垂直上升管中油气水三相流流型多尺度熵分析.docx

垂直上升管中油气水三相流流型多尺度熵分析
摘要：
在石油勘探和生产过程中，垂直上升管中的油气水三相流问题一直是一个重要的研究方向。本文运用多尺度熵分析方法，研究了垂直上升管中油气水三相流的流型分布规律。通过对实验数据的分析和处理，得出了不同流型下的多尺度熵值，分析了熵值与流型的关系。实验结果表明，在不同的流型下，多尺度熵值具有明显的差异，从而可以有效的判别油气水三相流的流型，为垂直上升管中的油气水三相流研究提供了一定的理论基础。
关键词：多尺度熵分析；垂直上升管；油气水三相流；流型分布
Introduction
Verticalriserisoneoftheimportantequipmentinoilexplorationandproductionprocess.Thestudyofthree-phaseflowofoil,gasandwaterinverticalriserisofgreatsignificancetothesafeandefficientproductionofoilfield.However,thethree-phaseflowinverticalriserisaverycomplexnonlinearsystem,whichisdifficulttodescribebytraditionalmethods.Inrecentyears,multi-scaleentropyanalysismethodhasbeenproposed,whichcaneffectivelyanalyzethenonlineardynamicalcharacteristicsofcomplexsystemsandprovidenewideasforstudyingthethree-phaseflowinverticalriser.
Methodology
Multi-scaleentropyanalysisisamethodofanalyzingthenonlinearcharacteristicsoftimeseries.Itisbasedontheconceptofentropy,andcalculatestheentropyvalueoftimeseriesatdifferenttimescalesbydividingthetimeseriesintodifferentsegments.Inthisstudy,threedifferentflowpatternsofoil,gasandwaterinverticalriserwereselected,andthecorrespondingexperimentaldatawerecollected.Multi-scaleentropyanalysiswasusedtoanalyzetheentropyvaluesofdifferentflowpatterns.
Results
Theexperimentalresultsshowthattheentropyvaluesofdifferentflowpatternsofoil,gasandwaterinverticalriseraresignificantlydifferent.Theentropyvalueofthebubblyflowpatternisthesmallest,indicatingthattheflowpatternisthemoststableandregular,andthechaoticflowpatternhasthelargestentropyvalue,indicatingthattheflowpatternisthemostcomplexandchaotic.Throughtheanalysisoftherelationshipbetweenentropyvalueandflowpattern,itisfoundthattheentropyvaluecaneffectivelydistinguishdifferentflowpatternsofoil,gasandwaterinverticalriser.
Conclusion
Inthispaper,multi-scaleentropyanalysiswasusedtostudytheflowpatterndistributionofthree-phaseflowofoil,gasandwaterinverticalriser.Theexperimentalresultsshowthattheentropyvaluesofdifferentflowpatternsaresignificantlydifferent,whichcaneffecti