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SEQUENCE STRATIGRAPHIC INTERPRETATION OF CHANNEL SAND DISTRIBUTION USING WELL LOGS FROM THE BUALUANG FIELD, GULF OF THAILAND |
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| รหัสดีโอไอ | |
| Creator | Chatlada Malasri |
| Title | SEQUENCE STRATIGRAPHIC INTERPRETATION OF CHANNEL SAND DISTRIBUTION USING WELL LOGS FROM THE BUALUANG FIELD, GULF OF THAILAND |
| Contributor | - |
| Publisher | Department of Geology, Chulalongkorn University |
| Publication Year | 2557 |
| Journal Title | Bulletin of Earth Sciences of Thailand (BEST) |
| Journal Vol. | 7 |
| Journal No. | 2-Jan |
| Page no. | 16-25 |
| Keyword | Bualaung Field, Western Basin, Fluvial Channel Sands, Stream gradient, Sea Level Rise, Faulting |
| URL Website | https://www.bestjournal.org/ |
| Website title | Bulletin of Earth Sciences of Thailand |
| ISSN | 1906-280X |
| Abstract | The most important reservoir sandstones in the Bualaung Field, Gulf of Thailand, are fluvial channel sands with a complex stratigraphy that has resulted in uncertainties in reservoir prediction and reserve estimation. The distribution, geometry and stacking pattern of the sands within the late syn-rift to post-rift succession was determined from sequence stratigraphic interpretation of wireline log data from twelve wells. The study interval includes two stratigraphic units: aggradationally-stacked thin channel sands with thin interbedded floodplain mudstones that underlie isolated thick channel sands interbedded with thick floodplain mudstone. The stacking pattern reflects a decrease in stream gradient with time that was caused by a relative sea level rise and/or waning of fault activity during the transition from syn-rift to post-rift. The variable sand geometry and connectivity has significant implications for field development and reserve estimation, with the well-connected, thicker sands having better reservoir potential than the stacked thinner sands. The results of this study are applicable to other areas in the Gulf of Thailand, or wherever there is a gradual syn-rift to post-rift transition. |
