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Bulletin of Geological Science and Technology. 2021, (05) Core

Reservoir control of tight sandstone provenance system in Xujiahe Formation,Sichuan BasinChinese Full TextEnglish Full Text (MT)

Yao Wenli;College of Technology and Engineering, Yangtze University;

Abstract: In order to clarify the provenance characteristics and reservoir control of tight sandstone in Xujiahe Formation of Sichuan Basin, by means of reservoir petrology test and microscopic analysis, the relationship and distribution between provenance and reservoir development are studied, and the controlling factors of provenance system are discussed.The results show that the Xujiahe Formation reservoir in Sichuan Basin has five basic characteristics: low composition maturity, strong physical property difference, mainly medium fine grain, mainly dissolution pores and two sides of diagenetic effect; the provenance controls the development range of reservoir rock types, the plane distribution is different, and the composition and content of soluble minerals are also different, which leads to different porosity Longmenshan in the West and Dabashan in the Northeast are the main source areas of Xujiahe Formation.The former shows relatively high content of carbonate cuttings, while the latter shows relatively high content of volcanic cuttings.The stage change of orogenic activity intensity in different periods leads to the change of provenance supply intensity and types, the differentiation of reservoir rock components, and then controls the vertical heterogeneity of reservoir.The research results can provide reference for the next fine oil and gas exploration in this area.
Keywords：

Sichuan Basin; Xujiahe Formation; provenance system; tight sandstone; reservoir control;

  • DOI：

    10.19509/j.cnki.dzkq.2021.0036

  • Series：

    (A) Mathematics/ Physics/ Mechanics/ Astronomy; (B) Chemistry/ Metallurgy/ Environment/ Mine Industry

  • Subject：

    Petroleum, Natural Gas Industry; Geology

  • Classification Code：

    P618.13

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