低渗储层应力敏感分析  

Analysis of Sensitive-to-Stress of Low-Permeability Reservoirs

作　　者：刘铁成[1] 唐海[1] 吕栋梁[1] 赵永杰 

机构地区：[1]西南石油大学 [2]中国石油集团海洋工程有限公司

出　　处：《低渗透油气田》2010年第1期97-99,共3页

摘　　要：为了评价低渗储层的应力敏感，开展了相关实验研究，包括老化处理、定困压下降内压实验、不同围压下降内压实验，采用稳态法测定岩心受不同应力状态下的渗透率值。实验表明：在相同围压下，降低内压造成的渗透率损失率相同；在不同围压下，渗透率损失率随围压升高呈指数关系降低。在储层应力敏感性分析中，由两个应力共同影响渗透率变化规律。In order to evaluate the stress-sensitiveness of low permeability reservoir layers, relevant experiments and research are carried out, including aging treatment, fixed confining pressure falling inner pressure test and internal pressure experiments under different confining pressures, steady-state method is adopted to measure the permeability values of rock cores under different stress states. Experiments show that： in the same confining pressure, the permeability loss rate caused by the reduction of the internal pressure is the same： under different confining pressures, the permeability loss rate is lowered in exponential relationship with the increase of confining pressure. In the reservoir stress sensitivity analysis, permeability change rate is commonly affected by two stresses.

关 键 词：低渗 应力敏感 渗透率损失率 内压 围压 

分 类 号：TE122.23[石油与天然气工程—油气勘探]