泸州古隆起嘉陵江组一段滩相薄储层分布规律

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Distribution of the Thin Reservoir of Shoal Facies at the Top of Member 1 of the Jialingjiang Formation in Luzhou Palaeohigh

TANGHao1*，LIAO Zichao1，SUNHaofei²，XUChang²，CHENXiao²

1.SchoolofGeoscienceand Technology，SouthwestPetroleum University，Chengdu，Sichuan61O5oo，China orationandDevelopmentesearchIstitute，outhwestOil&GasFeldompanyetroCina，Chngduiuana

Abstract：The first Memberandsecond MemberoftheLowerTriassic JialingjiangFormation inLuzhou Paleoupliftare the mainoilresouresinichuanBasin，however，thereservoirespeciallythethinsalreservoirdistributionisotlearyetwich restrictsoilexplorationprocessBasedoncore，cutingsandwelloggingdata，thispaperresearchesreservoirchaacteristics， reservoirgenesis mechanismandpaleogeomorphologyandgetthefollowingresults.Thereservoirlithology is mainlycomposedof thin-middleooliticand bioclastic limestone，andthemainreservoir space is thedisolved intragranularporesand moldicpores.Thephysicalpropertiesaregenerallypoor，buthighporosityand permeabilitylayersaredevelopedlocallyThe leaching ofmeteoric wateris themainreservoirgenesis mechanism，whilepaleoupliftis thekeytoformreservoirbydepositing grainshoalsandsyngenetickarstification.Thewelloggingstatisticsshowthatthethickness of granulatedrockinthefirst MemberofJialingjiangFormation ispositivelycorrelatedwiththethicknessofstrata，whichindicatesthatthethicknessof stratareflectstelevelofsdimentarypalaeotopographyThereforeitisconsideredtatthecentralofLuzhoupalaeouplift，the eastern marginofKangdianpalaeocontinentalandthesouthernareaoftecentralSichuanpalaeoupliftarethre mainfavorable areas forreservoirdevelopment.Thisresearch can beusedasreference for the explorationanddevelopmentofJialingjiang Formation inSichuanBasin，and more important itcanalsoprovideacasestudyforthedistributionofthinshoalreservoirin the world.

Keywords：carbonates; shoal facies reservoir; JialingjiangFormation;Luzhou Paleouplift;Sichuan Basin 网络出版地址：http：//link.cnki.net/urlid/51.1718.TE.20240913.1553.004

引言

大型古隆起是指沉积盆地中形成于地质历史时期的、体积巨大的正向地貌单元[1]，当其被海水覆盖时容易形成广阔的沉积地貌高地，从而连片发育碳酸盐岩礁、滩相沉积，是海相碳酸盐岩储层勘探的重要对象[2-5]。（剩余19586字）