长效复合泡沫体系在杏树岗油田的应用.pdfVIP

2011年8月 大庆石油地质与开发 Aug．，2011 第30卷第4期 Petroleum GeologyandOilfeldDevelopmentinDaqing VolJ30No．4 DOI：10．3969／J．ISSN．1000—3754．2011．04．028 长效复合泡沫体系在杏树 岗油田的应用 王 冰 (大庆油田有限责任公司采油工程研究院，黑龙江 大庆 163453) 摘要：针对大庆杏树岗油田目前出现高水淹问题，研究出一种长效复合泡沫体系。该泡沫体系半衰期达到54h， 发泡体积在475mL以上，适合温度低于50℃、矿化度小于 1O L的油藏。均质岩心实验表明，水驱后注入泡 沫段塞，采收率可增加 17％。杏7-1—33井现场试验表明，措施后连通油井受效情况发生改变，增油降水效果明 显，井组累计增油3168t，投人产出比达到1：3．68。该泡沫体系能有效地抑制注入水沿高渗透部位突进，提高 了驱油效率，可以满足杏树岗油田高渗透储层注水开发的要求。 关 键 词：泡沫剂；发泡体积；半衰期 中图分类号：TE357．462 文献标识码：A 文章编号：1000．3754 (2011)04-()119-04 APPLICATIoN oF CoMPoUND ENDURING．EFFECT FOAM SYSTEM IN XINGSHUGANG oILFIELD WANG Bing (ProductionEngineeringResearchInstituteD厂DaqingOilfieldCompanyLtd．，Daqing163453，China) Abstract：Aimingatthecurrentlyhighwatered—outproblem ofXingshugangOilfieldinDaqingOilfield，onekind ofcompoundenduring·effectfoam system hasbeendeveloped．Thehalf-lifeperiodofthissystem is54hours，the foamingvolumeisabove475ml，anditissuitableofrthereservoirswiththetemperaturebelow50oC andthesalini- tylessthan10g／L．Theresultofhomogeneouscoreexperimentsshowsthattherecoveryfactorcanbeincreasedby 17％ byinjectingofamslugafterwaterflooding．ThefeldtestofWellXing7-1—33showsthattheresponseofthe connectedoilproducershaschangedaftertreatmentwithobviousincreaseofoilproductionrateanddecreaseofwa— tercut．Thecumulativeincrementaloilproductionratefrom thewellgrouphasreached3186twiththeinput／out— putratioof1：3．68．Thisofamsystemcaneffectivelypreventtheinjectedwaterfromadvancingsuddenlyalongthe highpermeabilitypartandimprovethedisplacementefficiencyaswell；thereforeitcansatisfythedemandsofwa— terfloodingdevelopmentofhigh-permeabilityreservoirsinXingshugangOilfield． Keywords：foam agent；foamingvolume；half-life