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考虑应力敏感的低渗致密砂岩气藏数值模拟研究.docx

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考虑应力敏感的低渗致密砂岩气藏数值模拟研究 Title:NumericalSimulationStudyofStress-SensitiveLow-PermeabilityTightSandGasReservoirs Abstract: Numericalsimulationisanessentialtoolforunderstandingandoptimizingtheproductionperformanceofunconventionalreservoirs.Inthispaper,weinvestigatetheimpactofstresssensitivityonlow-permeabilitytightsandgasreservoirsthroughacomprehensivenumericalsimulationstudy.Thestudyaimstoprovideinsightsintoproductioncharacteristicsandoptimizeproductionstrategiesinsuchreservoirs. 1.Introduction: Low-permeabilitytightsandgasreservoirsarecharacterizedbytheirlowporosityandpermeability,makingitchallengingtoextractnaturalgaseconomically.Recently,thestresssensitivityofthesereservoirshasgainedsignificantattentionduetoitsinfluenceonproductionbehavior.Theobjectiveofthisresearchistoassesstheimpactofstresssensitivityonreservoirperformanceusingnumericalsimulationtechniques. 2.Methodology: 2.1.ReservoirCharacterization: Adetailedreservoircharacterizationisperformed,includinggeologicalandpetrophysicaldatacollection,wellloganalysis,andcoresamplestudy.Therockproperties,suchasstresssensitivity,areincorporatedintothenumericalreservoirmodel. 2.2.NumericalSimulationModelSetup: Athree-dimensionalnumericalsimulationmodelisconstructedbasedonthereservoircharacterizationdata.Thesimulatorconsidersfluidflow,rockmechanics,andstress-dependentreservoirproperties.Specialattentionisgiventoaccuratelycapturethenon-linearstress-strainbehaviorofthelow-permeabilitytightsandgasreservoirs. 2.3.ReservoirPerformanceAnalysis: Severalscenariosaresimulatedtoanalyzetheimpactofstresssensitivityonreservoirperformance.Sensitivityanalysesareperformedbyvaryingparameterssuchasreservoirstress,completionmethods,andproductionstrategies.Keyperformanceindicators,includinggasproductionrate,cumulativerecovery,andpressuredistribution,aremonitoredandevaluated. 3.ResultsandDiscussion: Thesimulationresultsrevealthesignificantinfluenceofstresssensitivityonproductionbehaviorinlow-permeabilitytightsandgasreservoirs.Stress-inducedperm