非均质出砂水平井产液剖面演化及热点形成机制试验

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中图分类号：TE358 文献标志码：A

Abstract：Inthisstudy，simulationexperimentswereconductedtostudytheevolutionoffluid inflowprofilesandtheformationmechanismofhotspots innon-homogeneoussandproductiohorizontalwellsusingalarge-scalehorizontalwell testingequipment.Threenon-homogeneous reservoirrock models wereconstructed byanartificiallycementing method.Theexperimentalresultsshowthatfluidandsandproductioncanexhibitasynergisticeffect，withthediferenceofsand-outintensity betweenstronglyandweaklyconsolidatedreservoirregions increasingwith thefluidproduction.Eventuall，thesandproductionprofiledistributionisiversetotheinitialcompresivestrengthdistribution，resemblingtheinitialrockporosityandper meabilitydistribution.Undertheinfluenceofthesand-fluidsynergsticproductionmechanism，localhighrateinflowhotspots may emerge after long production periods.The experiments reveal that a hotspot area can contribute over 80% of the total fluid production.Duetotheformationofhigh-rateinflowhotspots，theinflowcoeficientinlowconsolidationstrength/highporosity/highpermeabilityregionscanincreasefromaninitialrangeofO.2-O.4tooverO.8.Meanwhile，thepermeabilitydistributionofthereservorcanshiftfromaninitialgradualvariationalongthehorizontalwelltoaighlyheterogeneousdistribution，with thevalues ofpermeability increasingbyup to17.5 times.

Keywords：non-homogeneousreservoir；losesandstonereservoir;horizontal wellsandproduction；inflowhotspot；sand-fluid production profile；synergistic effect

疏松砂岩储层是中国油气增储稳产的关键领域，水平井技术是其高效开发的核心手段。（剩余13122字）