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1、第37卷第5期石油钻采工艺Vol.37No.52015年9月OILDRILLING&PRODUCTIONTECHNOLOGYSept.2015文章编号：1000–7393（2015）05–0104–05doi:10.13639/j.odpt.2015.05.026低渗油藏纳米粉体堵剂性能评价及应用龚险峰 祝明华 吴广涛 王成军 张巧玲（中国石化中原油田分公司采油三厂，山东莘县 252429）引用格式：龚险峰，祝明华，吴广涛，等.低渗油藏纳米粉体堵剂性能评价及应用［J］.石油钻采工艺，2015，37（4）：104-108.摘要：针对常规无机颗粒堵剂不适合特低渗砂岩油藏卫360块挤堵的问题，
2、对纳米粉体堵剂的性能进行了室内综合评价。33密度1.4~1.8g/cm堵剂浆体的黏度小于35mPa·s，注入性好，能进入地层深部孔隙；悬浮性好，密度大于1.6g/cm时，浆体基本不分层；固化时间可调，施工安全，初凝时间2.7~18.5h，终凝时间3.1~28.1h；固化后体积不收缩，抗压强度大于25MPa，封堵率达到99.9%；具有一定的溶解性，渗透率恢复率大于50%。介绍了现场挤堵工艺，掌握挤堵关键环节和精细施工能提高挤堵一次成功率。在低渗油藏卫360块应用27井次，工艺成功率100%，增油有效率100%。纳米堵剂是一种高效新型堵剂，施工安全性好，措施成功率高，对低孔低渗地层具有较好的
3、封堵作用。关键词：低渗透油藏；超细油井水泥；纳米堵水剂；性能评价中图分类号：TE358 文献标识码：AEvaluationonperformanceofnano-powderpluggingagentanditsapplicationinlow-permeabilityreservoirsGONGXianfeng,ZHUMinghua,WUGuangtao,WANGChengjun,ZHANGQiaoling（No.3OilProductionPlantofSINOPECZhongyuanOilfieldCompany,shenxian252429,China）Abstract:Inv
4、iewoftheproblemofconventionalparticulatedinorganicpluggingagentbeingnotsuitableforWei360Blockwhichisalowpermeabilityreservoir,anindoorcomprehensiveevaluationwasconductedontheperformanceofnano-powderpluggingagent.Theviscosityofpluggingagentfluidwithdensityof1.4~1.8g/cm3islessthan35mPa·s,soithasgoo
5、dinjectivityandcanenterdeepporesintheformation.Italsohasfavorablesuspensionproperty,whenitsdensityisgreaterthan1.6g/cm3,thefluiddoesnotdelaminate.Itscuringtimecanbeadjustedanditcanbeusedsafely.Itsinitialsettingtimeis2.7hto18.5h,andfinalsettingtimeis3.1hto28.1h.Afterbeingset,itsvolumewillnotshrink
6、,itscompressivestrengthisover25MPa,andtherateofpluggingisupto99.9%.Ithascertainsolutionproperty,andtherecoveryrateofpermeabilityisover50%.Thispaperintroducesthefieldpluggingtechnology,andknowledgeofkeypluggingpointsandfineoperationcanincreasetheone-timesuccessrateofplugging.Thispluggingagenthasbe
7、enusedin27wellsinWei360Blockoflowpermeabilityreservoir,andthetechnologicalsuccessrateis100%,andtheeffectiverateofincreaseinoilproductionis100%.Nano-powderpluggingagentisahighlyeffectivenewpluggingagentwithgoodjobsafety
