国内注聚井堵塞及化学解堵技术研究进展(3)

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BlockageCreationinPolymerInjectionWellsandChemicalWaysofBlockageRemoval:AReview

ZHANGGuang2Yan1,WANGZhi2Yong2,LIUYan2Tao3,ZHANGYun2Zhi1,ZHAOLing1

(1.ProductionTechnologyResearchInstitute,ShengliOilfieldCompanyLtd,Dongying,Shandong257068,PRofChina;2.GudaoOil

ProductionFactory,ShengliOilfieldCompanyLtd,Dongying,Shandong257231,PRofChina;3.ShengliPetroleumAdministrationBureau,Dongying,Shandong257068,PRofChina)

The2ndDownholeServicesCompany,

Abstract:Theblockagecreationinpolymerinjectionwellsandtheblockageremovaltechnologiesarereviewedonthedatapublishedin33papersinrecenttenyearsin3topics:compositionanalysesofblockagesubstances;originationandmechanismsofblockageformation,andchemicalwaysofblockageremoval.Theresultsofanalysesindicatethatthefieldblockagessamplesareallmixturesofinorganicandorganicsubstances.Theoriginationandmechanismsofblockageformationinpolymerinjectionwellsarepresentedin6aspects:adsorptionandretentionofpolymers;imcompatibilityofpolymermolarmasswithreservoirporethroatsize;formationfinesmigration;bacterialfloraandmetabolite;polymerclustersinitiatedbyinorganics;andinadequateproceduresofpolymersolutionpreparationandthinning.Astoblockageremovingtechnologies,7blockageremovingagentsforpolymerand,particularly,gellingorgelledpolymerinjectionwells,includingClO2based,basedonstrongoxidantotherthanClO2,andcontainingnostrongoxidant,and5fieldcasesofreservoirblockageremovalinlotsofinjectionwells.

Keywords:　reservoirblockage;injectionwells;polymers;polymergels;blockagecreatingmechanisms;blockageremoving

agents;blockageremovingtechnologies;review