基于疊前反演技術的須家河組孔隙甜點儲層預測

打開文本圖片集

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)絡出版地址：http：//link.cnki.net/urlid/51.1718.TE.20241126.1404.002

引言

隨著油氣勘探開發(fā)研究的深入推進，逐步由發(fā)現(xiàn)構造油氣藏向巖性油氣藏轉(zhuǎn)變，對地震勘探技術要求越來越高，由于疊后地震技術無法解決日益復雜多變的巖性預測問題，疊前地震理論及其預測技術的重要作用越發(fā)明顯。（剩余26336字）