储层岩石水敏性影响因素研究  

Influencing Factors of Water Sensitivity in Reservoir Rock

作　　者：汪伟英[1] 唐周怀[2] 吕迎红[2] 杜燕[2] 赵磊[2] 

机构地区：[1]江汉石油学院石油工程系,湖北荆州434102 [2]中原油田分公司,河南濮阳457001

出　　处：《江汉石油学院学报》2001年第2期49-50,共2页Journal of Jianghan Petroleum Institute

摘　　要：注入流体矿化度与储层中的粘土矿物不配伍时 ,会引起粘土矿物水化膨胀和分散 ,导致渗透率降低。研究表明 ,岩石水敏损害程度与注入水盐度、盐度递减速率以及 p H值有关。当注入水盐度低于 9　0 0 0 mg/L时 ,渗透率明显降低。盐度递减速率越快 ,水敏损害程度越大。When the salinity of injected fluid is not compatible with clay minerals in a reservoir,hydrated swell and dispersion of the clay minerals are caused,which makes permeability decreasing The result of study indicates that the extent of damage induced by water sensitivity is related with salt content, its decreasing rate and pH When the salt content is less than 9000 mg/L,permeability decreases evidently The more rapid decrease in salt content,the more serious damage of water sensitivity Water sensitivity of rock would be controlled by acidic medium,while it would be enhanced by alkaline mediumExp

关 键 词：储集层 水敏性 油层保护 粘土矿物 矿化度 渗透率 

分 类 号：TE258[石油与天然气工程—油气井工程]