基于疊前反演技術(shù)的須家河組孔隙甜點(diǎn)儲(chǔ)層預(yù)測(cè)

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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網(wǎng)絡(luò)出版地址：http：//link.cnki.net/urlid/51.1718.TE.20241126.1404.002

引言

隨著油氣勘探開(kāi)發(fā)研究的深入推進(jìn)，逐步由發(fā)現(xiàn)構(gòu)造油氣藏向巖性油氣藏轉(zhuǎn)變，對(duì)地震勘探技術(shù)要求越來(lái)越高，由于疊后地震技術(shù)無(wú)法解決日益復(fù)雜多變的巖性預(yù)測(cè)問(wèn)題，疊前地震理論及其預(yù)測(cè)技術(shù)的重要作用越發(fā)明顯。（剩余26336字）