表面活性剂对煤岩润湿性及相对渗透率的影响  

Effect of Surfactant on Coal Wettability and Relative Permeability

作　　者：汪伟英[1] 田中兰 杨林江[1] 杨恒林 欧阳云丽[1] 张承洲[1] 

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),湖北武汉430100 [2]中国石油集团钻井工程技术研究院,北京100195

出　　处：《长江大学学报（自科版）（中旬）》2015年第1期79-82,7,共4页Journal of Yangtze University(Nature Science Edition)

基　　金：国家科技重大专项(2011ZX05036-001)

摘　　要：采用煤粉自吸法,分别研究了阴离子表面活性剂——石油磺酸盐和阳离子表面活性剂——十六烷基三甲基溴化铵与煤岩接触后,对煤岩表面润湿性的影响。通过稳定法测定了煤岩吸附活性剂和气-液界面张力改变对煤层气储层气-液两相相对渗透率曲线的影响。试验结果表明,煤岩表面润湿性呈弱亲水性,在吸附阴离子表面活性剂后煤岩亲水性增强,气相相对渗透率下降,液相相对渗透率升高。阳离子表面活性剂对润湿性改变作用较小,气液界面张力降低后,气相相对渗透率升高,有利于煤层气产出。By using the method of spontaneous imbibition of coal powder,the effect on the coal surface wettability after it contacted with the anionic surfactant-mahogany sulfonate as well as the cationic surfactant-cetyl trimethylammonium bromide was studied.Through steady-state method,the impacts of surfactant adsorption and gas-liquid interface tension change on gas-liquid relative permeability curve of CBM reservoir were determined.Experimental results show that the coal surface is slightly water wet,and the hydrophilicity of coal becomes stronger after adsorption of anionic surfactant,and that the gas relative permeability decreases while the liquid relative permeability increases.The influence of cationic surfactant on wettability is small,when the gas-liquid interface tension decreases,the gas relative permeability increases,which is beneficial for the production of coal-bed methane.

关 键 词：入井液 煤岩 煤层气 气-液相对渗透率 表面活性剂 

分 类 号：TE357.469[石油与天然气工程—油气田开发工程]