An Analysis on Mechanical Genesis of Overpressure at Kala 2 Gas Pool in Kuqa Down-Warping Region
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摘要: 在已有的众多超压机制中, 构造应力作用是人们普遍认为有效的少数几种增压机制之一.为此, 进行了克拉2气藏剖面三维构造应力场数值模拟.研究结果表明在克拉2储集层构造部位有10MPa左右的应力集中, 克拉2气藏异常高地层压力中约5 0MPa由构造应力作用引起, 剩余部分由其他增压机制引起.该研究对于准确评价气藏的储量、指导气藏开发等有一定的意义.Abstract: Tectonic stress action is one of the few effective over-pressuring mechanisms in many existing over-pressuring mechanisms. Therefore, a vertical three-dimensional tectonic stress section passing Kala 2 gas pool is simulated. The results show that there is about 10 MPa stress concentration at Kala 2 reservoir structural part, and that there is about 50 MPa that is caused by tectonic stress action in the overpressure of Kala 2 gas pool, and the rest by other over-pressuring mechanisms. This research has significance for reasonably assessing and developing gas pool.
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Key words:
- Kuqa down-warping region /
- Kala 2 gas pool /
- overpressure
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表 1 物理力学参数
Table 1. Physical and mechanical parameters
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