Characteristics of Pressure Field and Its Relationship with Hydrocarbon Distribution in Liaoxi Low Uplift and Liaozhong Sag
详细信息
- 责任者：Zhou Donghong (Tianjin Branch of CNOOC ; Tianjin 300452 ; China) ; Li Jianping
- 刊名：Fault-Block Oil and Gas Fields
- 出版年：2012
- 卷期：19(1)
- 关键词：油气藏形成 ; reservoir formation ; 地层压力 ; formation pressure ; 辽宁 ; Liaoning Province
- 页码：p.65-69
- 图表：4 illus., 1 table, 15 refs.
- 分类号：1003
- issnNo：ISSN1005-8907
- isbnNo：CN41-1219/TE
摘要
The phenomenon of overpressure extensively exists in Liaoxi Low Uplift and Liaozhong Sag.The abnormal overpressure mainly distributes from lower Ed2 to Es1 and Es3 members.The hydrocarbons generated from the main hydrocarbon source rocks in Liaozhong Sag which is driven by the strong power of overpressure are delivered to the favorable traps in Liaoxi Low Uplift and the slope belt of Liaozhong Sag,then,gather together as reservoirs along the transferring systems(fault,sand body and unconformity,etc).Gas is mainly accumulated in abnormal overpressure belt and oil is mainly accumulated in abnormal overpressure belt or the edge of it(normal pressure belt or transitional pressure belt).A few lithologic reservoirs and condensate gas reservoirs with the superior sealing conditions are located in overpressure zone.If there is double sealing of overlying mudstone and pressure in the reservoir,the accumulation quantity of oil and gas is obviously increased.