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Oil Accumulation Model and Main Controlling Factors of Putaohua Oil Layer in Shangjia Region

WANG Wen-ming1,2 ,WANG Cheng-wen1   

  1. 1.College of Earth Sciences, Jilin University,Changchun 130061, China;2.Daqing Yushulin Oilfield Development Company Ltd., Daqing,Heilongjiang 163453,China
  • Received:2008-09-15 Revised:1900-01-01 Online:2009-01-26 Published:2009-01-26
  • Contact: WANG Wen-ming

Abstract: According to the comparison between source rock and oil, oil of Putaohua oil layer in Shangjia region was mainly derived from K1q1n source rock in Sanzhao sag. There is a strong ability of supplying oil of K1q1n in Sanzhao depression. Based on the spacial relationship between oil distribution of Putaohua oil layer in Shangjia region and K1q1n source rock in Sanzhao sag, the dynamic force and transporting pathway of oil migration, oil accumulation model was considered as oil from K1q1n source rock in Sanzhao sag migrated downward into Fu-Yang oil layer through T2 faults under overpressure. Oil of Fu-Yang oil layer in Sanzhao sag migrated laterally to Shangjia region through sand body connected by faults under the buoyancy. Oil of Fu-Yang oil layer in Shangjia region migrated upward into Putaohua oil layer through T2-T11 fault under the buoyancy and accumulated in fault block, fault seal and faultlithology traps to form oil reservoirs. The relationship between oil distribution of Putaohua oil layer and main accumulation conditions, oil accumulation and distribution of Putaohua oil layer in Shangjia region was mainly controlled by oil distribution of Fu-Yang oil layer, distribution of T2-T11 faults and trap development. That is, oil distribution of Fu-Yang oil layer controls oil distribution of Putaohua oil layer. Distribution of T2-T11 faults controls exact places of oil accumulation in Putaohua oil layer. Trap development provides spaces for oil of Putaohua oil layer to accumulate and distribution.

Key words: Shangjia region, Putaohua oil layer, accumulation model, main controlling factors, Fu-Yang oil layer

CLC Number: 

  • P618.13
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