岩心表面润湿性与化学选堵剂对油水的封堵能力.pdfVIP

浙 江 大 学 学 报(理学版) 第 32卷第 2期 JournalofZhejiangUniversity(ScienceEdition) Vol.32No.2 /sci Mar.2005 2005年3月 http://www.jou 岩心表面润湿性与化学选堵剂对油水的封堵能力 范振中 俞庆森 (浙江大学化学系 浙江杭州310027) 摘 要:选择阳离子聚丙烯酞胺类选堵剂，进行岩心模拟实验，研究不同岩心表面润湿性与化学选堵剂封堵能力之 间的关系表面润湿性强烈影响对水的堵塞率，水润湿性越强，对水的堵塞率越高，典型的亲水表面和亲油表面对 水的堵塞率相差20%左右;使用水基凝胶，水驱后的残余阻力系数(RRF)大于油驱后的RRF，水基凝胶使水相渗 透率的降低比油相渗透率的降低多.对于润湿性相同，渗透率不同的天然岩心，选堵剂的堵水率大于850o，堵油率 在20%左右，表现出良好的选择性. 关 键 词:化学选堵剂;表面润湿性;堵塞率;油田化学 中图分类号:0643.36;TE357.46 文献标识码:A 文章编号:1008-9497(2005)02-198-03 FANZhen-zhong，YUQing-sen(DepartmentofChemistry,ZhejiangUniversity,Hangzhou310027，China) Surfacewettingpropertyofcornanditsinfluenceondifferentpluggingabilitiestooilandwaterusingselective pluggingagent.JournalofZhejiangUniversity(ScienceEdition)，2005,32(2):198^-200 Abstract:Withthechemicalselectivewater-pluggingagentofcationpolyacrylamidetype，thecornsimulationex- perimentswerecarriedout.Therelationshipbetweenthesurfacewettingabilityofcornsandthepluggingabilities oftheselectivepluggingagentwasinvestigated.Itfollowsthatthesurfacewettingabilityhasobviouseffectson thewater-pluggingrate.Thestrongerwaterwettingis，thehigheristhewater-pluggingrate.Thepluggingrate differencebetweenthetypicalhydrophilicsurfaceandlipophilicsurfaceisabout2000.Usingthewatergel，the residualresistancefactor(RRF)afterwaterdriveishigherthanthatafteroildrive.Thedecreaseofwaterperme- abilityislargerthanthatofoilpermeabilitywhenwatergelisused.Forthecornswithsamewettingabieitybut differentpermeability,thewater-pluggingrateofpluggingagentisgreaterthan850oandtheoil-pluggingrateis about20%.Thepluggingagenthasgoodselectivity. Key