Lithologic Reservoirs ›› 2021, Vol. 33 ›› Issue (1): 81-89.doi: 10.12108/yxyqc.20210108

• PETROLEUM GEOLOGY • Previous Articles     Next Articles

Identification of faults in the south slope of Mahu Sag and its control on hydrocarbon accumulation

YU Xing, YOU Xincai, BAI Yu, LI Peng, ZHU Tao   

  1. Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, Xinjiang, China
  • Received:2020-06-23 Revised:2020-09-07 Online:2021-02-01 Published:2021-01-25

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Abstract: Recently,extra-high industrial oil flow was obtained in Jurassic Badaowan Formation in well MH015 in the south slope of Mahu Sag of Junggar Basin,which has opened up a new prospect of medium and shallow oil and gas pre-exploration in this area. In order to further explore the characteristics of faults,the control of faults on reservoirs,oil and gas enrichment rules and exploration potential in the south slope of Mahu Sag,field geological outcrop,logging data and seismic fault identification technology were applied to comprehensively analyze the fault formation period,fault spatial combination and hydrocarbon accumulation model in the study area. The results show that:the reverse faults in the Late Hercynian-Indosinian and strike-slip faults in Indosinian-Yanshanian are the key factors of oil and gas migration in south slope of Mahu Sag. The hydrocarbon accumulation in this area has the characteristics of hydrocarbon supply from near source rocks,vertical three-dimensional transport of multistage faults,fault lithology controlling accumulation and three-dimensional oil-bearing. The research results point out the direction for the subsequent oil and gas exploration deployment in this area.

Key words: fault identification, hydrocarbon transport, accumulation potential, south slope of Mahu Sag, Junggar Basin

CLC Number: 

  • TE122.1
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