eprintid: 11406 rev_number: 2 eprint_status: archive userid: 1 dir: disk0/00/01/14/06 datestamp: 2023-11-10 03:25:55 lastmod: 2023-11-10 03:25:55 status_changed: 2023-11-10 01:15:11 type: article metadata_visibility: show creators_name: Babikir, I.A.M. creators_name: Salim, A.M.A. creators_name: Ghosh, D.P. title: Lithogeomorphological facies analysis of Upper Miocene coal-prone fluviodeltaic reservoirs, Northern Malay Basin ispublished: pub keywords: coal seam; facies analysis; hydrocarbon reservoir; lithology; Miocene; reservoir characterization; sandstone; sedimentology; seismic data, Malay Basin; Pacific Ocean; South China Sea note: cited By 8 abstract: The Group E stratigraphic unit is a significant gas producer in the Northern Malay Basin. However, due to the thinly bedded nature of the sandstone reservoirs, thick shale, and abundant coal beds, accurate seismic attributes interpretation of lithology and fluid prediction has been a daunting task. To address this problem, we have conducted an integrated seismic sedimentology workflow using spectral decomposition, color blending, waveform classification, prestack seismic inversion, and stratal slicing to characterize the lithogeomorphological facies of the coal-bearing reservoirs. On spectral decomposition and waveform classification maps, we clearly identified depositional elements such as the distributary channel, distributary mouth bar, subaqueous levee, and interdistributary fill. We computed the elastic properties through prestack seismic inversion to obtain good lithology discrimination between coal and gas-charged sandstone. Both lithologies are characterized by low acoustic impedance, but the compressional to shear velocity ratio (VP/VS) of coal is high compared to gas-charged sandstone. The current interpretation indicated that the Group E interval was deposited in a delta plain setting. The varying flow directions of the distributary channels in the area support the hypothesis that describes the Malay Basin during Miocene time as a narrow gulf, connected to an open sea to the south and flanked by deltas and fan deltas. © 2019 Society of Exploration Geophysicists and American Association of Petroleum Geologists. date: 2019 publisher: Society of Exploration Geophysicists official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85107820731&doi=10.1190%2fINT-2018-0103.1&partnerID=40&md5=90f5c89ae7f3be9de8cbeb2929b7810a id_number: 10.1190/INT-2018-0103.1 full_text_status: none publication: Interpretation volume: 7 number: 3 pagerange: T565-T579 refereed: TRUE issn: 23248858 citation: Babikir, I.A.M. and Salim, A.M.A. and Ghosh, D.P. (2019) Lithogeomorphological facies analysis of Upper Miocene coal-prone fluviodeltaic reservoirs, Northern Malay Basin. Interpretation, 7 (3). T565-T579. ISSN 23248858