西南石油大学学报(自然科学版)

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Significance of Fault and Fracture Developing Area in Oil and Gas
Exploration in Tazhong

Han Jie*, Jiang Jie, Zhang Min, Wu Meizhen, Pan Wenqing   

  1. Research Instutute of Petroleum Exploration and Development,Tarim Oilfield Campany,PetroChina,Korla,Xinjiang 841000,China
  • Online:2015-04-01 Published:2015-04-01

Abstract:

In view of the problems of the strong heterogeneity in the formation of Z15 well field in western Tazhong,the
buried depth of the main formation of interest over 5 000 meters,the bad quality of seismic data,and minor faults to be
difficult to identify,and so on,we present the discrimination method for the minor fault interpretation to be easy to implement.
Namely,amplitude on top of the Cambrian salt bed,twist on top of limestone bed,paternoster in the seismic section,and facies
change of seismic lineup in carbonate inside. By these methods,the faults are described accurately in plane and section. The
west-east direction overriding fault developed in middle and late Caledonian and transtension strike-slip fault developed in late
Caledonian and early Hercynian is the main faults system in Z15 well field and controlling the distribution of formation and
reservoir. Several wells drilled through fault in this well field prove that the fault and fracture developing area are favorable for
high production well. Fault and fracture developing area are good to be drilled because of its well-developed formation,well
conserved hydrocarbon and weak aquifer energy in Lianglitage group. This will break new ground for researches formation and
reservoir related to fault. And it will also help to discover new oil and gas concentration area.

Key words: Tarim Basin, Ordovician, carbonate rock, fault, formation transformation