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All Journal IJOG : Indonesian Journal on Geoscience Buletin Sumber Daya Geologi
Muhammad Abdurachman Ibrahim
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Earth & Planetary Sciences Education Energy Engineering Environmental Science

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KARAKTERISTIK REKAHAN BATUBARA PADA EKSPLORASI GAS METANA BATUBARA DI CEKUNGAN OMBILIN, PROVINSI SUMATERA BARAT Muhammad Abdurachman Ibrahim; Denni Widhiyatna
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 | Full PDF (9499.537 KB) | 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.
Characteristic Analysis of Indonesian Low and Medium Rank Coals and Their Influence on Carbon Dioxide Adsorption Capacity Ramdhani, Muhammad Rizki; Yan Rizal R; Sigit Arso Wibisono; Soleh Basuki Rahmat; Muhammad Abdurachman Ibrahim; Eko Budi Cahyono
Indonesian Journal on Geoscience Vol. 11 No. 3 (2024)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.11.3.391-407

Abstract

Indonesia has great deep-seated coal potential , such as Lakat coal and Muaraenim coal, which can be utilized as a medium for Carbon Capture and Storage (CCS). These coals vary in characteristic which affects their ability to adsorb or store carbon dioxide gas (CO2). The moisture content of the Lakat coal is less than that of the Muaraenim coal, while the ash content of Lakat coal is 4-5 times higher than the Muaraenim coal. Lakat coal contains more vitrinite content than Muaraenim coal, while Muaraenim coal contains more inertinite content than Lakat coal. The CO2 gas adsorption capacity of Muaraenim coal is 37.62 cc/g which higher than Lakat coal (31.56 cc/g) on dry ash-free basis. The adsorbed CO2 is negatively correlated with vitrinite reflectance, ash content, and moisture content in both coals. The correlation between maceral composition (vitrinite and inertinite content) and adsorbed CO2 content differs between these coals. These analyses will support the CCS/CCUS study in deep seated coal seams by providing the information of CO2 maximum holding capacity in coal and their relationship to its chemical and organic composition.
Co-Authors Denni Widhiyatna Eko Budi Cahyono Ramdhani, Muhammad Rizki Sigit Arso Wibisono Soleh Basuki Rahmat Yan Rizal R