二甲醚的清防蜡与降黏效果研究  

RESEARCH ON WAX REMOVAL AND VISCOSITY REDUCTION EFFECT OF DIMETHYL ETHER

作　　者：徐靖 康露[2] 杨志[2] 李烯 倪聪 Xu Jing;Kang Lu;Yang Zhi;Li Xi;Ni Cong(Zhanjiang Branch of CNOOC(China)Co.,Ltd.,Zhanjiang 524057,Guangdong,China;Southwest Petroleum University,Chengdu 610500,Sichuan,China;Haohan Well Completion and Logging Science and Technology Limited Company,Chengdu 610500,Sichuan,China)

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东湛江524057 [2]西南石油大学,四川成都610500 [3]成都皓瀚完井岩电科技有限公司,四川成都610500

出　　处：《精细石油化工》2023年第2期6-9,共4页Speciality Petrochemicals

基　　金：中海油基金项目(CCL2019ZJFN1169)。

摘　　要：对二甲醚用于辅助石油开采进行可行性实验评价,建立了用于石油领域的气体带压测试多功能实验系统,测试了二甲醚的溶蜡、防蜡、降黏以及腐蚀性能,并与油田常用的防蜡剂和降黏剂进行了效果对比。结果表明,二甲醚的溶蜡速率为0.086 g/min,防蜡率为89.02%;二甲醚质量分数为5%时的降黏率为98.8%。在油田常用加剂量条件下,二甲醚对井下工具无腐蚀性,对乌石17-2油田高含蜡原油的防蜡效果以及对塔河不含水稠油的降黏效果均优于该油田常用的防蜡剂和降黏剂。A multifunctional gas test system with pressure in oil fields has been developed.On this basis,the wax-dissolving,wax-repelling,viscosity-reducing and corrosive properties of dimethyl ether were tested,and the effects were compared with the wax-repellents and viscosity-reducers commonly used in oilfields.The experimental results showed that at 5%dose,the wax dissolving rate of dimethyl ether is 0.086 g/min,the wax preventing rate is 89.02%,and the viscosity reducing rate is 98.8%,which are far higher than the industry and enterprise standards for the wax prevention agent and viscosity reduction agent.At the same time,dimethyl ether is non-corrosive to downhole tools at the usual dosage in oilfields.The wax preventing effect of high-waxy crude oil in WS17-2 oilfield and the viscosity-reducing effect of anhydrous heavy oil in Tahe oilfield are better than the commonly used wax preventing agents and viscosity reducing agents.Therefore,dimethyl ether has a broad application prospects as an oil production additive.

关 键 词：二甲醚 清防蜡 降黏 辅助采油 实验 

分 类 号：TQ223.24[化学工程—有机化工]