Discussion on "sandwich"structures and preservation conditions of shale gas in the South Yellow Sea Basin-中国期刊网

摘要 InordertomakeabreakthroughinMesozoic-PaleozoicshalegasexplorationintheSouthYellowSeaBasin,acomparisonofthepreservationconditionswasmadewithintheBarnettshalegasreservoirsintheFortworthBasin,theJiaoshibashalegasreservoirsinSichuanBasinandpotentialshalegasreservoirsinGuizhouProvince.Theresultsshowthatthe"Sandwich"structureisofgreatimportanceforshalegasaccumulation.Thereinto,the"Sandwich"structureisakindofspecialreservoir-caprockassemblagewhichconsistoflimestoneordolomiteonthetop,mudstoneorshalelayerinthemiddleandlimestoneordolomiteatthebottom.InconsiderationoftheMesozoic-PaleozoieintheLowerYangtze,andLaoshanUpliftwithweakPaleozoicdeformationandthrustfaultsealingOnbothflanksoftheLaoshanUplift,aconclusioncanbedrawnthatthepreservationconditionsofshalegasprobablydeveloped"Sandwich"structuresintheLowerCambrianandPermian,whicharekeylayersforthebreakthroughofshalegasintheSouthYellowSea.Moreover,thepreferredtargetsforshalegasdrillingprobablylocateatbothflanksoftheLaoshanUplift.

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Discussion on "sandwich"structures and preservation conditions of shale gas in the South Yellow Sea Basin

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Discussion on "sandwich"structures and preservation conditions of shale gas in the South Yellow Sea Basin

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