitian berlokasi di lapangan panasbumi
Wayang Windu, kabupaten Pangalengan, Jawa Barat.
Proses pengambilan data dilakukan bulan Oktober-Desember 2012 dengan mode
pengukuran skalar. dan tranverse magnetic (TM), jumlah titik pengukuran 251 titik,
spasi antar titik bervariasi yaitu 50 m dan 100 m. jarak (r) antara Tx dan Rx adalah 10
Km dari perhitungan skin depth dan near field. Pengambilan data menggunakan TXU
30 (transmitter), V8 -6R (receiver) serial 2126 (system 2000.net) keluaran Phoenix
Geophysics. Pengolahan data dengan bantuan Time Domain Electromagentic
(TDEM) dan slope resistivitas sebagai koreksi pergeseran statik. Data terkoreksi
dilakukan proses inversi 1D menggunakan inversi Bostick dan OCCAM. Penampang
2D CSAMT diperoleh dari hasil inversi 1D yang dilakukan gridding interpolasi.
Perangkat lunak yang digunakan adalah CMTPro, Ms. Excel, Interpex 1D, Global
Mapper, Petrel, Surfer, dan Map Info Prefessional.
Interpretasi dilakukan secara kualitatif dan kuantitatif berdasarkan pendekatan
konseptual dan deterministik. Nilai resistivitas batuan yaitu batuan reservoir ( >5 – 40
Ohm.m), clay cap (<5 Ohm.m), dan overburden layers (>40 Ohm.m). interpretasi 1D
didapatkan base of conductor (BOC) dengan kedalaman rata-rata 1000 msl dan
korelatif terhadap TOR sumur. Resistivitas rendah pada clay cap disebabkan alterasi
argilitik berupa mineral illite, smectite, dan kaolinite. Indikasi fluida secara langsung
merupakan respon resistivitas yang rendah (>5 – 10 Ohm.m) pada batuan reservoir.
Hubungan RG dan resistivitas plume dapat diklasifikasikan prediksi well output
produksi yaitu very high, high, low dan low -dry . Prediksi ini dapat mengurangi
resiko untuk pemboran sumur selanjutnya
Kata kunci : CSAMT, panasbumi, mode skalar, tranverse magnetic (TM) , resistivity
gradient. resistivtas plume, indikasi fluida, well output
ABSTRACT
Geophysiscal survey using CSAMT methods to characterize the geothermal system
with the aim of geothermal fluid directly indicated by the response of rock resistivity
values below the surface, and correlate the data to the top of the reservoir (TOR), top
of epidote (TOE), and temperature wells. Do predictions of the well output of
relations resistivity gradient (RG) with resistivity plume. Research located in
Wayang Windu geothermal field, Pangalengan regency, West Java.
The process of data acquisition was conducted from October to December 2012 with
scalar measurement mode. and tranverse magnetic (TM), the number of measurement
are 251 points, a point varies the spacing between 50 m and 100 m. distance (r)
between Tx and Rx is 10 Km from the calculation of the skin depth and the near field.
Data acquisition using the TXU 30 (transmitter), V8-6R (receiver) serial 2126
(2000.net system) outputting Phoenix Geophysics. Data processing with the help of
Time Domain Electromagentic (TDEM) and the slope of resistivity as a static shift
correction. Corrected data inversion process is carried out using the 1D Bostick and
Occam inversion. 2D sections obtained from the inversion of CSAMT 1D conducted
gridding interpolation. The software used is CMTPro, Ms. Excel, Interpex 1D,
Global Mapper, Petrel, Surfer, and Map Info Prefessional.
Interpretation is done qualitatively and quantitatively based conceptual approach
and deterministic. Value of rock resistivity are reservoir rock (> 5-40 Ohm.m), clay
cap (<5 Ohm.m), and overburden layers (> 40 Ohm.m). 1D interpretation of the
obtained base of conductor (BOC) with an average depth of 1000 msl and
correlative to the TOR well. Low resistivity clay cap on argilitik be caused alteration
minerals like illite, smectite, and kaolinite. Direct fluid indication is a low resistivity
response (> 5-10 Ohm.m) in the reservoir rock. RG relations and resistivity plume
can be classified prediction output production well is very high, high, low and lowdry. This prediction can reduce the risk for subsequent drilling
Keywords : CSAMT, geothermal, scalar mode, tranverse magnetic (TM) , resistivity
gradient. resistivity of plume, fluid indication, well output
| Item Type: | Tugas Akhir (Skripsi) |
|---|---|
| Subjek: | Q Science > QC Physics |
| Divisions: | Fakultas Ekonomi dan Bisnis > (S1) Akuntansi |
| Depositing User: | Ratna Sufiatin |
| Date Deposited: | 07 Oct 2016 03:56 |
| Last Modified: | 29 Jul 2025 07:13 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/7424 |
Actions (login required)
 |
View Item |