2023·02精细化工81ModernChemicalResearch当代化工研究2023·02精细化工81ModernChemicalResearch当代化工研究水基钻井液泥饼增强剂及作用机理研究＊李忠诚1陈栗1何宇1徐小红1梁梦娜2*(1.中国石油吉林油田勘探开发研究院吉林1380002.东北石油大学石油工程学院黑龙江163318）摘要：非常规致密油藏的开采，一般采用水平井固井后，射孔加大型压裂的完井工艺。其中，固井质量至关重要，直接影响到后期压裂的效果。目前，水平井的固井质量普遍不高，主要原因之一就是存在固井弱界面现象。针对上述问题，本文研发了一种泥饼增强剂，利用冲击试验评价了泥饼增强剂对聚合物钻井液的泥饼增强效果，分析了其作用机理。结果表明，在钻井液中加入0.7%～1.0%的泥饼增强剂后，泥饼强度增大到原强度的29～33倍、厚度减小37%～39%、韧性增加15%～17%。现场试验表明，使用泥饼增强剂后，固井界面胶结质量中等以上占比提升32%，泥饼增强剂具有良好的泥饼性能改善效果，可有效提高水平井固井质量。关键词：泥饼强度；固井弱界面；水平井；固井质量中图分类号：TE26文献标识码：AAnAdditiveofWaterBasedDrillingFluildforEnhancingMudCakeQualityandItsMechanisiamLiZhongcheng1,ChenLi1,HeYu1,XuXiaohong1,LiangMengna2*(1.ResearchInstituteofExplorationandDevelopmentofJilinOil-field,Jilin,1380002.SchoolofPetroleumEngineering,NortheastPetroleumUniversity,Heilongjiang,163318)Abstract：Fortheexploitationofunconventionaltightoilreservoirs,thecompletiontechnologyofperforationandlarge-scalefracturingaregenerallyadoptedafterwellcementing,andthecementingqualityisacrucialfactor,whichdirectlyaffectstheeffectoflaterfracturing.Atpresent,weakcementinginterfaceisthemainreasonstodecreasethecementingqualityofhorizontalwells.Amudcakestrengtheningadditivewasdevelopedinthispaper.Thestrengtheningeffectofmudcakestrengtheningagentonpolymerdrillingfluidwasevaluated,besidestheeffectonthemainpropertiesofpolymerdrillingfluidwasinvestigatedanditsmechanismwasanalyzed.Theresultsshowthatthemudcakestrengthincreasesto29~33times,thethicknessdecreasesby37%~39%andthetoughnessincreasesby15%~17%afteradding0.7%~1.0%mudcakestrengtheningadditiveintodrillingfluid.Fieldtestsshowthattheproportionofcementingqualityabov...
