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1、TheSimulationExperimentofSecondaryPorosityFormingMechanismaboutTuffaceousSandstoneHeader，TimesNewRoman，10-PointType，CenteredTitle，TimesNewRoman，14-PointType，Centered,inBold中TheSimulationExperimentofSecondaryPorosityFormingMechanismaboutTuffaceousSandstoneLiuPeipei,North
2、eastPetroleumUniversity;Authorinformation，TimesNewRoman，10-PointType，CenteredZhangYunfeng,SPE,NortheastPetroleumUniversityAbstract，TimesNewRoman，10-PointType，1.25-spaced,JustifyAlignAbstract:Thepapertakesthesimulationexperimentontheformationmechanismofsecondaryporesthro
3、ughdissolutingthecastingthinsectionsofrockdirectly.ThesamplesaretakenfromthecoreofthetuffaceoussandstoneinNantun-ⅠinBeierDepressionofHailarBasin,andtheyaredissolutedintheconditionsof80℃,normalpressureandaceticacidofwhichthepHvalueis6.00.Minerals’dissolutionsequenceiscon
4、cludedbyanalyzingexperimentresults,andtheformationmechanismofsecondaryporesissummarizedontheaspectsofthewaymineralscorrodesandtheself-factorsthatinfluencethevelocityofminerals’dissolutionandsoon.Body,TimesNewRoman,10-PointType,firstlineindented0.2in.,1.25-spaced,Justify
5、AlignKeyword:Tuffaceoussandstone;castingslice;dissolution,secondaryporosity;simulationexperimentMargin:a.Top:2.54cmb.Left:3.18cmc.Right:3.18cmd.Bottom:2.54cmThetuffaceoussandstoneisthesandsofspecialtypethatmainlycontainsterrigenousdetritalsedimentandisrichinpyroclastics
6、(thediameterislessthan2mm,andmassfractionliesbetween5%~50%)anddetritalgrainsofrock,interstitialmaterials(WANGHong-yu,etal.,2011).Thetuffaceoussandstonedistributesextensivelyinmostdepositionalbasinsathome(ZOUCai-neng,etal.,2008),andhasgreatexplorationpotential.Butthatthi
7、stypeofreservoirismainlyoflowporosityandlowpermeabilityincreasesthedifficultyofthedevelopmentofoilandgas.Sotakingexperimentsondissolutionoforganicacidofthetuffaceoussandstoneandstudyingtheformationmechanismofsecondaryporesdeeplyhavetheimportantguidingsignificanceforpred
8、ictingsecondaryporosity.Atpresenttheresearchesoftherockdissolutionaremostlylimitedtosmallmechanicalgrindingpar
