Barus, Maria Threecia Beru (2025) Identifikasi Lingkungan Pengendapan Dan Persebaran Porositas Pada Channel System Menggunakan Analisis Multi-Attribute Dan Inversi Seismik Pada Lapangan “MTC”, Cekungan Sumatra Selatan. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Cekungan Sumatra Selatan merupakan salah satu wilayah penghasil hidrokarbon terbesar di Indonesia, dengan sejarah eksplorasi yang telah dimulai sejak awal tahun 1900-an. Hingga kini, lebih dari 300 lapangan minyak dan gas telah berhasil ditemukan di daerah tersebut. Namun demikian, kegiatan eksplorasi di cekungan ini menghadapi berbagai tantangan, termasuk kompleksitas geologi, keterbatasan ketersediaan data, serta heterogenitas tingkat kematangan hidrokarbon. Tantangan tersebut juga terjadi di Lapangan "MTC" di Formasi Muara Enim, yang memiliki reservoir batupasir pada kedalaman dangkal dan, menawarkan potensi signifikan dengan biaya eksplorasi yang lebih rendah. Penelitian ini bertujuan untuk menganalisis lingkungan pengendapan, mengidentifikasi properti reservoir berupa impedansi akustik dan porositas menggunakan metode inversi seismik serta multi-attribute, dan menentukan lokasi pengembangan sumur eksplorasi baru di lapangan tersebut. Hasil analisis menunjukkan bahwa lingkungan pengendapan Formasi Muara Enim di Lapangan "MTC" berada pada zona transitional lower delta plain, dengan fitur geologi seperti crevasse splay, oxbow lakes, delta plain, dan delta front. Properti reservoir memiliki rentang impedansi akustik 3900–4800 g/m2s dan porositas 10–15%, dengan korelasi tinggi (R=0,99) antara hasil inversi dan distribusi porositas. Tiga area prospek utama diidentifikasi untuk pengembangan sumur, yaitu Area Potensial 1 di lingkungan river (porositas 10–13%), Area Potensial 2 di lingkungan crevasse splay (porositas 12–15%), dan Area Potensial 3 di lingkungan mouth bar (porositas 13–15%).
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The South Sumatra Basin is one of Indonesia's largest hydrocarbon-producing regions, with exploration activities dating back to the early 1900s. To date, more than 300 oil and gas fields have been discovered in the area. However, exploration efforts face several challenges, including geological complexity, limited data availability, and variations in hydrocarbon maturity levels. The "MTC" field in the Muara Enim Formation, characterized by shallow sandstone reservoirs, offers significant potential with relatively low exploration costs. This study aims to analyze the depositional environment, evaluate reservoir properties such as acoustic impedance and porosity using seismic inversion and multi-attribute methods, and identify locations for new exploration well development. The analysis indicates that the Muara Enim Formation in the "MTC" field lies within a transitional lower delta plain environment, featuring geological elements such as crevasse splays, oxbow lakes, delta plains, and delta fronts. Reservoir properties exhibit an acoustic impedance range of 3900–4800 g/m2 s and porosity values of 10–15%, with a strong correlation (R = 0.99) between inversion results and porosity distribution. Three primary prospective areas are identified for well development: Potential Area 1 within a river environment (porosity 10–13%), Potential Area 2 within a crevasse splay environment (porosity 12–15%), and Potential Area 3 within a mouth bar environment (porosity 13–15%).
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Cekungan Sumatra Selatan, Inversi Impedansi Akustik, Lingkungan Pengendapan, Porositas, Multi-attribute |
| Subjects: | Q Science > QE Geology > QE539.2 Seismic traveltime inversion Q Science > QE Geology > QE601 Geology, Structural |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geophysics Engineering > 33201-(S1) Undergraduate Thesis |
| Depositing User: | Maria Threecia Beru Barus |
| Date Deposited: | 19 Feb 2025 01:32 |
| Last Modified: | 19 Feb 2025 01:32 |
| URI: | http://repository.its.ac.id/id/eprint/118767 |
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