Depositional Environment and Facies in Units 2A, 2B and 2C of The Graben Trend in Arthit Field, North Malay Basin, Gulf of Thailand
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Abstract
This study focused on cores from the Arthit Area. The depositional environment was interpreted to be a tide-dominated shoreline and the facies represent a stacked mouth bar and a variety of tidal sediments. The thin individual mouth bar sands indicate a small fluvial system not more than a few hundred meters across. The small delta system may have generated stacked mouth bar sands that are well-connected over an area of a few km2 by lobe switching, but they would not have extended the multi-km distance between wells. The tidal sands, although laterally extensive, have poor reservoir properties. Well log patterns correspond to lithology in the cored intervals but the log signatures are not always reliable indicators of depositional environment. They often are recording minor local events and not the regionally significant flooding surface that are parasequence boundaries. This is problematic for well to well correlation over distances of several km and can easily lead to miscorrelation.
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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.
References
Lambiase, J.J., Damit, A.R., Simmons, M.D., Abdoerrias, R. and Hussin, A., 2003. A depositional model and the stratigraphic development of modern and ancient tide-dominated deltas in NW Borneo.In Posamentier, H.W., HasanSidi, F., Darman, H. and Nummedal, D. (eds.), Deltas of the Asia Pacific Region: Modern and Ancient. Society of Sedimentary Geology Special Publication No. 76, p. 109 – 124.
Nichols, G., 1999, Sedimentology and Stratigraphy (2nd edition), John Wiley &Son Ltd., The ATRIUM, Southern Gate, Chichester, West Sussex, UK., 419p.
Rider, M.H., 1996, The geological interpretation of well log (2nd edition), Whittles Publishing, Caithness UK,.280 p.
Walker, R.G., 1984. Facies Model, Second edition, department of geology McMaster University, Hamiton, Ontario, Canada, Chapter 8.