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All Journal LEMBARAN PUBLIKASI MINYAK DAN GAS BUMI Scientific Contributions Oil and Gas
Herru Lastiadi Setiawan
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Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Environmental Science

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PEMANFAATAN METODE MULTISPEKTRAL UNTUK IDENTIFIKASI LITOLOGI PADA EKSPLORASI MIGAS. Yudi Kuntoro; Tri Mudji Susantoro; Herru Lastiadi Setiawan; Nurus Firdaus; Panuju; Epo Prasetya Kusumah
Lembaran Publikasi Minyak dan Gas Bumi Vol. 54 No. 1 (2020): LPMGB
Publisher : BBPMGB LEMIGAS

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Abstract

Penelitian ini dilatarbelakangi oleh tidak terjangkaunya beberapa titik penting pada saat melaksanakan survei geologi karena faktor topografi atau faktor lain. Titik penting itu berupa singkapan batuan, maupun rembesan migas. Penelitian ini mengusulkan penggunaan sensor multispektral yang dimobilisasi menggunakan drone untuk membantu menjangkau semua titik dan meningkatkan efektivitas dan efisiensi survei. Penelitian ini dibangun dari hipotesis bahwa setiap manifestasi geologi akan mempunyai spektrum yang unik. Kegiatan penelitian ini mencakup perekaman spektrum sampel batuan referensi dan perekaman di lapangan (daerah aliran sungai Cipamingkis, Kabupaten Bogor). Hasil perekaman menunjukkan sebanyak 12 dari 14 sampel batupasir menghasilkan kurva berbentuk seperti huruf M, di mana band-2 dan band-4 mempunyai nilai lebih tinggi dibanding band lain. Enam sampel batulempung menunjukkan spektrum dengan puncak reflektansi pada band-4. Empat sampel batugamping memberikan spektrum dengan puncak pada band-2. Dua sampel batuserpih membentuk kurva menyerupai batulempung, sedangkan dua sampel lainnya mempunyai kurva menurun dari band-1 ke band-5. Dua sampel batubara mempunyai bentuk spektrum identik. Terakhir, 5 dari 6 sampel batuan beku menghasilkan bentuk kurva dengan puncak tertinggi pada band-2 dan terendah pada band-4. Hasil perekaman batuan referensi menunjukkan konsistensi data hingga 87,5% dan dari kegiatan ini dapat disimpulkan bahwa metode multispektral dapat digunakan untuk menidentifikasi manifestasi geologi.
A Preliminary Study on Heavy Oil Location in Central Sumatra using Remote Sensing and Geographic Information Sytem Suliantara Suliantara; Tri Muji Susantoro; Herru Lastiadi Setiawan; Nurus Firdaus
Scientific Contributions Oil and Gas Vol 44 No 1 (2021)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.44.1.489

Abstract

Heavy oil which is classifi ed as non conventional oil is the target of exploration in the world. In Indonesia, the potential for heavy oil exploration is quite large, especially in the Central Sumatra basin. This study aims to map the location of potential heavy oil based on remote sensing data and regional gravity data supported by a geographic information system. Landsat 8 OLI satellite data is processed to produce 567 (RGB) color composite images, then further processing is carried out with DEM data to produce fusion images; mapping the vegetation index, clay mineral index, iron oxide index, surface temperature. The gravity data is used for mapping subsurface geological structures. Overlay analysis is carried out on the results of remote sensing data processing and interpretation of surface and subsurface geology. Based on the analysis, it shows that heavy oil fi elds are generally found on the surface and subsurface structures which are relatively identical and located on the edge of the basement high. Based on this analysis, the locations that have the potential for heavy oil and gas traps are on the northeast edge, Dalu-dalu High, the edge of Kampar High, the west edge of Kuantan High, the southwest edge of the Beruk High, the southwest edge of the Sembilan High.
Relationship Between Tectonic Evolutions and Presence of Heavy Oil in The Central Sumatra Basin Herru Lastiadi Setiawan; Suliantara Suliantara; Bambang Widarsono
Scientific Contributions Oil and Gas Vol 44 No 1 (2021)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.44.1.492

