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Controlling of the Match of Source Rock|Overpressure and Fault on Oil Accumulation of |Fu-Yang Oil Layer in |Sanzhao Depression

WANG Ya-chun1,2, WANG Sheng-nan1   

  1. 1.College of Earth Sciences, Daqing Petroleum Institute, Daqing,Heilongjiang 163318,China;2.Faculty of Geo-Resource and Information, China University of Petroleum, Beijing 102249,China
  • Received:2009-03-25 Online:2009-07-26 Published:2009-07-26

Abstract:

Based on the study of K1qn1 source rock development and hydrocarbon-expulsion characteristics, overpressure and its distributing characteristicss, T2 source fault and its distributing characteristics of Fu-Yang oil layer in Sanzhao depression, the match of source rock, overpressure and fault and its controlling effects on hydrocarbon accumulation and distribution have been studied. It is concluded that the match of K1qn1 source rock and its internal overpressure controls the range of oil accumulation and distribution, the vertical match of overpressure and T2 source fault controls the depth and layer of oil accumulation，the plane match of overpressure and T2 source fault controls the site of oil accumulation in Fuyang oil layer. It is considered that ①oil mainly accumulates in the area where T2 source fault abundant in the zone of oil migration downward; ②the more closer and the more shorter distance from faults, the more abundant oil is  in the zone of oil migration downward; ③oil mainly accumulates in the lower wall of T2 source fault in the zone of oil migration downward.

Key words: Sanzhao depression, Fu-Yang oil layers, K1qn1 source rock, overpressure, T2 source fault, match, controlling effects on oil accumulation

CLC Number: 

  • P618.13
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