Lithologic Reservoirs ›› 2018, Vol. 30 ›› Issue (3): 27-34.doi: 10.12108/yxyqc.20180304

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High efficient reservoir accumulation models of natural gas of Xujiahe Formation in northeastern Sichuan Basin

WANG Wei   

  1. Exploration Company, Sinopec, Chengdu 610041, China
  • Received:2018-02-24 Revised:2018-03-28 Online:2018-05-21 Published:2018-05-21

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Abstract: In order to figure out the differences of gas accumulation among different areas,deepen the study of the mechanisms of tight sand gas accumulation of Xujiahe Formation in northeastern Sichuan Basin, and find enrichment and high production zone of natural gas,the reservoir accumulation model and characteristics of Xujiahe Formation in northeast Sichuan Basin were studied in the aspects of source rock,gas source, structure, and sourcereservoir assemblage. The result shows that controlled by different types of source-reservoir assemblage and different tectonic deformation degree of local structure belts,there exists three types of high efficient reservoir accumulation models in Xujiahe Formation:coexisting source and reservoir model in continental weak deformation zone,near source accumulation and fault-sand pathway model in continental strong deformation zone,and doublesource supply and 3D network pathway model in continental-marine strong deformation zone. Based on these three accumulation models,the third member of Xujiahe Formation in western Yuanba area,the fourth member of Xujiahe Formation in central Yuanba area and the second member of Xujiahe Formation in Malubei area are the favorable target zones for the high efficient exploration and development in northeastern Sichuan Basin.

Key words: braided river delta, lithofacies, sedimentary model, SangongheFormation, Jurassic, Heshituoluogai Basin

CLC Number: 

  • TE122
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