煤岩水敏性机理研究及防治  

Research and Prevention of Coal Water-Sensitive Mechanism

作　　者：崔金榜[1,2] 汪伟英[3] 张承洲[3] 喻鹏[2,4] 胡振华[3] 刘建伟[2,4] 

机构地区：[1]华北油田分公司煤层气勘探开发事业部,山西长治046000 [2]中国石油天然气集团公司煤层气开采先导试验基地,河北任丘062552 [3]油气资源与勘探技术教育部重点实验室(长江大学),湖北武汉430100 [4]华北油田分公司勘探开发研究院,河北任丘062552

出　　处：《石油化工高等学校学报》2015年第2期54-57,共4页Journal of Petrochemical Universities

基　　金：大型油气田及煤层气开发国家科技重大专项课题"山西沁水盆地煤层气水平井开发示范工程"资助项目(2011ZX05061)

摘　　要：通过静态观察实验以及岩心动态流动实验,研究了煤岩吸水膨胀对储层的影响,揭示了煤岩水敏机理,提出了防治煤岩水敏的方法。水敏实验结果表明,煤岩很容易发生水敏,对地层产生较大伤害。膨胀实验显示,煤粉在低矿化度的流体中更易发生膨胀。对煤粉充填压实岩心进行的流动实验结果表明,黏土矿物水化膨胀,产生微粒运移,使渗透率下降,对储层的伤害具有不可逆性,而KCl对抑制煤岩膨胀具有很好的效果。The influence of water swelling of coal rock on reservoir was studied by means of static observation experiments and core dynamic flow experiments. The water sensitive mechanism of coal was revealed, and the control methods of the coal rock water sensitive was proposed. The experiment results show that water sensitivity of coal rock is easily happened, which damages the strata a lot. Core {low of compacted coal powder is studied, which shows that particle migration is caused by clay mineral hydration swellingand causes the drop of permeability. The damage on reservoir is irreversible, while KCI has a good effect on control of coal rock expansion.

关 键 词：煤岩 水敏 膨胀 微粒运移 入井液 防膨剂 

分 类 号：TE122[石油与天然气工程—油气勘探]