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《【7A文】An introduction of injection wells washing methods(注水井洗井方法).pptx》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、Anintroductionofinjectionwellswashingmethods注水井洗井方法IntroductionNecessityOperationmethodEffectionConclusionsAcknowledgmentOutlineImprovethequalityofwaterinjectionofoilfield,inrelationtotheultimaterecoveryofoilfield,relatedtothesustainabledevelopmentofoilfieldeffectively.Improveinje
2、ctionWellswashingqualityistheimportantlinktoimprovethequalityofwaterinjection,andensurethatoilfieldinjectgoodwater,injectenoughwater.Weknow,asthetimeofwaterinjectionprolonged,thecauseoftheinjectedwaterquality,somescaleandimpuritywilladsorbonoiltubingandnearwellborearea,causingpoll
3、ution,decreasedwaterabsorptioncapacity,andtheoilpressurerise,thewaterinjectionratedrop.AndtheconventionalmethodtochangethissituationistowashinjectionWells.Inrecentyears,asenvironmentalprotectionrequirementsriseceaselessly,washingwellliquidofinjectionWellsarestrictlyprohibitedtothe
4、emissions,injectionwellcanonlybewashedbyAirtightwell-flushingdeviceorWellwashingvehicle,washwellliquideventuallyreturntooilandgasgatheringtransportationsystemrecycling.Airtightwell-flushingdeviceandWellwashingvehicle,duetotheconstraintofwashwell’sconditions,well-washingtimeandwash
5、wellemissionsarecertainlimits,sotherewillbepartoftheinjectionwellsnotreachwelleffectafterwashing.Sohowtoexploreandimproveexistinginjectionwellwashingmethodandwellwashingqualityisasubjectthatwehavetofaceintheexistingconditions1.NewWellsmustbewashedbeforeturnintothewaterinjectionwel
6、ls(waterinjectiontest)2.Foundunqualifiedwaterinjection,towashthewellintime3.NormalinjectionWellsinthesamepressure,theinjectedwaterratelowerthantestfallbymorethan15%,forthewellswhichinputpackerofflushwater,shouldbewashedinthewell.forthewellswhichinputpackerofnoflushwater,shouldbepu
7、toverflow,spitwater4.Cyclewaterinjection,winterstopnotewell,drillingandshut-inwaterinjectionandotherspecialreasonsrecoveryshut-inmorethan15daysoftheinjectionWells,washingwellbeforeopening5.Operationmustbewashedasrequiredbeforeopening.forthewellswhichinputpackerofnoflushwellmustbew
8、ashedbeforethepackerreleasedThein
