一种新型天然气压缩因子数值计算方法(2)

Abstract：InterwellcommunicationisincreasinglyseenintheupperShaximiaogasreservoiroftheXinchanggasfieldduetofractu-ringoperation．Thispapercomprehensivelyanalyzesearthstress，fracturingfracturemonitoring，pressuredropinwellblock，timeofinterwellcommunication，andinterwellazimuthrelationship，generalizesthatfracturingfracturedevelopmentisthemainreasonforinterwellcommunication．Gaswellfracturingcanleadtosandproductionandplugginginadjoininggaswells．Onthisbasis，threepreventivemeasuresofinterwellfracturingcommunicationareproposed：theorientationofearthstressandfracturedevelopmentshallbefullyconsideredwhenplacinginfillwellsinagasreservoir；thetechnologyofperforationandfracturingshallbeoptimized；andtheadjoiningwellsshallbeshutintobuilduppressurewhenperformingfracturingoperation．

Keywords：interwellcommunication；fracturingfracture；earthstress；sandproductionmechanism；Xinchanggasfield；upperShaximiaogasreservoir

Studyandapplicationoffracturepropagationmodelofmultiplesandfracturing

2

LIUChun－lin1，，WANGRui3

（1．ChinaUniversityofPetroleum，Beijing102249，China；2．Xi’anShiyouUniversity，Xi’an，Shaanxi710065，China；

3．JidongOilfieldCompany，PetroChina，Tangshan，Hebei063000，China）

Abstract：Inmultiplesandfracturingprocess，theheightofsandbankhascertaininfluenceonfluidflowinfracturesandsubse-quentproppantsettlement．Apseudo3Dmodelisbuilttopredictfracturepropagationinmultiplesandfracturingprocessthroughnu-mericalsimulation．Themodelincludescontinuityequation，pressuredropequation，andfracturewidthandheightequationoffrac-turingfluidflowinginfractures．Thepressuredropequationisbasedontheplateflowtheoryandmechanicequilibriumprinciple，anditsdifferencefromconventionalpressuredropequationisthatittakestheeffectofsandbankheightonfluidflowintoaccount．Thecomputationshowsthatmultiplefracturingismoreeffectiveinincreasingproductionthanconventionalfracturing．Fieldtestshowsthatmultiplefracturingisaneffectivereservoirstimulationmethodandhassignificantmeaningtoimprovingoilproduction．Keywords：fracturing；multiplesandinput；sandbank；fracture；pressuredrop；Hua152blockoftheChangqingoilfieldProductivitystudyoflow－velocitynonlinearflowinlowpermeabilitytightgasreservoirs

SONGHong－qing1，HEDong－bo2，LOUYu1，YIHuai－jian1，ZHUWei－yao1

（1．UniversityofScience＆TechnologyBeijing，Beijing100083，China；

2．ResearchInstituteofPetroleumExplorationandDevelopment，PetroChina，Beijing100083，China）

Abstract：Lowpermeabilitytightgasreservoirsareclassifiedintothreecategoriesaccordingtoformationwateroccurrences．Mathe-maticalmodelsareestablishedforseepageflowindifferentreservoirsbytakingaccountofslippageeffect，stresssensitivityandthresholdpressuregradientrespectivelyandsimultaneously．Productivityformulasarederivedforlow－velocitynonlinearflowinthethreecategoriesoflowpermeabilitytightgasreservoirs．Numericalanalysisshowsthat，comparedwithtraditionalDarcyflow，theproductivityoflowvelocitynonlinearflowinlowpermeabilitytightgasreservoirsisquitedifferentunderdifferentflowregimes．Whenproducingpressuredropisbig，stresssensitivityhasgreatereffectongaswellproductivity．Intheproductionprocessoflowpermeabilitytightgasreservoirs，productivityequationscorrespondingtospecificflowregimeshallbechosenaccordingtothewatercontentofagasreservoir．Largedrawdownpressureandacceleratedproductionshallbeavoided．

Keywords：lowpermeabilitytightgasreservoirs；low－velocitynonlinearflow；slippageeffect；stresssensitivity；mathematicalmodel；productivityequation

NumericalsimulationoftheburiedhillreservoirintheSudeerteoilfield

WUWei

（DaqingOilfieldCompanyLimited，PetroChina，Daqing，Heilongjiang163712，China）

Abstract：Theinfluenceofdifferentfracturepropertiesonburiedhillreservoirdevelopmentresponsehasbeensimulatedwithadual－porositydual－permeabilitymodelbyusingtimevarianttechnique．Thetrendofoilandwatermigrationandremainingoildistri-butionisanalyzedandpredictedforburiedhillreservoirundertheconditionoffractureinfluence．Predictionofthedevelopmentre-sponsesofdifferentwellpatternsandwaterinjectionschemescanguideoilfieldinfillmodification．Amodificationplanofwellpat-ternandwaterinjectionschemehasbeenproposedaccordingtothegeologicfeatureoftheSudeerteoilfieldandhasobtainedgooddevelopmentresult．

Keywords：fracturedburiedhillreservoir；dualmedia；numericalsimulation；developmentmodification；SudeerteoilfieldAnewcomputingmethodofgascompressibilityfactor

GUANHong－xiang1，DUANGuo－xi2，QITao1，LIWei1，LIWei－chao1

（1．CNOOCResearchInstitute，Beijing100027，China；2．TianjinBranchofCNOOC，Tianjin300452，China）

Abstract：Compressibilityfactorisoneoftheimportantparametersofnaturalgas．Traditionalcomputingmethodhasbigerrorin

calculationofsuperhighpressurenaturalgas．Thispapermatchesthetraditionalcompressibilityfactorwiththeexperimentaldataofsuperhighpressuregascompressibilityfactor，andobtainsaformulaofcompressibilityfactorforbothmid－lowandhighpressureconditions．Thecomputationshowsthattheaverageerroris3．3%forlowpressureintervaland2．5%forhighpressureinterval．Gaswellpressurehasbeencalculatedbyapplyingthisformula，andhighcalculationaccuracyhasbeenachieved．

Keywords：compressibilityfactor；naturalgas；conventionalgaswell；hightemperaturehighpressuregaswell；computingmethodAnapproachtosimilaritymethodofexperimentofremainingoildistributionafterwaterflooding

WANGJin－lin，TIANJin－jie，WANGJing－bo，HUANGBo，LIUFu－hai（CNOOCEnergyTechnology＆ServicesLimited，Tianjin300452，China）

Abstract：Thesimilaritymethodsofphysicalsimulationofoildisplacementexperimentgeneratemanysimilaritycriteria．There-quirementonmodelconstructionisrelativelyhighandtherealizationisdifficult．Accordingtotheresearchonremainingoildistribu-tionafterwaterfloodinganddevelopmentperformance，thispapercombinesgeometricmethodwithequationmethod，recognizesthattherealvelocity（movementvelocity）ofseepageflowisthesameandthegeometrychan …… 此处隐藏：6455字，全部文档内容请下载后查看。喜欢就下载吧 ……