简介：Thispaper,basedonthefundamentalinorganicchemicalandorganicgeochemicalcharacteristicsofoilfieldwatersfromtheTurpanDepression,presentsthecontentsoforganicmatter,thedistributionoflow-carbonfattyacidsandthecontentsofaromatichydrocarbonsaswellastheirprincipalultravioletabsorptionspectralandfluorescencespectralcharacteristicsinoilfieldwatersfromdifferentoil/gas-bearingareas.Theoil/gasreservoirsinthisdepressionareclassifiedintermsoftheirconservingconditions.Inadditon,thepaperalsodiscussesthechemicalcharacteristicsofoilfieldwatersfromdifferenttypesofoil/gasreservoirswithanemphasisonthecharacteristicsoftheirlocalizationintheγNa/γCa-γNa/γClcorrectiondiagram.OnthisbasisitisattemptedtoexpoundthefundamentalgeochemicalcharacteristicsofoilfieldwatersfromtheTurpanDepressionandtheirgeologicalsignificance.

简介：Organicmatterwasexperimentallyextractedbysupercriticalfluids(CO2+1%isopropanol)frompetroleumsourcerocksofdifferentthermo-maturitiesatdifferentburieddepthsinthesamestratigraphicunitintheDongyingBasin.Theresultsshowthatsupercriticalfluidextraction(SFE)ismoreeffectivethanSoxhletextraction(SE),withhigheramountsandgreatervarietiesofhydrocarbonsandsolubleorganicmatterbecomingextractive.ThesupercriticalCO2extractionisthereforeconsideredmorevaluableinevaluationofpetroleumsourcerocksandoilresources,particularlythoseofimmaturetypes.