Journal of Jilin University(Earth Science Edition) ›› 2021, Vol. 51 ›› Issue (2): 355-366.doi: 10.13278/j.cnki.jjuese.20200037

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Recognition Method and Application of Fault Trap Position and Formation Period in Slope Area: A Case Study in Wen'an Slope, Jizhong Depression

Liu Junqiao1,2,3, Lü Yanfang1, Fu Guang1, Hu Xinlei1, Shi Jijian1, Sun Tongwen2,3   

  1. 1. College of Earth Science, Northeast Petroleum University, Daqing 163318, Heilongjiang, China;
    2. College of Petroleum Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, Guangdong, China;
    3. Guangdong Research Center for Unconventional Energy Engineering Technology, Guangdong University of Petrochemical Technology, Maoming 525000, Guangdong, China
  • Received:2020-02-21 Published:2021-04-06
  • Supported by:
    Supported by the National Natural Science Fund(41872153,41702153), Talent Introduction Fund of Guangdong University of Petrochemical Technology in 2018(2018rc06),Guangdong Research Center for Unconventional Energy Engineering Technology Open Fund(GF2018A007) and Young Innovative Talents Project of Guangdong Universities(2018KQNCX159)

Abstract: Fault trap is an important type of structures in a slope area. To identify the location and formation period of fault traps, the authors analyzed the formation and evolution process of the consequent and antithetic fault traps in the slope area on the basis of considering the formation and evolution of faults. The result suggested that the consequent fault traps were formed in the "hard-linkage" stage and developed at the segmented growth sites of the hanging wall of the fault; while the antithetic fault traps were formed at the beginning of the fault activity and developed at the site with the largest displacement of the footwall of the fault. On this basis, a method was established to identify the fault trap location and formation period combined fully with the technology of throw-distance curve, coherent slice, the quantitative representation of the fault segment growth stage, and the throw back-stripping using detailed 3D seismic data. This method was applied to identify the fault trap location and formation period in the Wen'an slope of Jizhong depression, and the result is in accord with the actual hydrocarbon distribution.

Key words: consequent fault trap, antithetic fault trap, transverse anticline, forming period, recognition method, Jizhong depression

CLC Number: 

  • P618.13
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