Oil & Gas Geology ›› 2012, Vol. 33 ›› Issue (6): 859-866.doi: 10.11743/ogg20120606

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Activity of Shinan fault and its control on hydrocarbon accumulation in the Paleogene in Bozhong Depression

Wang Guanmin1, Pang Xiaojun2, Zhang Xuefang2, Liu Zhanbo2, Liu Boao3   

  1. 1. School of Geosciences, China University of Petroleum, Qingdao, Shandong 266555, China;
    2. Institute of Exploration and Development Research, Bohai Oilfield Company, Tianjin Branch of CNOOC, Tianjin 300452, China;
    3. Western District Research Center, Shengli Oilfield Company, SINOPEC, Dongying, Shandong 257000, China
  • Received:2011-09-12 Revised:2012-09-12 Online:2012-12-28 Published:2013-01-10

Abstract:

The Paleogene in Shinan area of Bozhong depression is encountered by only a few wells,constraining the understanding of its source rock distribution,reservoir type and distribution,and hydrocarbon migration as well as reservoir types.Based on integration of 3D seismic,drilling,logging and laboratory data and in combination with sedimentary settings,we studied the features of acitivity of Shinan fault in the Paleogene in Bozhong Depression and discussed the relationship between fault activity and hydrocarbon accumulation by using fault slip rate method.The activity of the Shinan fault features in regular change pattern of"weak-strong-weak-strong-strong-weakest".It was the strongest during the deposition of the third member of Shahejie Fm and the 2nd and 3rd members of Dongying Fm when source rocks were developed.It was weak during the deposition of the 1st and 2nd members of Shahejie Fm and the 1st member of Dongying Fm when reservoirs were developed.In addition,strong depression occurred during the deposition of the 2nd member of Dongying Fm when relatively good reservoirs were developed in the large distal delta front deposits.Fault-anticline reservoirs and fault-lithologic reservoirs occur in locations with strong fault activity,while fault-lithologic reservoirs and lithologic reservoirs occur in places with weak fault activity.

Key words: reservoir distribution, oil and gas migration, faulting activity, Shinan fault, Paleogene, Bohai Bay Basin

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