The Characteristics,Formation and Petroleum Geology Significance of the Strike-slip Fault System in Shunnan Area,Northern Slope of Tazhong Uplift

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  • 1.State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum,Beijing 102249,China;
    2.Basin & Reservoir Research Center,China University of Petroleum,Beijing 102249,China;
    3.Northwest Oilfield Company,SINOPEC,Urumqi 830000,China;
    4.Institute of Mineral Resource Research,China Metallurgical Geology Bureau,Beijing 101300,China

Received date: 2015-03-02

  Revised date: 2015-05-13

  Online published: 2015-12-10

Abstract

The Ordovician reservoir of the Shunnan area showed a good oil and gas exploration potential.Based on the 3D seismic interpretation and attribute extraction technique,the structural characteristics,formation mechanism and petroleum geology significance were discussed in the profile as well as the section,providing a new idea for the geological structure modeling and oil and gas exploration.Studies show that there are three different trending strike-slip faults.The NE- and NEE-striking faults show sinistral strike-slip,while the smaller-scale,NW-striking faults were characterized by dextral strike slip.The NE-striking fault formed a typical flower structure,while the NEE and NW are relatively simple,manifested as single and vertical fault.In the III screen of middle Caledonian,Tazhong No.1 Structural Zone thrust fault was formed by a nearly N-S-striking compression.In its tectonic deformation divisions,there occurred strike-slip component perpendicular to Tazhong No.1 Structural Zone,and developed NE- and NEE-trending strike-slip faults in Shunnan area.The blocks restricted by the two sets of sinistral strike-slip faults have a counterclockwise trend,resulting in NW-striking dextral shear deformation in the internal blocks.The controlling of strike-slip faults on hydrothermal karst mainly manifested in linear karstification along the NE- and NEE-trending strike-slip fault,and planar karstification involved in the NW strike-slip faults.The strike-slip fault is also taken as the path of vertical oil and gas migration.

Cite this article

ZHEN Su-jing,TANG Liang-jie,LI Zong-jie,LI Meng,CAO Zi-cheng,YANG Su-ju . The Characteristics,Formation and Petroleum Geology Significance of the Strike-slip Fault System in Shunnan Area,Northern Slope of Tazhong Uplift[J]. Natural Gas Geoscience, 2015 , 26(12) : 2315 -2324 . DOI: 10.11764/j.issn.1672-1926.2015.12.2315

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