基于叠前反演技术的须家河组孔隙甜点储层预测

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Predictionof PoreSweetReservoirin Xujiahe Formation with Pre-stack Inversion Technique

SHIXiulin*，LIPing，LIJianbo，WANGChun，RENHaixia

Exploration&Production ResearchInstitute，SouthwestOil&Gas CompanyINOPEC，Chengdu，Sichuan 41，Chi

Abstract：Reservoirpredictionoftightsandstone isalwasadificultproblemintheindustryConventionalpost-stackimpedance canotdistinguishbetweendensesuroundingockandhighporositysandstoneefectivelyandsuchproblemisparticularly typicalinthestudyoftightsandstonereservoirpredictionofXujiaheFormationinDayiArea，westernSichuan.Tosolve such problems，thispapercariedoutresearchbypre-stack technologyThepetrophysicalanalysisshows thatthevelocityratioof P-waveandS-wavehasagooddistingushingeffectonporoussandstonereservoirs，whichindicates thatthepre-stacktechnique caneffectivelysolve the predictionproblem.The propertiesofP-waveimpedance，S-wave impedanceandthevelocityratio betweenP-waveandS-waveareobtainedbypre-stackinversion.Withthehelpoflithofaciesanalysistechnology，thesweet spotprobabilitybodyofporesandstonereservoir isgenerated，andtheplanedistributionofporereservoir ispredictedThe resultsshowthatthetechniqueisefectiveandconsistentwithrealdriling，whichisof geatsignificancetotheexploration anddevelopmentoftightsandstonefield.Thispaperalsoelaboratesthekeytechnicalinksofpre-stackprediction，whichincluded pre-stackoptimization，partalstacking，petrophysicalanalysis，probabilisticmodelbuilding，versioncalulationnd effectaalysisofreal drilingcomparison.Eachkeylink iscriticaltothereliabilityoftheresults.Thismethodprovides strong technicalsupportforthestudyoftightsandstonereservoirpredictionandhas important guiding significance forcontinental exploration in western Sichuan.

Keywords：tight sandstone;pore reservior;prestack inversion; vp/vs ；probabilitydensityfunctior网络出版地址：http：//link.cnki.net/urlid/51.1718.TE.20241126.1404.002

引言

随着油气勘探开发研究的深入推进，逐步由发现构造油气藏向岩性油气藏转变，对地震勘探技术要求越来越高，由于叠后地震技术无法解决日益复杂多变的岩性预测问题，叠前地震理论及其预测技术的重要作用越发明显。（剩余26336字）