重复压裂裂缝延伸模拟实验研究

,,,,(,457001)[]利用人工岩心,采用室内重复压裂模拟实验的方法,研究重复压裂的造缝机理,量化造新缝的可能性及条件,为现场预测裂缝转向或创造产生新缝的条件对于选择重复压裂时机,优化压裂设计,改善重复压裂效果具有重要的指导意义[]重复压裂;压裂裂缝;新缝;模拟实验[]TE3571[]A[]10009752(2004)01009202,,,:;,,;!,;∀,,,,,,,,,,,,11实验目的及岩样制备1)实验目的,,!,,,,,2)岩样制备,,(1)3#1425#,20mm8mm220mm,;50mm4mm,45∃;165mm140mm1mm2实验步骤1),,(1,2,3)9847,1313,1641MPa,9847MPa,1641MPa%92%20043261JournalofJianghanPetroleumInstituteMar2004Vol26No1[]20031020[](1970),,1991,,2),,45∃,(4,5,6)9847,1313,1641MPa,9847MPa,1641MPa3),,,657MPa,1313MPa,1641MPa(7),:985MPa,657MPa,1641MPa(8);,657MPa,985MPa,1641MPa(9)!,328MPa,985MPa,1641MPa(10)∀,:788MPa,328MPa,1641MPa(11);,328MPa,985MPa,1641MPa(12)3实验数据及分析1/MPa/MPa/MPa/MPa/MPa19847984716418068062131398471641101510153164198471641985985498479847164112761276513139847164112531253616419847164115161230765713131641188114138985657164113839659657985164113591165103289851641597503117883281641933628123289851641110242211,0,328,656MPa,(),,,1112,,,1112,:1),0,328,656MPa,,,2),0,328,656MPa,,,,3),:;,,,4),,657MPa,5),,,657MPa,[]%93%261:ThefracturedistributionalLawsoftheblockarecalculatedanalyticallybyusingthemethodofmaincurvature,thefracturedistributionallawsindifferentlayersarediscussedincombinationwithreservoirstructuralcharacteristicsanddynamicdataanalysisOnthebasisstated,wellpatternadaptabilityisstudiedandthewellpatternintheblockisadjusted,thustheinjectionproducingsystemismoresuitabletoinsituconditionwithgooddevelopmenteffectKeywords:lowpermeabilityreservoir;verticalfracture;fractureazimuth,fractureextension;wellpatternadjustment;WendongOilfield84WellCompletionTechniqueApplicationofViscousOilWellinLiaoheOilfieldZHUYieyun,WANGYu(ChinaUniversityofGeosciences,Wuhan430074)Abstract:BecauseofthespecialityofviscousoilproducingmethodandverycomplexgeologicalconditionsinLiaoheoilregion,specialwellcompletiontechniquesareneededThusastudyisperformedonthecompletionmethodforviscousoilproductioninLiaoheOilfield,thefundamentalprinciplesofperforation,completion,sandcontrolcompletionandcompletionofexternalpipepluggingandtheiradvantages,shortcomingsandtheapplicationtoolsarediscussedKeywords:viscousoilreservoir;welldrilling;wellcementing;completion;completionquality;sandcontrol;LiaoheOilfield86ExperimentofNitrogenfoamDisplacementinViscousReservoirofBlockLeng43FUMeilong(YangtzeUniversity,Jingzhou434023)YIFaxin,ZHANGZhenhua(LiaohePetroleumExplorationBureau,Panjin124010)LIUYaowen(JianghanOilfieldBranchCompany,SINOPEC,Qianjiang433124)XIONGYanjun(ZhongyuanPetrochemicalCoLtd,SINOPEC,Puyang457001)Abstract:AccordingtotheactualreservoirsituationofBlockLeng43,asinglelayermodelforarealheterogeneityanda3layermodelforverticalheterogeneityaredenotedTheoildisplacementcapacityofnitrogenfoaminthemodelisstudiedunderdifferentgasliquidratios,differentfoamerconcentrations,temperatureandpressuretoprovideatheoreticalguidanceforfieldtestingofnitrogenfoamdisplacementinthereservoirKeywords:viscousreservoir;nitrogengas;foam;drive(Reservoir);singlelayermodel;multiplayermodel;displacementtest88ExperimentalStudyofFluidPercolatingCharacteristicsinExtremelyLowPermeableReservoirsZHANGGuangming,LIAORuiquan(YangtzeUniversity,Jingzhou434023)XUYonggao(ChangqingOilfieldBranchCompany,CNPC,Xian710060)XUWei(ZhongyuanOilfieldBranchCompany,SINOPEC,Puyang,457001)Abstract:BytakingreservoirChang6inChangqingOilfieldasanexample,anexperimentalstudyiscarriedoutontheeffectsofpressure,temperatureonthepercolatingcharacteristicsoflowpermeablereservoirsaswellasontheresultofimprovingtwophasepercolationbyaddingsurfactantTheresultdemonstratesthatinthelowpermeablereservoirs,theinitialstartingpressurecouldbereducedincrudeoil,nonDarcypercolatingcharacteristicscouldbeimprovedbyraisingtemperatureandsystempressureOilwater2phaseofcombinedflowareacanbeimprovedeffectively,thustoraisetherecoveryefficiencyofwaterinjectionbyaddingsurfactantsystemininjectedwaterKeywords:lowpermeableoilandgasreservoir;percolation;property;performancetest90DevelopmentSchemeofLowPermeabilityOilandGasFieldinPingbeiAreaGUOQingan(ChinaUniversityofGeosciences,Wuhan430074;JianghanOilfieldBranchCompany,SINOPEC,Qianjiang433124)92FractureExtensionSimulatingExperimentinRefracturingProcessLIUYingxiang,ZHAOYuxin,YANGYongping,LIFengxia,MIAOHong(ZhongyuanOilfieldBranchCompany,SINOPEC,Puyang457001)Abstract:Byusingartificialcores,themethodoflaboratoryrefracturingsimulatingexperimentisdeployedtostudythefracturemechanismoftherefracturing,quantifythepossibilityandconditionsofnewfracturesforpredictingfracturereversingandconditionsofcreatingnewfracturesintheoilfieldsIthasgreatsignificanceforinstructingtheselectionofrefracturingtime,optimizingfracturingdesignandimprovingrefracturingeffectKeywords:refracturing;fracture;newfracture;simulatingexperiment94ProductivitySimulationofDualmediumReservoirFracturewithFracturePermeabilityDependingonPressureLIYongming,GUOJianchun,ZHAOJinzhou(SouthwestPetroleumInstitute,Chengdu610500)Abstract:Onthebasisofadualporeandsinglepercolationmodel,anoilwaterpercolationmathmodelfordualmediumreservoirfracturingisestablishedinconsiderationofnaturalfractureper