PERFORMANCEEVALUATIONOFCONTINUOUSMIXINGSALTRESISTANTFRACTURINGFLUIDLiChuhang1,2,QiaoMengzhan1,2,ChenDong1,2,LuoJiajie1,2,MaYing1,2(1.TangshanJiyouRuifengChemicalLimitedCompany,Tangshan063200,Hebei,China;2.HebeiOilfieldChemicalAgentTechnologyInnovationCenter,Tangshan063200,Hebei,China)Abstract:Anassociatedpolymersalt-resistantinstantdragreducer(MRFF)composedofsmallmole-culecationicanti-swellingagent(RF-03)andoil-wateramphiwettingagent(DE-01)wasprepared,anditsperformanceforhydroslidefracturingwasevaluatedatlaboratory.TheresultsshowedthatthedissolutionrateofMRFFwasveryfast,andtheviscosityincreaseratereached96.8%within5minsat0.8%massfraction.Theviscositywasstillpresentin8.5×104mg/Lbrine,andthedragreductionratewas70.5%.Theslickwaterfracturingsystemhasgoodcompatibilityandmeetstherequirementsofcontinuousmixing.Throughphysicalmodelexperiments,itwasfoundthatthecorepermeabilityrecoveryrateofthefracturingfluidcanreach90.85%,andtherecoveryrateisincreasedby26.86%.Thesystemhasinstantsalttoleranceandenhancedoilrecovery.Keywords:glidingwater;dragreductionagent;continuousmixing;saltresistance;recovery基于星型单体与RAFT相结合的超支化聚合物的合成与评价苏雪霞1,2,王中华1,2,孙举1,2,刘文堂1,2,刘占1,2,徐生婧1,2,彭婉莹1,2(1.中石化石油工程钻完井液技术中心,河南濮阳457001;2.中石化中原石油工程有限公司钻井工程技术研究院,河南濮阳457001)摘要:为改变线性聚合物分子链长,高温下易剪切断链,抗温抗盐能力不足等缺点,在单体及组成一定的情况,通过改变聚合物的分子构象,采用可逆加成-断裂链转移聚合(RAFT)法,基于星型单体与RAFT相结合制备得到黏度效应低、抗温抗盐能力强的超支化聚合物EHBPS-P。性能评价结果表明,EHBPS-P抗温可达220℃,加入超支化聚合物的基浆在220℃老化后黏度降低率为66.7%(同组分线性聚合物黏度降低率达90.98%),淡水、盐水、复合盐水基浆中加量为1.0%(质量分数)时,可使钻井液的滤失量控制在10.0mL以内,优于线性聚合物,有较好持续抗温性和长效的作用周期。关键词:星型单体可逆加成-断裂链转移聚合超支化聚合物抗温抗盐中图分类号:O631.1+1文献标识码:ADOI:10.20075/j.cnki.issn.1003-9384.2023.04.006随着油气田勘探开发的不断深入,深井、超深...
