ESTIMASI ZONA PROSPEK DAN CADANGAN GAS MULA-MULA BERDASARKAN INTERPRETASI LOG PADA SUMUR SA-001

ELBEES, GHIFFARI PARAMANTA (2023) ESTIMASI ZONA PROSPEK DAN CADANGAN GAS MULA-MULA BERDASARKAN INTERPRETASI LOG PADA SUMUR SA-001. Other thesis, UPN "Veteran" Yogyajarta.

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Abstract

vi
RINGKASAN
ESTIMASI ZONA PROSPEK DAN CADANGAN GAS MULA-
MULA BERDASARKAN INTERPRETASI LOG PADA SUMUR
SA-001
Sumur SA-001 Lapangan “LBS” terletak di Provinsi Sumatra Selatan yang
termasuk cekungan Sumatra Selatan. Pada lapangan “LBS” menembus formasi
produktif yaitu Formasi Air benakat dan Formasi Gumai yang memiliki batu pasir
yang mengandung glaukonit dan terdapat kandungan shale. Sumur SA-001
memiliki prospek yang baik dilihat dari uji test rate gas, sehingga diperlukan
penelitian lanjutan untuk mengestimasi zona prospek hidrokarbon dan jumlah
cadangan gas awal pada sumur SA-001.
Tahapan pengerjaan penelitian ini dimulai dari mempersiapkan data, melakukan
environmetals correction menggunakan chart schlumberger. Zona top dan bottom
zona prospek dengan analisa kualitatif dan memperkirakan fluida pengisi reservoir.
Sumur SA-001 memiliki nilai log resistivitas yang rendah interval antara 1-5ohm-
m, umumnya reservoir hidrokarbon memiliki nilai log resistivitas lebih dari 10ohm-
m. indikasi Sumur SA-001 merupakan low-resistivity reservoir yang disebabkan
kandungan glaukonit dan kandungan vitric tuff. Sumur SA-001 pada analisa
kuantitatif melalukan perhitungan pada volume shale, porositas, dan saturasi air.
Setelah itu dilakukan cut-off untuk mengeliminasi lapisan tidak produktif lalu
didapat reservoir lumping, dan pengerjaan akhir yaitu melakukan perhitungan
OGIP.
Sumur SA-001 dengan analisa kualitatif yang dilakukan terdapat 13 lapisan
prospek. Pada analisa kuantitatif dilakukan perhitungan volume shale
menggunakan gamma ray log, untuk perhitungan porositas menggunakan metode
log densitas berdasarkan validasi data core, dan penentuan saturasi air dengan
metode dual water. Langkah selanjutnya yaitu melakukan cut-off sehingga didapat
nilai cut-off Vshale sebesar 0.57, porositas sebesar 0.19, dan saturasi air sebesar
0.65. Sumur SA-001 nilai saturasi air tidak diperhitungkan karena Sumur SA-001
merupakan sumur gas. Langkah berikutnya yaitu reservoir lumping pada sumur SA-
001 didapat net pay sebesar 50.04 m. Langkah terakhir menentukan nilai OGIP
berdasarkan konsep well basis dan didapat nilai OGIP sebesar 215.06 BSCF.
Kata kunci:Zona Prospek, Log, Cut Off, OGIP.
vii
ABSTRACT
ESTIMATION OF ZONE PROSPECT AND ORIGINAL GAS IN-
PLACE BASED ON LOG INTERPRETATION AT SA-001 WELL.
Well SA-001 Field "LBS" is located in South Sumatra Province which is included
in the South Sumatra Basin. The "LBS" field has productive formations, the Air
Benakat Formation and the Gumai Formation which has sandstone containing
glauconite and contains shale. The SA-001 well is in exploratory status, so further
research is needed to estimate the hydrocarbon prospect zone and the amount of
original gas reserves in the SA-001 well.
The stages of this research work started from preparing the data, carrying out
environmental corrections using the Schlumberger chart. Determining the top and
bottom of the prospect zone by qualitative analysis and estimating the reservoir fill
fluid. The SA-001 well has a low resistivity log value between 1-5ohm-m, generally
for hydrocarbon reservoirs it has a resistivity log value of more than 10ohm-m.
Indications The SA-001 well is a low-resistivity reservoir due to its glauconite
content and vitric tuff content. Then in the quantitative analysis, the shale volume,
porosity, and water saturation are calculated. After that, a cut-off was carried out
to eliminate the unproductive layer and then a lumping reservoir was obtained, and
the final work was to calculate the OGIP.
From the qualitative analysis conducted there are 13 layers of prospects. In the
quantitative analysis, shale volume calculations were performed using gamma ray
logs, for porosity calculations using the density log method based on core data
validation, and water saturation determination using the dual water method. The
next step is to cut-off so that the Vshale cut-off value is 0.57 and the porosity is 0.19
and water saturation is 0.65. While the water saturation value is not taken into
account because SA-001 Well is a gas well. The next step is reservoir lumping in
the SA-001 well to obtain a net pay of 50.04 m. The final step is to determine the
original gas in-place value based on the well basis concept and obtain an OGIP
value of 215.06 BSCF.
Keywords:Interest Zone, Log, OGIP, Cut Off

Item Type: Thesis (Other)
Uncontrolled Keywords: Interest Zone, Log, OGIP, Cut Off
Subjects: T Technology > T Technology (General)
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Eko Yuli
Date Deposited: 26 Sep 2023 01:34
Last Modified: 26 Sep 2023 01:34
URI: http://eprints.upnyk.ac.id/id/eprint/37694

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