Hydrocarbon Accumulation Characteristics and the Formation Mechanism of Palaeozoic Reservoir in Tazhong Area
详细信息
- 责任者：Tan Lü (Tianjin Branch ; China National Offshore Oil Corporation ; Tianjin 300452 ; China) ; Wang Liqun
- 刊名：Natural Gas Geoscience
- 出版年：2013
- 卷期：24(2)
- 关键词：油气聚集 ; oil and gas accumulation ; 油气藏形成 ; reservoir formation
- 页码：p.300-309
- 图表：illus., 1 table, 41 refs.
- 分类号：1003
- issnNo：ISSN1672-1926
- isbnNo：CN62-1177/TE
摘要
Palaeozoic central Tarim basin which is complex in geology and rich in hydrocarbon is a typical composite reservoir area.Based on the production and research data obtained by now,by multidisciplinary analyses on the hydrocarbon source rocks,reservoir types,cap rock,and migration pathway of Tazhong area,the following conclusions have reached.Multiple phase hydrocarbon charging occurred in Tazhong area with multiple source rocks,and the reservoir types are complicated with multiple reservoir-cap groups.The traps include anticline,fault depression,reef flat,lithologic trap,magmatic trap and so on.Migration pathway includes fault,unconformity,fracture-hole,sandstone formation and so on,among which fault is mainly a vertical pathway,and the unconformity,fracture-hole and sandstone formation are mainly lateral pathways.Studies suggest that multiple tectonic movements and sedimentary evolution are a fundamental cause for the composite reservoir formation;multiple source rocks and multiple hydrocarbon chargings are the base of complex reservoir;inhomogeneous geology condition,especially faults and reservoir,is the direct cause for multiple types of reservoirs and its complex distribution.This research result is significant for the composite reservoir theory’s advancement and for the hydrocarbon exploration in Tazhong area.
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