Aplikasi Inversi Impedansi Akustik Untuk Memprediksi Persebaran Reservoir Lapangan "Y"

Satriana, Desak Putu Mega Erlina Pratiwi (2023) Aplikasi Inversi Impedansi Akustik Untuk Memprediksi Persebaran Reservoir Lapangan "Y". Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Identifikasi persebaran reservoir yang akurat diperlukan agar dapat mengidentifikasi zona prospektif dan produktif. Salah satu cara untuk mengidentifikasi persebaran reservoir pada lapangan “Y” yaitu dengan metode inversi. Metode inversi yang digunakan dalam penelitian ini yaitu inversi impedansi akustik yang dapat diandalkan untuk mengkarakterisasi reservoir. Penelitian ini dilakukan dengan tujuan untuk mengetahui metode inversi impedansi akustik yang terbaik serta mengidentifikasi persebaran reservoir pada Lapangan “Y”. Pada penelitian ini terdapat 5 data sumur dan data seismik 3D PSTM. Metode analisis yang digunakan adalah melakukan perbandingan hasil penampang seismic dari 3 metode inversi seismik, yaitu Model based, Band-Limited, dan Sparse spike untuk mendapatkan lapisan prospek hidrokarbon. Penentuan inversi terbaik dilakukan berdasarkan nilai error terkecil. Setelah dilakukan perbandingan hasil penampang seismik dan pre-analisis inversi metode yang paling baik yaitu metode Model Based, karena hasil penampang yang mendukung serta nilai error yang kecil dan nilai korelasi yang baik. Nilai RMS error terkecil pada metode inversi model based yaitu 1944.97 (ft/s)*(g/cc). Diketahui reservoir pada Lapangan “Y” berupa batu pasir dengan nilai impedansi 24139 – 26722 (ft/s) * (g/cc) dengan nilai porositas 20 – 23 % serta kedalaman -935 – -950 m pada Top Bekasap serta kedalaman -1067 – -1078 m pada Bottom Bekasap.
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Identification of accurate reservoir distribution is necessary in order to identify prospective and productive zones. One way to identify the distribution of reservoirs in the "Y" field is the inversion method. The inversion method used in this study is acoustic impedance inversion which can be relied upon to characterize the reservoir. This research was conducted with the aim of knowing the best acoustic impedance inversion method and identifying the distribution of reservoirs in Field "Y". In this study there are 5 well data and PSTM 3D seismic data. The analytical method used is to compare the results of seismic cross-sections from 3 seismic inversion methods, namely Model based, Band-Limited, and Sparse spike to obtain a prospect layer of hydrocarbons. The best inversion is determined based on the smallest error value. After comparison of seismic cross-section results and pre-inversion analysis, the best method is the Model Based method, because the cross-section results are supportive and the error value is small and the correlation value is good. The smallest RMS error value in the model based inversion method is 1944.97 (ft/s)*(g/cc). It is known that the reservoir in Field "Y" is batupasirstone with an impedance value of 24139 – 26722 (ft/s) * (g/cc) with a porosity value of 20 – 23% and a depth of -935 – -950 m at the Top Bekasap and a depth of -1067 – -1078 m at the Bottom Bekasap

Item Type:	Thesis (Other)
Uncontrolled Keywords:	reservoir, seismic, acoustic impedance inversion, reservoir, seismik, inversi impedansi akustik
Subjects:	Q Science > QE Geology > QE539.2 Seismic traveltime inversion
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geophysics Engineering > 33201-(S1) Undergraduate Thesis
Depositing User:	Desak Putu Mega Erlina Pratiwi Satriana
Date Deposited:	04 Oct 2023 11:00
Last Modified:	04 Oct 2023 11:00
URI:	http://repository.its.ac.id/id/eprint/104371

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