EVALUATION ON STRESS SENSIBILITY OF LOW PERMEABILITY ROCK UNDER RESERVOIR CONDITION
GAO Jian1，LU Jing2，WANG Jialu2
(1. State Key Laboratory for EOR，Research Institute of Petroleum Exploration and Development，PetroChina， Beijing 100083，China；2. Department of Production Technology，Research Institute of Petroleum Exploration and Development，PetroChina，Beijing 100083，China)
Abstract：Two experimental methods are used respectively to evaluate a real reservoir¢s stress sensibility during the processes of production and water injection. It¢s shown that，compared with the conventional evaluation method，the loss rate of permeability is considerably lower during production process，and the rock¢s permeability loss caused mainly by elastic deformation is recoverable when the new method is used. However，the rock¢s deformation caused by both elastic and plastic deformations is irreversible in conventional experimental method. So serious stress sensibility does not exist in low permeability reservoir，which is significant for low permeability reservoir development.
