Adila, Jifa (2025) Pemodelan Porositas Total Menggunakan Pre-Stack Inversion dan Seismic Multi-Attribute Untuk Identifikasi Zona Upside Potential Pada Reservoir Karbonat Formasi Tuban. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Sebuah reservoir karbonat pada lapangan JTK direncanakan untuk dikembangkan. Struktur Lapangan “JTK” ditemukan pada tahun 2001 dan mulai produksi pada tahun 2004. Sampai tahun 2020, jumlah sumur yang dibor terdapat 37 sumur dengan 29 sumur produksi, 1 sumur injeksi, 3 sumur konversi injeksi. Lapangan ini memiliki reserve yang cukup besar dengan recovery factor (RF) 40.4%. Dengan nilai recovery factor (RF) tersebut, lapangan ini masih menunjukan potensi yang signifikan untuk dikembangkan, terutama dengan melakukan pencarian zona upside potential untuk meningkatkan efisiensi produksi. Upaya tersebut dapat dilakukan dengan melakukan pemodelan porositas total dengan metode pre-stack inversion dan multi-attribute seismic. Hasil sensitivitas parameter elastis tidak menunjukkan sensitivitas terhadap lithoclass, hal ini mengindikasikan bahwa parameter elastis kurang efektif dalam mengidentifikasi fluida. Untuk itu, dilakukan analisis sensitivitas terhadap parameter P-impedance, S-impedance, dan Density terhadap porositas, hasil analisis menunjukkan bahwa area carbonate porous memiliki nilai P-impedance < 11.000 (m/s)*(g/cc), S-impedance < 5.900 (m/s)*(g/cc), dan Density < 2,45 g/cc. Area carbonate build-up berada dalam rentang carbonate porous dengan porositas 10-30%. Peta sebaran porositas total menunjukkan tiga area dengan potensi tinggi, yaitu potential 1 di area north-west, serta potential 2 dan potential 3 di area north-east. Integrasi hasil juga dilakukan secara kuantitatif dengan blindwell test yang menunjukkan korelasi 50% dan secara kualitatif dengan quick look triple combo log. Hasil menunjukan porositas di bagian utara lebih tinggi dibandingkan bagian selatan. Berdasarkan analisis yang telah dilakukan, diusulkan 2 sumur pengembangan pada area potential 1 dan area potential 3 dengan porositas 27-30% dan oil water contact (OWC) pada 1780 TWT.======================A carbonate reservoir in the JTK field is planned for development. The structure of the JTK field was discovered in 2001 and started production in 2004. As of 2020, a total of 37 wells have been drilled, with 29 production wells, 1 injection well, and 3 conversion injection wells. The field has a substantial reserve with a recovery factor (RF) of 40.4%. Given this recovery factor, the field still shows significant potential for further development, particularly through the identification of upside potential zones to enhance production efficiency. This can be achieved by modeling total porosity using Pre-Stack Inversion and Multi-Attribute Seismic methods. The sensitivity analysis of elastic parameters showed no sensitivity to lithoclass, indicating that elastic parameters are less effective in identifying fluids. Therefore, sensitivity analysis was conducted on the P-impedance, S-impedance, and Density parameters relative to porosity. The analysis showed that the carbonate porous area has a P-impedance value of < 11,000 (m/s)(g/cc), S-impedance < 5,900 (m/s)(g/cc), and Density < 2.45 g/cc. The carbonate build-up area falls within the carbonate porous range with porosity values of 10-30%. The total porosity distribution map identified three high-potential areas: potential 1 in the northwest, and potential 2 and potential 3 in the northeast. Results integration was also carried out both quantitatively using a blindwell test, which showed a 50% correlation and qualitatively using a quick look triple combo log. Porosity in the northern part is higher than in the southern part. Based on the analysis, two development wells are proposed for potential 1 and potential 3 areas, with porosity values of 27-30% and oil-water contact (OWC)at 1780 TWT.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Cekungan Jawa Timur Utara, Inversi Pre-stack, Multi-Attribute Seismic, Parameter Elastis, Porositas Total, Upside Potential, Pre-Stack Inversion, Multi-Attribute Seismic, North-East Java Basin, Elastic Parameter, Total Porosity, Upside Potential |
| Subjects: | Q Science > QE Geology > QE539.2 Seismic traveltime inversion Q Science > QE Geology > QE539.2.S4 Seismic models |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geophysics Engineering > 33201-(S1) Undergraduate Thesis |
| Depositing User: | Jifa Adila |
| Date Deposited: | 01 Aug 2025 06:23 |
| Last Modified: | 01 Aug 2025 06:23 |
| URI: | http://repository.its.ac.id/id/eprint/124727 |
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