储层岩石的2种应力敏感机制--应力敏感有利于驱油

Two types of stress sensitivity mechanisms for reservoir rocks:Being favorable for oil recovery

储层岩石存在本体变形和结构变形2种变形方式。储层岩石的应力敏感也存在本体变形应力敏感和结构变形应力敏感2种应力敏感机制。根据该文的研究,岩石的本体变形导致的应力敏感程度极弱,生产过程中可以将其忽略;而岩石的结构变形导致的应力敏感程度则极强,它不仅不会降低油藏的产能,反而会维持油藏的地层能量和提高油藏的产能,十分有利于驱油。

There exist two typical deformations for reservoir rocks： primary deformation and structural one. Accordingly, there are two types of stress sensitivity for reservoir rocks. Based on the research, the stress sensitivity of reservoir rocks caused by primary deformation is quite weak, and it can be neglected in the production practice of reservoir development. However, the stress sensitivity of reservoir rocks caused by structural deformation is quite strong, which can not only reduce the production rate of reservoir, but also maintain the reservoir pressure properly and increase the production rate of oil. The stress sensitivity of reservoir rocks is quite favorable for oil recovery.