改变低渗透砂岩亲水性油气层润湿性对其相渗透率的影响  

Effect of wettability alteration on the relative permeability of low-permeability water-wet oil and gas reservoirs

作　　者：任晓娟[1] 刘宁 曲志浩[1] 张宁生[3] 

机构地区：[1]西北大学地质学系 [2]中国石油勘探开发研究院 [3]西安石油大学石油工程学院

出　　处：《石油勘探与开发》2005年第3期123-124,134,共3页Petroleum Exploration and Development

基　　金：国家自然科学基金"油气储层损害的信息融合理论与方法研究"(50274059)

摘　　要：为了研究改变低渗透砂岩亲水性油气层润湿性对其气水相有效渗透率的影响,用自主研发的一种能改变亲水岩石表面性质(由亲水改为中性—弱亲油)的润湿反转剂LW1进行了实验研究。实验结果表明,用LW1处理低渗透亲水气层岩心,改变其岩石表面的润湿性后,可使气体有效渗透率平均提高1.06倍;处理低渗透亲水油层岩心,改变其岩石表面的润湿性后,可使水相有效渗透率平均提高2.6倍。认为改变低渗透亲水油气层的岩石表面润湿性,是降低其遭受侵入水伤害程度、提高增注能力和改善压裂增产过程中侵入水返排效果的有效手段之一。For studying the effect of wettability alteration on the water relative permeability of water-wet low-permeability reservoirs, LW-1 is developed and used to alter the rock surface from water wet to intermediate or weak oil wet. The experimental results show that the gas relative permeability of cores from low permeability water wet gas reservoirs was improved by 1.06 times through wettability alteration; and the water relative permeability of cores from low permeability water wet oil reservoirs was improved by 2. 60 times. It is one of the effective methods to decrease formation damage, enhance water injectivity and improve influx water flowback in reservoir stimulation.

关 键 词：润湿性 亲水 低渗透油气层 润湿反转 实验研究 

分 类 号：TE311[石油与天然气工程—油气田开发工程]