Arphan, Frankstein (2020) Analisis Parameter Petrofisika Lapisan Thin Laminated Reservoir Menggunakan Metode Laminated Shally Sand Analysis (LSSA). Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Thin bed reservoir merupakan reservoir minyak dan gas yang terletak pada lapisan laminasi serpih dan pasir tipis yang memiliki ketebalan 0.08- 2 ft. Tingginya kandungan mineral lempung disertai dengan distribusi mineral lempung yang inheren mempengaruhi respon nilai gamma ray yang tinggi dan resistivitas yang rendah. Hal ini menyebabkan zona Thin Bed Reservoir seringkali diidentifikasi sebagai zona tidak berprospek. Sementara, 30 - 40% cadangan hidrokarbon berada pada lapisan thin bed yang masih belum termanfaatkan secara maksimal. Melihat permasalahan dan pentingnya pemanfaatan thin bed, digunakan metode Laminated Shaly Sand Analysis yang bertujuan untuk mendeteksi lapisan laminasi thin bed sehingga didapatkan nilai porositas, volume serpih, dan saturasi air. Metode LSSA memanfaatkan pemecahan log resistivitas menjadi log resistivitas vertikal yang dilanjutkan perhitungan nilai porositas menggunakan respon nilai gamma ray terhadap porositas menggunakan metode Thomas Steiber. Parameter saturasi didapatkan dengan menghitung parameter Qv dan parameter fisis reservoir dihitung menggunakan Monte Carlo Uncertainty Probabilistic untuk memberikan komparasi parameter fisis lapisan thin bed reservoir pada persebaran minimum, median dan maksimum. Didapatkan bahwa Laminated Shally Sand Analysis mampu meningkatkan nilai ketebalan net pay hingga 40.35%, meningkatkan angka porositas, mereduksi nilai shale volume, dan saturasi air pada lapisan thin bed reservoir pada kedalaman 2521.45-2543.45 ft untuk sumur SSK dan 4011.3834023.883 ft untuk sumur KMR. Selain itu, perbedaan hasil Laminated Shally Sand Analysis yang didapatkan pada kedua sumur didasarkan pada perbedaan nilai anisotropi yang memerlukan parameter shale volume dan distribusi shale sebagai penentu indikasi lapisan thin bed. ================================================================================================================================
Thin bed reservoir is an oil and gas reservoir which is located in a layer of shale and thin sand which has a thickness of 0.08-2 ft. The high content of clay minerals and the distribution of clay minerals influence the response of high gamma ray values and low resistivity. This causes the Thin Bed Reservoir zone is identified as a non-prospective zone. Meanwhile, 30-40% of hydrocarbon reserves are in the thin bed layer which is still not fully utilized. Seeing the problems and importance of the use of thin beds, the Laminated Shaly Sand Analysis method is used which aims to detect thin bed laminate layers to obtain porosity, shale volume, and water saturation values. The LSSA method utilizes the separation of resistivity log into a vertical resistivity log followed by the calculation of the porosity value using the gamma ray response value to the porosity using the Thomas Steiber method. Saturation parameters are obtained by calculating Qv parameters and physical reservoir parameters are calculated using Monte Carlo Uncertainty Probabilistic to provide a comparison of physical parameters of the thin bed reservoir layer at minimum, median and maximum distribution. It was found that Laminated Sand Analysis was able to increase thickness of net pay up to 40.35%, increase the value of porosity, reduce the value of shale volume, and air saturation of thin bed reservoir at the depth of 2521.45-2543.45 ft for Well SSK and 4011.383-4023.883 ft for Well KMR. In addition, differences in the results of Laminated Shally Sand Analysis between two wells are based on anisotropic values differences which require shale volume parameters and shale distribution to determine thin bed potential.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSGf 550 Arp a-1 2020 |
| Uncontrolled Keywords: | Laminated, Laminated Shally Sand Analysis, Thin Bed Reservoir |
| Subjects: | Q Science Q Science > QE Geology > QE471 Sedimentary rocks. Sedimentology |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geophysics Engineering > 33201-(S1) Undergraduate Thesis |
| Depositing User: | Frankstein Arphan |
| Date Deposited: | 10 Mar 2025 03:49 |
| Last Modified: | 10 Mar 2025 03:49 |
| URI: | http://repository.its.ac.id/id/eprint/74345 |
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