煤层气储层阳离子交换容量及其对煤岩物性的影响  

Positive Ion Exchange Volume of Coal Bed Methane Reservoir and Influence to Coal Physical Natures

作　　者：汪伟英[1] 马丽[1] 原晓珠[1] 夏健[2] 石惠宁[2] 孙玉英[2] 

机构地区：[1]油气资源与勘探技术教育部重点实验室(长江大学),湖北荆州434023 [2]中石油华北油田分公司,河北任丘062550

出　　处：《煤炭科学技术》2011年第9期118-120,共3页Coal Science and Technology

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：为了解煤岩物性,采用氯化铵-酒精分光光度法测定煤岩中的黏土矿物阳离子交换容量,并通过水敏试验进行验证。沁水煤田凤凰山和寺河矿的阳离子交换容量试验结果表明:寺河矿因水敏产生的煤层损害可能性大于凤凰山;水敏性试验研究则证明了凤凰山无水敏伤害,寺河矿存在较强的水敏伤害;阳离子交换量与水敏伤害紧密相关,阳离子交换容量越大,储层潜在水敏性亦强;衡量煤岩黏土阳离子交换容量的大小区别于常规的油藏,即使阳离子交换容量小于9 mmol/100 g,也不能忽视煤岩黏土的水化膨胀,要与水敏试验相结合来判断水化作用对储层造成的伤害。In order to understand the coal physical natures,the ammonium chloride-alcohol spectral luminosity method was applied to measure the positive ion exchange volume of the clay mineral in coal and the water sensitivity experiment was verified.The experiment results of the positive ion exchange volume in Fenghuangshan Mine and Sihe Mine of Qinshui Coalfiled showed that the seam failure possibility occurred by the water sensitive in Sihe Mine would be higher than Fenghuangshan Mine.The study on the water sensitivity experiment showed that there would be no water sensitivity danger in Fenghuangshan Mine and there would be high water sensitivity danger occurred in Sihe mine.The positive ion exchange volume would be closely related to the water sensitivity danger.The higher positive ion exchange volume,the higher water sensitivity of the reservoir in potential would be.To judge the positive ion exchange volume of the clay in the coal would distinguish on the conventional oil reservoir.When the positive ion exchange volume was less than 9 mmol/100 g,the hydrated swelling of the clay in the coal could be ignored and should judge the hydrated function to the danger of the reservoir in combined with the water sensitivity experiment.

关 键 词：煤层气 阳离子交换容量 水敏 水化作用 分光光度法 储层伤害 

分 类 号：P631.81[天文地球—地质矿产勘探]