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《數(shù)值模擬方法驗(yàn)證光透法監(jiān)測(cè)流體飽和度的有效性以非均質(zhì)孔隙介質(zhì)中的水-氣兩相流為例》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、2016年9月,第22卷,第3期,572-579頁(yè)高校地質(zhì)學(xué)報(bào)Sep2016,Vol.22,No.3,pp.572-579GeologicalJournalofChinaUniversitiesDOI:10.16108/j.issn1006-7493.2016024數(shù)值模擬方法驗(yàn)證光透法監(jiān)測(cè)流體飽和度的有效性:以非均質(zhì)孔隙介質(zhì)中的水/氣兩相流為例莫龍庭,喬文靜,章艷紅,葉淑君*,吳吉春表生地球化學(xué)教育部重點(diǎn)實(shí)驗(yàn)室,南京大學(xué)地球科學(xué)與工程學(xué)院,南京210023摘要:光透法作為一種安全經(jīng)濟(jì)的非侵入監(jiān)測(cè)方法廣泛應(yīng)用于室內(nèi)砂箱
2、多相流實(shí)驗(yàn)中,但該方法在局部空間點(diǎn)上結(jié)果的可靠性尚缺乏驗(yàn)證。鑒于當(dāng)前難以采用實(shí)驗(yàn)手段直接進(jìn)行局部監(jiān)測(cè)點(diǎn)取樣驗(yàn)證光透法結(jié)果,本文以非均質(zhì)孔隙介質(zhì)中的水/氣兩相流為例,基于砂箱實(shí)驗(yàn)開展了數(shù)值模擬研究以進(jìn)行論證。研究表明:(1)模擬結(jié)果中氣體在非均質(zhì)含水層中的遷移規(guī)律、展布形態(tài)和飽和度分布總體上再現(xiàn)了光透法的測(cè)量結(jié)果。(2)數(shù)值模擬和光透法得到的6個(gè)局部點(diǎn)飽和度數(shù)據(jù)在各時(shí)刻均擬合較好。同時(shí)選取12個(gè)時(shí)刻共5316個(gè)監(jiān)測(cè)點(diǎn)的飽和度數(shù)據(jù)進(jìn)行分析,其決定系數(shù)達(dá)0.94,這表明模擬結(jié)果從統(tǒng)計(jì)角度較好地驗(yàn)證了光透法在局部點(diǎn)監(jiān)測(cè)上的有效
3、性,兩者間的差異主要由人工填砂導(dǎo)致的介質(zhì)“不均勻”引起。(3)氣體總量方面,實(shí)測(cè)排水值、模擬結(jié)果與光透法計(jì)算結(jié)果均擬合較好。因此數(shù)值模擬結(jié)果系統(tǒng)地驗(yàn)證了光透法監(jiān)測(cè)流體飽和度的有效性。關(guān)鍵詞:光透法;數(shù)值模擬;有效性驗(yàn)證;飽和度;水/氣兩相流;非均質(zhì)孔隙介質(zhì)中圖分類號(hào):Q915.819+.1文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1006-7493(2016)03-0572-08VerificationofEffectivenessofLightTransmissionStudyonFluidPhaseSaturationUsingNu
4、mericalModelingMethod:CasesofWater-gasFlowinHeterogeneousPorousMediaMOLongting,QIAOWenjing,ZHANGYanhong,YEShujun*,WUJichunKeyLaboratoryofSurficialGeochemistry,MinistryofEducation,SchoolofEarthSciencesandEngineering,NanjingUniversity,Nanjing210023,ChinaAbstract:L
5、ightTransmissionMethodhasbeenextensivelyusedinphasesaturationmeasurementsinporousmediaduetoitsnon-destructiveandnon-invasivefeature.Howeverdoubtaboutitseffectivenessstillexistsduetothelackoflocaldatavalidation.Giventhefactthatitisimpossibletoobtainlocaldataexper
6、imentally,numericalsimulationwasthendevelopedtoverifyitseffectiveness,inthecasesofwater-gasflowinheterogeneousporousmedia.Theresultsshowthat(1)simulationresultsagreewiththelighttransmissionresultsintermsofthegasdistributionpatternandgassaturationrangeinthehetero
7、geneousporousmedia;(2)sixlocalsaturationvaluesoflighttransmissionresultsintime-seriesgraphshowgoodconsistencywiththesimulationresultsateachmoments,meanwhiletheanalysisof5316localsaturationdatawithin12minutesshowsthedeterminationcoefficientreaches0.94betweenthesi
8、mulationresultsandthelighttransmissionresults.Theresultsvalidatetheeffectivenessoflighttransmissionmethodatlocalpoints,withthedifferencebeingcausedbythesandboxpacking