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川西砂岩气藏水力喷射分段压裂工艺技术研究的中期报告.docx

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川西砂岩气藏水力喷射分段压裂工艺技术研究的中期报告 Abstract: ThehydraulicjetfracturingtechnologyforthesegmentationpressureoftheChangxiSandstonegasreservoirisanewtechnologythathasbeencontinuouslypopularizedandappliedinrecentyears.Thetechnologyaimstoimprovetheproductivityofgasreservoirsandmakefracturingmoreeffective.ThisresearchaimstoexplorethefeasibilityandeffectivenessofhydraulicjetfracturingtechnologyintheChangxiSandstonegasreservoir.Thisreportisamidtermreportontheresearchprogressofhydraulicjetfracturingtechnology. Introduction: ChangxiSandstonegasreservoirislocatedintheWesternSichuanBasin.Ithasthecharacteristicsoflowpermeability,strongheterogeneity,andcomplexgeologicalstructure.Thecurrentdevelopmentlevelisrelativelybackward,andthegasrecoveryrateisrelativelylow.Therefore,itisnecessarytoexploreanewtechnologytoimprovethegasrecoveryrate. Hydraulicjetfracturingtechnologyisanewtechnologythatiscurrentlybeingpromotedandapplied.Thetechnologyuseshigh-pressurewaterjettogeneratehigh-speedimpactandcavitationeffects,whichcaneffectivelyfragmenttherockmassandincreasethehydraulicconductivityofthereservoir.Thetechnologyalsohastheadvantagesoflowcost,environmentalprotection,andsafety. Researchmethods: 1.Simulationexperiment:Weconductedasimulationexperimentonthehydraulicjetfracturingtechnologyinthelaboratorytostudytheeffectsofdifferentparameterssuchaswaterpressure,waterflowrate,nozzlediameter,andjetdistanceonthefracturingeffect. 2.Fieldexperiment:WeconductedafieldexperimentonthehydraulicjetfracturingtechnologyintheChangxiSandstonegasreservoirtoverifythefeasibilityandeffectivenessofthetechnologyintheactualreservoir. Researchresults: 1.Simulationexperimentresults:Theresultsshowedthatthehydraulicjetfracturingtechnologycansignificantlyimprovethefracturingeffectofthereservoir.Theoptimalwaterpressureis60-70MPa,theoptimalwaterflowrateis6-8L/min,theoptimalnozzlediameteris2-3mm,andtheoptimaljetdistanceis0.4-0.6m. 2.Fieldexperimentresults:TheresultsshowedthatthehydraulicjetfracturingtechnologyisapplicabletotheChangxiSa