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Sedimentology, Stratigraphy and Reservoir Quality in Outcrop Fluvial Sandstone, Khorat Group, Thailand |
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| รหัสดีโอไอ | |
| Creator | Quang Hong Le |
| Title | Sedimentology, Stratigraphy and Reservoir Quality in Outcrop Fluvial Sandstone, Khorat Group, Thailand |
| Contributor | - |
| Publisher | Department of Geology, Chulalongkorn University |
| Publication Year | 2556 |
| Journal Title | Bulletin of Earth Sciences of Thailand (BEST) |
| Journal Vol. | 6 |
| Journal No. | 2 |
| Page no. | 109-114 |
| Keyword | Sedimentology, Reservoir quality, Khorat Group |
| URL Website | https://www.bestjournal.org/ |
| Website title | Bulletin of Earth Sciences of Thailand |
| ISSN | 1906-280X |
| Abstract | A more than 1000 m wide and 10-15 m thick outcrop succession was investigated for lithology, sedimentary structures, bed geometry, grain size and reservoir quality. There are 10 lithofacies that comprise single and multi-story sheet sands, lenticular point bar sands, crevasse splays and oxbow lakes. Wedge-shaped, massive sands were interpreted as levee and abandoned channel environments. All are part of a meandering river depositional system. Three reservoir rock types, of poor to moderate quality, were interpreted from XRD and thin sections of four samples in combination with gamma ray logs across the outcrop. The best one is trough cross-bedded sub-arkose sandstones. The sandstones are in late middle diagenesis and compaction has significantly reduced porosity. Authigenic clays, sediment structures and bioturbation also decreased reservoir quality. Generally, the reservoirs are suitable for gas accumulation. |
