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煤层气储层阳离子交换容量及其对煤岩物性的影响 被引量:1

Coalbed Methane′s CEC and Its Influence on Coal′s Physical Property
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摘要 采用氯化铵-酒精分光光度法测定煤岩中的粘土矿物阳离子交换容量,以了解煤岩的物性,并通过水敏实验进行了验证。研究结果表明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,煤层气储层损害的可能性就越大;衡量煤岩粘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/100g,也不能忽视煤岩粘土的水化膨胀,需要与水敏实验相结合来判断水化作用对储层造成的伤害。 In order to study the coal's physical property, this research made use of ammonium chloride - alco- hol optical spectroscopy to measure clay's CEC in coal, and verified it through water sensitivity experiment. The study indicated that CEC had a close connection with water sensitivity damage. The more CEC, the stronger potential water sensitivity, the more damage probability in coalbed methane; There is a difference be- tween coal and abnormal reservoir in CEC's yardstick, although the CEC less than 9 mmol/100g, clay's hy- drated swelling can't be neglected, CEC should be connected with water sensitivity experiment to judge the reservoir damage inducing by hydration.
作者 汪伟英
出处 《中国煤层气》 2011年第4期22-25,共4页 China Coalbed Methane
关键词 煤层气 阳离子交换容量 水敏 储层伤害 Coalbed methane CEC water sensitivity reservoir damage
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