白音查干凹陷稠油特征及其成因

CharacteristicsandGenesisofViscousCrudeOilinBaiyinchaganSag常俊合　张同周　许书堂　黄元湖,457001.:,1962,通过对白音查干凹陷稠油物性及地化特征研究,认为该凹陷稠油宏观上具有高密度、高粘度、高凝固点、低饱和烃含量,饱和烃与芳烃比值小的特征;微观上烷烃色谱及生物标志物特征提供了稠油为两期混合油,成熟度属低～较成熟油的信息.利用同位素技术恢复了达-6井稠油密度,并根据生物标志物及物性特征将该凹陷稠油划分为三级降解油,结合油气藏分布规律及地化特征认为生物降解是造成该凹陷原油稠变的主要原因.　白音查干凹陷,稠油,生物降解,生物标志物,地球化学特征TE112.1111,,3200km2,(1),(K1ba2,K1bt,K1bd)..,,.121.,,0.9260.966g/cm3185.01862.7mPa.s,24.+,/.50%,78%,+45.34%.(,),2119987134(J.ofXianPetr.Inst.Jul.1998Vol.13No.4),.2000mPa.s2000mPa.s,[1].1/m/gcm-3/mPa.s//%/%(+)/%/-2738.6-764.4K1bt0.84097.11585.027.447.547.79-4579-596K1bt0.82294.778.5010.0711.427.80-3233-241.5K1bd10.96611862.72448.9116.2434.052.97-5505.5K1bt//40.1914.4745.342.78523.,,(2).:0.925g/cm3;0.9250.960g/cm3;0.960.98g/cm3,,,25-.,.VolkMan(1988).-30.966g/cm3,,()..-6,,0.926g/cm3(0.960g/cm3),.-6(243.0m)(2)(CPI=1.536OEP=1.696),-6,,.4.C29.(C19-C26)(C24),.,30,C2920S20S+20R0.270.38,,[2].-3,0.46,0.60,,.-6,,.,22(JXAPI)1998[3].,-6()-6.-6(,,).,22%.-60.960g/cm3(D=0.81g/cm3,-6()d=0.926g/cm3).,(2),:2/mC30C30C3222S22S+22RC2920S20S+20RC27/%C28/%C29/%-2738.6764.4K1bt0.150.380.560.42312346(1)-4579596K1bt0.130.510.590.45282448(1)-3233241.5K1bd10.210.320.600.46292645(2)-6239.4K1bd10.170.450.580.47232552(3)323:(1)(-2):(0.85g/cm310mPa.s).(2)(-3):,,(0.966g/cm31862mPa.s).(3)(-5-6):(85%),,,(0.960g/cm3,).[4],5141720RC27,5141720RC27,5141720RC27,.-620RC27-3,20RC29,-6-3.55.1,,,(6001000),.(-3233241.5m,-6239.4m),,,,.,,,,.5.2,..,.,[5].-3-6,,,,.5.3,,.,,-3-6.,,,-2-4,,-3-6.6,.,.,,.1..,1997,19(2)2..,1995,2(4)3,..:,19864..,1989,115,..:,19851997-12-12　　马　丽24(JXAPI)1998trolledbythestructureandsedimentaryfacies.Subjectheadings:LiaoheOilField,sedimentaryfacies,sedimentarysequence,depositionalmodel,oilandgasdistributionYuShenetal(LiaohePetroleumExplorationBureau,Panjin,Liaoning110200China)1998V.13N.4p.1417EvaluationofHydrocarbon-generatingPotentialofJurassicCoalinYiliBasinAbstract:Byorganicpetrologicalandgeochemicalmethods,theauthorsdiscussthecharacteristicsoftheorganicmaceralsandthehydrocarbongeneratingpotentialofJurassiccoalinYiliBasin.ItisshownthatthemiddleandlowerJurassiccoalinBadaowanformationisdifferentfromthatinXishanyaoforma-tioninorganicpetrologicalandgeochemicalcharacteristics.ThecontentsofvitriniteandexiniteinBadaowancoalaremorethanthoseinXishanyaocoal,andtheorganicgeochemicalindexesoftheformerarebetterthanthoseofthelatterwhichreflecthydrocarbongeneratingpotential.ComparedwithXis-hanyaoformation,thecoalinBadaowanformationisbettercoal-formedhydrocarbonsourcerock.ButitisdifficulttoformalargehydrocarbonaccumulationinYiliBasinbecauseoflowermaturityofhydrocarbonsourcerockandhighercontentofsandstoneinthestrata.Subjectheadings:YiliBasin,Jurassicsystem,organicgeochemistry,organicpetrology,coalrockhy-drocarbongeneratingZhangTongzhouetal(ResearchInstituteofExplorationandDevelopment,ZhongyuanPetroleumEx-plorationBureau,Puyang,Henan457001China)1998V.13N.4p.1820CharacteristicsandGenesisofViscousCrudeOilinBaiyinchaganSagAbstract:TheacroscopicfeatureoftheviscouscrudeoilinBaiyinchaganSagishigherdensity,viscosi-tyandcondensationpoint,lowersaturationhydrocarboncontent,andlessratiovalueofsaturationhydro-carbontoarocomatichydrocarbon.Itisknownthattheoilisamixtureoftheoilsformedintwostages,anditsmaturityislowertomatureraccordingtoparaffinechromatogramandbiologicalmarkers.ThedensityoftheviscouscrudeoilinthewellofDa-6isregainedbytheuseofstableisotopetechnique.Accordingtothecharacteristicsofbiologicalmarkers,thephysicalpropertyofviscouscrudeoil,andthedistributionofreservoirs,thecrudeoilisdividedintothreegradesofdegradedoil,anditisheldthatthedegradationofor-ganismcausesthecrudeoilthinkening.Subjectheadings:BaiyinchaganSag,viscouscrudeoil,biodegradation,biologicalmarker,geochemicalfeatureChangJunheetal(ResearchInstituteofExplorationandDevelopment,ZhongyuanPetroleumExplo-rationBureau,Puyang,Henan457001China)1998V.13N.4p.2124ModesandControllingFactorsofJurassicReservoirsinNorthwestChinaAbstract:TheJurassichydrocarbon-bearingbasinsinNorthwestChinaconsistoffluvial-lacustrinede-posits.Differenttypesofreservoirbedsdistributelaterallyincircleformsandoverlapvertically.Differentbasinshavedifferentreservoirformationmodes.Accordingtotherelationsbetweenhydrocarbonsourcerockandreservoir,theformationmodesofthereservoirscanbedividedthreetypes,andtheycanfurtherbedividedintofivetypesfromverticalrelationsbetweenhydrocarbonsourcerockandreservoirrock.Thecon-trollingfactorsoftheseJurassicreservoirsareanalysedinsixaspectsofthedistributionofhydrocarbonsourcerock,hydrodynamicforce,regionaloverlyingformations,theformingtimesoftraps,faultsandlithology.Subjectheadings:Jurassicsystem,basin,oilandgasreservoir,reservoirrock,hydrocarbonsourcerockZhangHongetal(NorthChinaPetroleumWorkersCollege,Renqiu,Hebei065506China)1998V.13N.4p.2527,30DiscussionontheCharacteristicsofOrganicMaceralsandtheHydrocarbon-generatingPotentialoftheSourceRockinMBasinAbstract:ThehydrocarbonsourcerockinMBasinmainlydistributesinlowerCretaceousAbuGabraformation.Theoilsourcerockismainlydark-greyshales.Thecrudeoilintheb