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1、中國石油大學(xué)(華東)碩士學(xué)位論文注水開發(fā)儲層物性參數(shù)變化數(shù)值模擬研究姓名:趙壽元申請學(xué)位級別:碩士專業(yè):油氣田開發(fā)工程指導(dǎo)教師:姜瑞忠20090601摘要老油罔高含水期取心資料和礦場測井動態(tài)資料表明,儲層滲透率、原油粘度和巖石潤濕性等物性參數(shù)隨注水開發(fā)發(fā)生連續(xù)變化?,F(xiàn)有的油減數(shù)值模擬軟件沒有考慮這些參數(shù)的動態(tài)變化,這與油田開發(fā)實際不符,導(dǎo)致預(yù)測的結(jié)果和礦場實際結(jié)果存在一定偏差。因此,系統(tǒng)全面地研究開發(fā)因素引起儲層物性參數(shù)的變化規(guī)律,建立符合地下實際情況的動態(tài)地質(zhì)模型進(jìn)行精細(xì)油藏數(shù)值模擬,準(zhǔn)確預(yù)測高含水期剩余油的分布規(guī)律,在當(dāng)前油氣資源R益緊張的形
2、勢下對指導(dǎo)油田的進(jìn)一步挖潛、提高采收率具有重要意義。本文在全面總結(jié)儲層物性參數(shù)變化原因的基礎(chǔ)上,重點分析了注入水動力作用對儲層物性參數(shù)變化的影響,基于儲層物性參數(shù)變化與注入水沖刷孔隙體積倍數(shù)之間關(guān)系建立了考慮滲透率、原油粘度及潤濕性連續(xù)變化的時變描述模型,并將其引入常規(guī)三維三相黑油模型中,建立參數(shù)時變數(shù)學(xué)模型。利用有限差分方法將該數(shù)學(xué)模型離散化得到數(shù)值模型,應(yīng)用IMPES方法進(jìn)行求解,在此基礎(chǔ)上應(yīng)用FORTRAN90和VisualC++兩種計算機(jī)語言開發(fā)了參數(shù)時變數(shù)值模擬軟件,彌補(bǔ)了目前商業(yè)油藏數(shù)值模擬器的不足,提高了油藏數(shù)值模擬的精度。應(yīng)用研制
3、的可考慮儲層參數(shù)連續(xù)變化的參數(shù)時變數(shù)值模擬軟件,對參數(shù)時變概念模型和參數(shù)不變概念模型進(jìn)行數(shù)值模擬研究,將模擬結(jié)果進(jìn)行對比,分析儲層各參數(shù)動態(tài)變化對開發(fā)效果的影響。研究結(jié)果表明:儲層物性參數(shù)的變化對水驅(qū)開發(fā)效果影響顯著;儲層滲透率增大及原油粘度增大均導(dǎo)致水驅(qū)開發(fā)效果變差:潤濕性的變化使得水驅(qū)開發(fā)效果變好。關(guān)鍵詞:注水開發(fā),參數(shù)變化,滲透率,原油粘度,潤濕性,注入水沖刷倍數(shù)ResearchofNumericalSimulationontheChangeofReservoirParametersduringFloodDevelopmentZHAOSho
4、uyuan(Oil&GasFieldDevelopmentEngineering)DirectedbyProfessorJIANGRuizhongAbstractBotholdoilfieldcoringdatainhighwatercutstageandminesdynamicloggingdatashowthatreservoirpermeability,crudeoilviscosityandrockwettabilityhavechangedgreatlyafterlong-termflooddevelopmentcomparedwith
5、theearly.Butthechangeoftheseparametersisnotconsideredinexistingreservoirnumericalsimulationsoftware.It’Sinnconsistentwiththeactualoilfielddevelopmentandwillcausepredictionresultsofpooraccuracywhichhavebigdeviationtoactualresults.Therefore,ithasvitalsignificancetoclearthedistr
6、ibutionofremainingoilinhighwatercutstagetoguidefurtheroilfielddevelopmentandenhanceoilrecoveryintheincreasinglytensesituationofoilandgasresourcescullently,whichbasesonestablishmentdynamicgeologicalmodelconformingtotheactualsituationoftheundergroundforfinereservoirnumericalsim
7、ulationaftersystematicandcomprehensiveresearchonreservoirparameterschangerulesduetodevelopmentfactors.Theeffectofinjectionwaterpowerfunctiononparameterschangehasbeenfocusedoninthispaper.Afterthat,parameterstime—varyingdescriptionmodelsareestablishedonthebasisoftherelationship
8、betweenreservoirparameterschangeandfloodwaterporevolumemultipleandin