高密度页理页岩油藏多相排采数学模型及动态反演

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中图分类号：TE34 文献标志码：A

Abstract：Toacurately studythemultiphaseproductiondynamicsinshalereservoirs with highlydevelopedbeddings，atriphase（oil-gas-water）productionflow mathematical modelconsideringthe interactionbetweenopened beddingsandshale matrix wasfirstlyestablished.Adynamicdrainagearea（DDA）conceptwasintroducedtosolvethemodel，andthedynamic changes of thelengthandapertureofopenedbeddingswereaccounted.Basedonthemodel，aproductiondynamic interpretation method wasdeveloped incombination with thestraight-lineanalysis（SLA）andautomatic history matching（AHM） methods.Inacase study，thekeyflowparametersofaproducingwellinatypicalshaleoilblock were interpretedusing the newmethod presentedinthispaper，andthewellsproductioncapacitywaspredicted.Theresultsindicatethat theclosureof openedbeddings inthelengthdirectionmainlyafects thesizeofthematrixcontroledbytheopenedbeddingsandhasasignificantimpacton thepeak productionand gasproductionrate.Meanwhile，theclosurein theaperturedirectionofopened beddingsaffects thepeak productionanddeclinerateof theoil-gasphases.Thebothclosuremechanismsmustbeconsidered simultaneously in order to more realisticall simulate the post-fracturing production process of shale oil.

Keywords;shalereservoir；mult-phaseflowback；mathematical model；automatic history matching；parameterinterpretation

纯页岩型页岩储层中，人工裂缝在竖直方向极易沿层理缝转向[1]，同时压后流体的二次赋存及裂缝的动态演变导致了页岩油返排动态的复杂、解释难度大。（剩余12548字）