Oil & Gas Geology ›› 2005, Vol. 26 ›› Issue (2): 257-262.doi: 10.11743/ogg20050221

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Relationship between transfer structures and hydrocarbons in Baiyinchagan depression

Ku Guozheng1, Zhang Fangdong1, Deng Yixun1, Li Xi'ai1, Wang Jingyun1, Liu Jinzhong2   

  1. 1. Exploration and Development Research Institute, Zhongyuan Oilfield Company, Puyang, Henan;
    2. Geologic Logging Department of Zhongyuan Oilfield Company, Puyang, Henan
  • Received:2005-03-20 Online:2005-04-25 Published:2012-01-16

Abstract:

During the evolution of Baiyinchagan depression, various types of transfer structural accommodation systems have been formed in different parts of the extensional structure, due to the elevation and subsidence of the basement and uneven faulting. Maohu swell in Baiyinchagan depression is a large transfer structural zone, which consists of two synthetic oblique accommodation zones and one strike-paralleled accommodation zone. The structural accommodation zones in the western sag can be divided into 4 types, including antithetic anticline accommodation zone, synthetic transverse accommodation zone, synthetic oblique accommodation zone and strike-paralleled accommodation zone. Exploration practices show that there are well developed structural, lithological and overlapping unconformity traps in the Xilinhaole, Darqinan, Darqidong and Wongte accommodation zones and their adjacent areas in southern part of the western sag, and they have long been in the major direction of hydrocarbon migration. Therefore, they are favorable for the accumulation and enrichment of hydrocarbons.

Key words: Baiyinchagan depression, extensional basin, transfer structure, accommodation zone, petroleum

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