Evolution Characteristics of Hydrocarbon Migration and Translocation System in Katake Uplift
详细信息
- 责任者：Li Kun (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Shen Zhongmin
- 刊名：Fault-Block Oil and Gas Fields
- 出版年：2011
- 卷期：18(3)
- 关键词：油气运移 ; oil and gas migration ; 断裂 ; fractures
- 页码：p.317-320
- 图表：illus., 12 refs.
- 分类号：1003
- issnNo：ISSN1005-8907
- isbnNo：CN41-1219/TE
摘要
Katake Uplift is controlled by the multiperiod structural superposition during the long geohistory,having the reservoir formation characteristics of three-period hydrocarbon generation,two-period adjustment,early-period oil generation,late-period gas injection and multiple oil-gas accumulation,which restricts the oil and gas exploration.Based on the analysis of hydrocarbon migration and translocation system,and taking the oil source faults and regional unconformity evolution as a breakthrough,the hydrocarbon migration and translocation system can be divided into four types: fracture type,unconformity type,translocation bed type and combination type.By reconstructing the paleo-tectonic evolution based on the seismic data,the analysis of evolution and coordinate of translocation system,and through recognizing the dynamic processes of oil-gas migration,this paper pointed out that the regional oil source faults of TazhongⅠ,Tazhong Ⅱ and Tazhong Ⅴ are the main paths for vertical migration of oil and gas.Furthermore,the study shows that the superposition of T74,T70,T60 unconformities is a key factor for horizontal migration of oil and gas.The geometrical shapes of the translocation system,especially the distribution of inherited trap during the key epochs of oil-gas gathering in geohistory,decides the predominant migrational direction and path of oil and gas.In Katake Uplift,the most distinct characteristics of oil-gas translocation is a compoud system consisted of fault,conformity surface and karst network.The hydrocarbon migrates along the structural ridge in a three-dimensional,reticular and multistep shape.
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