水平井蒸汽驱相似准则研究

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1、利用和似准则指导室内物理模拟实验对现场开发有重要的指导意义。对于日益重要的稠汕來说，蒸汽吞吐开发方式的缺点逐渐暴露出來，而水平井蒸汽驱则是其主耍的接替技术，有必要对其进行三维物理模拟研究。本文在建立水平井蒸汽驱及水平井化学剂蒸汽驱的数学模型基础上，推导出了完整的相似准则数群，进行了原型、室内模型的参数转换。并对相似准则进行了正确性检验及敏感性分析。为了提高实验的成功率，缩短室内试验的时间，利用数值模拟软件对水平井SAGD、双水平井蒸汽驱等物理模拟进行了参数优化。最后通过正交设计为室内三维物理模型实验确定了实验方案。结果表明，所推导的相似准则较为合理，可以指导室

2、内试验。数值模拟研究表明随着蒸汽干度、注汽速率的增加，采收率提高。加入化学剂后，可以提高采收率,但是随着药剂浓度的增加，采收率增加的幅度逐渐减小。以SAGD为例，经过正交试验确定如下的实验方案：蒸汽干度为0.8,注汽速率为0.85m7D,采注比为1.4。木论文研究内容对于室内试验及现场稠油油藏的开发具有参考价值。关键字：水平井；相似准则；数值模拟；参数优化AbstractLaboratoryexperimentsofthree-dimensionscaledmodelwhichisbuiltbyscalingcriteriaisimportantguidesf

3、orin-situexploitation.Forheavyoilreservoir,theshortcomingofhuffandpuffwasexposedgradually,thenthehorizontalwellssteamfloodingwasthemainreplacementtechnique,soit'snecessarytoresearchthistechniquebyscaledmodel.Inthispaper,onthebaseofestablishmentofthemathematicalmodelsforhorizontalwel

4、lssteamflooding,afullsetofscalinggroupswerederived.Thenusedthesimilaritycriteriatomaketheparametertransformationbetweentheprototypeandmodel.Andmadethecorrectnessverificationandsensitivityanalysisofthescalingcriteriaatthesametime.Inordertoimprovethesuccessfulrateandcutdownthelaborato

5、ryexperimentperiod,severalkindsofdevelopmentmode,whicharethehorizontalwellssteamassistantgravitydrainage(SAGD),doublehorizontalwellssteamflooding,formodelwereresearchedbyusingnumericalsimulator.TheParameterOptimizationfortheseProcesseswasanalysedandstudied・Inaddition,theexperimental

6、programfor3Dmodelwasdeterminedbyorthogonaldesign.Theresultsshowthatthescalingcriteriaisreasonable.Itcanbeusedtoguidetheexperiments.Theresearchofnumericalsimulationshowsthatwithincreasingsteamqualityandsteaminjectionrate,therecoverywasincreased.Theadditionofthechemicalagentcanleadtoa

7、remarkableimprovementofoilrecovery,butwithincreasingChemicalconcentration,theincreasingextentwasdecreased・TakeSAGDforexample,theexperimentalprogramwhichwasdeterminedbyorthogonaltestasfollow:steamqualityisO•&steaminjectionrateis0-85m3/D,productionfactoris1A.Theresearchcontentsinthisp

8、aperareimportantgui