文章编号：1000−7393(2023)02−0179−05DOI:10.13639/j.odpt.2023.02.008采用控压释放技术处置地层圈闭效应王军1晏凌1李洪兴1杨博仲21.川庆钻探有限公司川西钻探公司；2.川庆钻探有限公司钻采工艺研究院引用格式：王军，晏凌，李洪兴，杨博仲.采用控压释放技术处置地层圈闭效应［J］.石油钻采工艺，2023，45（2）：179-183.摘要：因井漏或者反推钻井液引起的圈闭压力给现场井控措施的制定带来较大困扰，而控压释放技术是应对钻井过程中地层圈闭效应的有效方法。在充分分析圈闭压力的特点及实钻情况的基础上，开展了圈闭压力控压释放技术的探索与实践，形成了圈闭压力控压释放配套技术，通过严格执行关井求压、控压释放、循环排污和节流降密度的工艺流程，让圈闭内流体按一定比例匀速进入井筒，逐步降低圈闭内压力，较好地解决了漏失地层形成的短期圈闭压力难题。川西南部YT1井的成功应用表明，采取合理的控压释放方法能够安全降低圈闭内压力，扩展钻井液密度窗口，在溢流与井漏的矛盾中找到压力平衡点，有利于井控安全。关键词：漏失地层；圈闭效应；控压释放；安全密度窗口；井控中图分类号：TE28文献标识码：ATreatmentoftrapeffectviapressure-controlledreleaseWANGJun1,YANLing1,LIHongxing1,YANGBozhong21.CCDCChuanxiDrillingCompany,ChuanqingDrillingCo.,Ltd.,Chengdu610051,Sichuan,China;2.CCDCDrillingandProductionTechnologyResearchInstitute,ChuanqingDrillingCo.,Ltd.,Guanghan618300,Sichuan,ChinaCitation:WANGJun,YANLing,LIHongxing,YANGBozhong.Treatmentoftrapeffectviapressure-controlledrelease［J］.OilDrilling&ProductionTechnology,2023,45(2):179-183.Abstract:Trappressurecausedbylostcirculationorinjectingdrillingfluidsintoformationsbringsgreatchallengestotheformulationofon-sitewellcontrols.Pressure-controlledreleaseisaneffectivetechniquetodealwithformationtrapeffectsduringdrilling.Afteranalyzingthecharacteristicsoftrappressureandactualdrillingdata,attemptsweremadetodevelopthepressure-controlledreleasetechniquefortrappressure.Bystrictlyimplementingthetechnicalworkflowofshut-inpressurecalculation,pressure-controlledrelease,circulatingblow-offandchoke-manifoldmud-densityreduction,thetrappedfluidsenterthewellboreataconstantrateaccordingtoacertainproportion,an...
