Oil & Gas Geology ›› 2009, Vol. 30 ›› Issue (3): 316-323,315.doi: 10.11743/ogg20090310

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Control of faults at different evolution stages on hydrocarbon accumulation in Tazhong area,the Tarim Basin

Zhang Zhongpei, Wang Yi, Yun Jinbiao, Zhou Bo, Zhao Zhehui, Zheng Menglin   

  1. SINOPEC Exploration & production Research Institute, Beijing 100083, China
  • Received:2008-09-28 Online:2009-06-25 Published:2012-01-16

Abstract:

An analysis of how faulting activities in different evolution stages control the hydrocarbon distribution and accumulation is carried out based on a summarization of the basic features of different faulted zones in the Tazhong area,Tarim Basin.The result shows that faults in the Tazhong area were most active during the Mid-Late Caledonian,softened during the Hercynian,and weak during the late Himalaya.It also indicates that the major fault zones are significantly different in the time and stages of activity,control on the formation and deformation of sedimentary formations and stratigraphic contact relationships between the upper and lower layers.The diffe-rences in hydrocarbon accumulation among different oil/gas-bearing faulted zones are closely related with the evolutionary stages of the faults,as being embodied in the differential control of faults at four evolutionary stages on hydrocarbon accumulation,namely syn-sedimentary fault,post-sedimentary fault,peak-hydrocarbon-generation-stage fault and post-hydrocarbon-accumulation fault.

Key words: fault structure, differential evolution of fault, hydrocarbon accumulation, Tazhong area, Tarim Basin

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