第42卷第02期（2023-02）油气田地面工程https://yqtd.cbpt.cnki.net行业论坛胍胶压裂返排液循环配制过程中残余硼控制技术研究*同霄李岩席佳欣邱奇长庆油田分公司油气工艺研究院·低渗透油气田勘探开发国家工程实验室摘要：胍胶压裂液是目前油气田开发应用最为广泛的压裂液体系之一，返排液中存在一定量的残余交联剂，在重复配液过程中会出现提前交联的问题，因此开展了丙三醇、乙二醇、甘露醇、木糖醇等多羟基化合物对返排液中残余硼的掩蔽实验。实验结果表明：采用与硼摩尔比为2∶1的甘露醇作为掩蔽剂，可降低提前交联的不良影响。针对压裂返排液的水质特点和回用指标，采用“絮凝沉淀+离子控制+两级过滤”为主的胍胶压裂返排液处理工艺，处理后悬浮物去除率95.6%、钙镁离子去除率72.6%、硼去除率71.5%，压裂返排液处理后直接配制胍胶压裂液，未出现提前交联的情况，与清水配制的胍胶压裂液相比，耐温、耐剪切性能满足现场施工的要求。关键词：压裂返排液；胍胶；多羟基化合物；残余硼；掩蔽StudyonResidualBoronControlTechnologyintheCirculatingPreparationofGuani⁃dineGumFracturingFlowbackFluidTONGXiao，LIYan，XIJiaxin，QIUQiOilandGasTechnologyResearchInstituteofChangqingOilfieldCompany·NationalEngineeringLaboratoryforExplorationandDevelopmentofLow-permeabilityOilandGasFieldAbstract：Guanidinegumfracturingfluidisoneofthemostwidelyusedfracturingfluidsystemsinoilandgasfielddevelopment.Thereisacertainamountofresidualcrosslinkingagentintheflowbackliq-uid，whichwillcausetheproblemofcrosslinkinginadvanceintheprocessofcirculatingpreparation,sothemaskingexperimentofresidualboroninflowbackliquidbypolyhydroxycompoundssuchasglycer-ol，ethyleneglycol，mannitol，andxylitoliscarriedout.Theexperimentresultsshowthatmannitolwithmolarratioof2:1toboroncanbeusedasthemaskingagenttoreducetheadverseeffectofadvancedcrosslinking.Accordingtothewaterqualitycharacteristicsandreuseindexesoffracturingflowbackfluid，theguanidinegumfracturingflowbackfluidtreatmentprocesscenteredon“flocculationsedimentation+ioncontrol+two-stagefiltration”hasbeenused.Aftertreatment，theremovalratesofsuspendedsolids，calciumandmagnesiumions，andboronare95.6%，72.6%and71.5%respectively.T...
