Lithologic Reservoirs ›› 2018, Vol. 30 ›› Issue (2): 23-29.doi: 10.12108/yxyqc.20180203

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Controlling factors of hydrocarbon enrichment with the type of “below source and upper reservoir” in fault concentrated zones and nearby

FU Guang, WANG Yupeng   

  1. School of Earth Sciences, Northeast Petroleum University, Daqing 163318, Heilongjiang, China
  • Received:2017-06-18 Revised:2017-08-17 Online:2018-03-21 Published:2018-03-21

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Abstract: In order to study the oil and gas distribution law of the type of "below source and upper reservoir" in fault concentrated zones and nearby, based on the analysis of internal structure types and its genesis of the fault concentrated zones, through the study of the relationship between the reservoir forming conditions and hydrocarbon distribution in the fault concentrated zones and nearby, the controlling factors of hydrocarbon enrichment with the type of "below source and upper reservoir" in fault concentrated zones and nearby were studied. The results show that there are mainly three controlling factors of hydrocarbon enrichment:(1)Whether the boundary fault in the fault concentrated zones is the source fracture that controls the hydrocarbon accumulation, only the boundary fault in the fault concentrated zones is the source fracture can make the underlying source rocks generate and accumulate oil and gas in the fault concentrated zones and nearby target layer. (2)Hydrocarbon enrichment degree is controlled by the type of fault concentrated zones, and hydrocarbons are enriched in the back fault concentrated zones and nearby, but relatively few in the monoclinic and synform fault concentrated zones and nearby. (3)The relationship between the boundary fault and caprock controls the hydrocarbon accumulation layer, in the caprock enclosed area, hydrocarbons accumulate under the caprock, otherwise, accumulate up and down the caprock. Therefore, the above three main factors should be taken into consideration in the oil and gas exploration of the type of "below source and upper reservoir" in fault concentrated zones and nearby.

CLC Number: 

  • TE122
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