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All Journal Buletin Sumber Daya Geologi
Ibrahim, Muhammad Abdurachman
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Education Energy Engineering Environmental Science

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KARAKTERISTIK CLEAT TERHADAP PERMEABILITAS DAN KANDUNGAN GAS PADA BATUBARA ANGGOTA M3 FORMASI MUARAENIM DI DAERAH MANGUNJAYA, PROVINSI SUMATRA SELATAN: CLEAT CHARACTERIZATION ON PERMEABILITY AND GAS CONTENT IN M3 MEMBERS OF MUARAENIM FORMATION AT MANGUNJAYA AREA, SOUTH SUMATRA PROVINCE Ibrahim, Muhammad Abdurachman; Harianto, Tito
Buletin Sumber Daya Geologi Vol. 16 No. 1 (2021): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v16i1.318

Abstract

South Sumatra Basin is the second largest resource of coal basin in Indonesia. The abundance of coal in this basin has opened up opportunities to exploring coal bed methane. Gas content and permeability affect the potential of coal bed methane in an area. Coal permeability is highly controlled by the cleat system that develops in the coal seam. Studies on cleat characterization in coal are mandatory to see the possible escape routes of methane gas in coal. This research was conducted to determine the relationship between the characteristics of coal, cleat system, and permeability. Coals from M3 of Muaraenim Formation were sampled for microcleat analysis. Coals from M3 is not to deep, having a good coal thickness, and one of the coal bed methane seams target, M3 members can be another coal bed methane target, besides M2 members which have proved to be coal bed methane target. Microcleat analysis was performed to observe face cleat, butt cleat, aperture and spacing. The correlation between permeability to gas content and depth of coal, illustrates that the greater permeability, the greater gas content.
KARAKTERISTIK REKAHAN BATUBARA PADA EKSPLORASI GAS METANA BATUBARA DI CEKUNGAN OMBILIN, PROVINSI SUMATERA BARAT Ibrahim, Muhammad Abdurachman; Widhiyatna, Denni
Buletin Sumber Daya Geologi Vol 12 No 1 (2017): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v12i1.19

Abstract

Eksplorasi coal bed methane (CBM) dilakukan di Kota Sawahlunto, Provinsi Sumatera Barat oleh Pusat Sumber Daya Geologi tahun 2009. Daerah ini termasuk dalam Cekungan Ombilin. Pengeboran gas metana batubara mencapai kedalaman 451 meter, menembus Formasi Sawahlunto sebagai formasi pembawa batubara yang diendapkan pada lingkungan delta. Terdapat lima lapisan batubara, yaitu lapisan batubara A, B, C, D, dan E.Salah satu karakteristik yang dapat diamati adalah rekahan batubara (cleat). Analisis microcleat digunakan untuk melihat kenampakan maseral, mineral lain, bukaan rekahan (aperture), dan spasi rekahan (spacing). Analisis microcleat juga memberikan gambaran porositas dan permeabilitas, serta kandungan gas, berdasarkan ciri fisik bukaan dan spasi rekahan batubara.Analisis microcleat memberikan gambaran bahwa semakin dalam batubara, maka akan semakin buruk permeabilitasnya, kandungan gas akan baik bila bukaan lebar, menerus, dan tidak terisi mineral, serta semakin bersih batubara dengan kilap gelas maka akan memberikan rekahan yang banyak dan memiliki komposisi gas metana yang baik.
Co-Authors Harianto, Tito Widhiyatna, Denni