Tsuraya, Arsylla (2025) Aplikasi Inversi Impedansi Akustik Untuk Memetakan Distribusi Reservoir Hidrokarbon Pada Lapangan ”SYL”, Cekungan Jawa Barat Utara, Indonesia. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini bertujuan untuk mengkarakterisasi reservoir karbonat di Lapangan “SYL”, Formasi Cibulakan Atas, menggunakan metode inversi impedansi akustik berbasis model (model-based inversion). Metode ini dipilih karena mampu meningkatkan resolusi vertikal dan menghasilkan estimasi sifat fisik batuan secara kuantitatif. Proses inversi dilakukan dengan mengintegrasikan data seismik 3D post-stack, data log dari delapan sumur, serta interpretasi geologi. Hasil menunjukkan zona reservoir utama berada pada struktur karbonat bertipe build-up dengan nilai impedansi akustik tinggi (6.000–15.000 ft/s·gr/cc), densitas <2,45 g/cc, dan gamma ray <44 API, yang mengindikasikan litologi batugamping berpori tinggi. Dua zona prospektif (Potential 1 dan 2) berhasil diidentifikasi melalui peta slicing AI dan crossplot sensitivitas multi-sumur yang konsisten antara horizon Top MMC hingga Base MMC. Zona upside potential berada pada bagian utara struktur, dikontrol oleh litologi dan deposisi karbonat, serta berasosiasi dengan jebakan struktural berupa antiklin dan sesar normal. Metode inversi yang digunakan menunjukkan korelasi tinggi dan error rendah saat dikalibrasi dengan data log, sehingga hasil studi ini diharapkan dapat mendukung strategi pengembangan Lapangan “SYL” secara lebih efisien dan ekonomis.
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This study aims to characterize the carbonate reservoir in the “SYL” Field, Cibulakan Formation, using model-based acoustic impedance inversion. This method was chosen for its ability to enhance vertical resolution and provide quantitative estimates of rock physical properties. The inversion process integrates 3D post-stack seismic data, well logs from eight wells, and geological interpretation. The results indicate that the main reservoir zone is located
within a carbonate build-up structure, characterized by high acoustic impedance values (6,000–15,000 ft/s·gr/cc), density <2.45 g/cc, and gamma ray <44 API, which indicates porous limestone lithology. Two prospective zones (Potential 1 and 2) were identified through AI slicing maps and multi-well sensitivity crossplots, consistently observed between the Top MMC and Base MMC horizons. The upside potential zone is located in the northern part of the structure, controlled by lithology and carbonate deposition, and associated with structural traps such as anticlines and normal faults. The applied inversion method demonstrates high correlation and low error when calibrated with well log data, thus this study is expected to support a more efficient and economic development strategy for the “SYL” Field.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Inversi Seismik, Inversi Impedansi Akustik, Potensi Hidrokarbon |
| Subjects: | Q Science > QE Geology > QE538.5 Seismic tomography; Seismic waves. Elastic waves 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: | Arsylla Anggi Tsuraya |
| Date Deposited: | 31 Jul 2025 09:11 |
| Last Modified: | 31 Jul 2025 09:11 |
| URI: | http://repository.its.ac.id/id/eprint/124276 |
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