DEPOSITIONAL ENVIRONMENT OF THE LAN KRABU FORMATION IN SIRIKIT OIL FIELD, PHITSANULOK BASIN, THAILAND
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Abstract
The study was conducted to better understand the depositional environment of the Lan Krabu Formation in the Sirikit Oil Field of Phitsanulok Basin in order to improve the reservoir prediction, development of Sirikit Oil Field and new play exploration. Ten Lan Krabu Formation conventional cores from seven wells and log data from forty-five wells were integrated to interpret the depositional environment and establish the paleogeographic model of the Upper and Lower Lan Krabu Formation. The depositional environments were identified as freshwater lake, lacustrine/delta, alluvial plain with fluvial channels, and alluvial fan. There is not much difference in environment between the Lower and Upper Lan Krabu Formation, except the geographic boundary of each facies. The key evidence indicating non-marine environments and freshwater lakes area is Viviparidae gastropods and freshwater bivalves. The clastic sediment supply was mainly from the east and northeast to the west where the freshwater lake developed in the basin center.
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Copyright © 2008 Department of Geology, Faculty of Science, Chulalongkorn University. Parts of an article can be photocopied or reproduced without prior written permission from the author(s), but due acknowledgments should be stated or cited accordingly.
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