|Table of Contents|

Various effects of faults on generation, migration and accumulation of oil/gas in Gaoyou Sag(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2012年第01期
Page:
20-28
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Various effects of faults on generation, migration and accumulation of oil/gas in Gaoyou Sag
Author(s):
GAO Xian-zhi1 LI Hao1 LIU Qi-dong2
1. School of Geosciences, China University of Petroleum, Beijing 102249, China; 2. Geological Research Institute, Jiangsu Oilfield Company, Sinopec, Yangzhou 225012, Jiangsu, China
Keywords:
fault trap hydrocarbon source rock oil/gas migration accumulation sealing ability Gaoyou Sag
PACS:
TE122.1; P618.13
DOI:
-
Abstract:
Based on the analysis of fault activity periods, fault distribution characteristics and hydrocarbon occurrence, the various effects and mechanisms of faults on generation, migration, accumulation and distribution of hydrocarbons were discussed. According to the roles played in the whole process of hydrocarbons from source rocks to traps, the faults could be divided into five types. ①Faults that controlled the distribution of hydrocarbon source rocks and the period of hydrocarbon generation: the effective hydrocarbon source rocks were located in the downdip block of faults with earlier hydrocarbon generation in the western region than that in the eastern region of Gaoyou Sag; ②faults that connected with the hydrocarbon source rocks and controlled the oil/gas migration trends: the steep and convex sections of faults were the main pathways of oil/gas migration in the fault zone of Gaoyou Sag; ③faults that redirected the petroleum migration pathways and controlled the location of hydrocarbon occurrence: the faults caused that there were two opponent roles of distraction and concentration for oil/gas distribution in Gaoyou Sag; ④faults that controlled the types and distributions of various traps; ⑤faults that adjusted and destroyed the oil pools and controlled the enrichment and physical properties of petroleum in the traps: the faults were active during Yancheng Period and Sanduo Period in Gaoyou Sag. It was concluded that the multistage and diversity of faults in Gaoyou Sag resulted in the difference and variety of the sealing ability of faults in time and space, and played the complex and multiple roles on oil/gas migration and accumulation.

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Last Update: 2012-03-20