Lithologic Reservoirs ›› 2009, Vol. 21 ›› Issue (3): 70-75.doi: 10.3969/j.issn.1673-8926.2009.03.014

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Sedimentary facies of Upper Triassic Xujiahe Formation in Maliuchang-Datachang area, southern Sichuan Basin

LIU Juan1,TIAN Jingchun 1,2， ZHANG Xiang1,WANG Wenzhi1   

  1. 1 . Institute of Sedimentary Geology， Chengdu University of Technology， Chengdu 610059， China； 2. State Key Laboratory of Oil and Gas Reservoir Geology and Ex ploitation， Chengdu University of Technology， Chengdu 610059， China
  • Online:2009-09-16 Published:2009-09-16

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Abstract:

Based on detailed field outcrop profiles and the core drilling observation, combining with the rock color, sedimentary structures, profile structures and log facies, the sedimentary facies of Xujiahe Formation in Maliuchang-Datachang area of southern Sichuan Basin is analyzed. There are two kinds of sedimentary facies which are braided delta and lacustrine facies. Furthermore, the braided delta is divided into braided delta plain and braided delta front sub-facies, and the lacustrine facies is divided into coastal lake and shallow lake sub-facies. The characteristics of sedimentarymicrofacies are studied. The study results are useful to detailedly understand the depositional environment during the period ofXujiahe Formation, and provide basic geologic data for oil and gas exploration in southern Sichuan Basin.

Key words: transverse isotropy, isotropic homogeneity, seismic wave field, reverse time migration

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