CAJ | 학술논문

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 pH值有关。当注入水盐度低于9000mg/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。酸性介质能抑制岩石水敏性而碱性介质会增强岩石水敏性。
주입류체광화도여저층중적점토광물불배오시，회인기점토광물수화팽창화분산，도치삼투솔강저。연구표명，암석수민손해정도여주입수염도、염도체감속솔이급 pH치유관。당주입수염도저우9000mg/L시，삼투솔명현강저。염도체감속솔월쾌，수민손해정도월대。산성개질능억제암석수민성이감성개질회증강암석수민성。
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 medium.