Abstract

Heavy oil is formed through biodegradation process of hydrocarbons, as well as water washing, in which light hydrocarbon fraction disappears and leaves the heavy fraction. Heavy oil is essentially an asphaltic, dense (low API gravity), and viscous that is chemically characterized by its high content of asphaltenes in the oil. Although variously defi ned, 25o API is set the upper limit for heavy oil. Heavy oil in the Central Sumatra Basin is evidently formed as a result of biodegradation and water washing (a hydrodynamic process within oil reservoir) mechanisms. These processes occur as result of tectonic uplift of the reservoir after it has been fi lled with hydrocarbons. Heavy oil reservoir depths in the Central Sumatra Basin are generally shallower than 1,000 feet (300-400 meters), at which surface water may may be associated with the reservoir hence enabling the heavy oil transformation. A combined geology, remote sensing/geographic information system ( GIS), geophysics, stratigraphy, and wellbased analyses is utilized to serve the study. It has been observed that within the northern part of the basin, heavy oil is mainly found in fi elds located within uphill fault blocks such as the up-thrown part of the Sebanga thrust fault with its Duri, Sebanga North, Kulin, Rantau Bais, Batang, Akar, and Genting fi elds. In the western part of the basin there are the Kumis, Kotalama and Pendalian heavy oil fi elds associated with Dalu-Dalu thrust fault and Gadang Island uplift. In total 51 fi elds/structures containing or suspected to contain heavy oil are associated with uplifted geological positions, hence showing the strong relations between tectonic evolutions and present day presence of heavy oil within the basin.
An Integrated Approach for Revisiting Basin-Scale Heavy Oil Potential of The Central Sumatera Basin Bambang Widarsono; Herru Lastiadi Setiawan; Tri Muji Susantoro; Suliantara Suliantara; Jonathan Setyoko Hadimuljono; Desi Yensusminar; Julikah Julikah; Ongki Ari Prayoga
Scientific Contributions Oil and Gas Vol 44 No 1 (2021)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.44.1.493

Abstract

Central Sumatra Basin is one of the most prolifi c hydrocarbon basins in Indonesia and has proved itself as being the largest contributor to Indonesia’s national crude oil production. Heavy oil fi elds in the basin, such Duri fi eld as the largest one, plays a very important role in making up the basin’s whole oil production output. In general, the Central Sumatra Basin is also acknowledged for its heavy oil potential. Accordingly, a study under the auspices of the Ministry of Energy and Mineral Resources (MEMR) of the Republic of Indonesia is carried out to re-visit the potential. The study establishes and implements an integrated approach formed by a combined macro and micro analyses. In the macro analysis, a combined evaluations of regional geology, geophysics, geochemistry, remote sensing/geographic information system ( GIS), regional geothermal study, and fi eld survey/ microbiology is performed to identify geological positions of the heavy oil potential. In the micro analysis, on the other hand, qualitative and quantitative well-log analyses supported by well-test and laboratory measurement data on the identifi ed geological positions are carried out with an aim of identifying heavy oil bearing reservoirs/traps under three categories of certainty. The main result of the study is identifi cation of 51 fi elds/structures - producing and non-producing – that bears heavy oil within the three categories. Findings of the study can certainly be used as a prerequisite for more intensive and expansive studies to meet the need for a more solid conclusion regarding the heavy oil potential of the Central Sumatra Basin.
Co-Authors Adis Jayati Agung Budi Harto Ahmat Maryanto Bambang Widarsono Danang Surya Candra Desi Yensusminar Epo Prasetya Kusumah Gatot Nugroho Jonathan Setyoko Hadimuljono Julikah Julikah Julikah Kurdianto M Rokhis Khomarudin Nurus Firdaus Ongki Ari Prayoga Panuju Rahmat Arief Sayidah Sulma Suliantara Suliantara Suliantara Tri Mudji Susantoro Tri Muji Susantoro Yohanes Fridolin Hestrio Yudi Kuntoro