搜索
:100020747(2007)0220142208(()):97301(2006CB202301):,,;,,222;,,;,,,8162:;;;;;:TE122.1:AStructureofunconformityanditscontrolonhydrocarbonaccumulationHEDeng2fa(SchoolofEnergyResources,ChinaUniversityofGeosciences,Beijing100083,China)Abstract:ThestructuralcharacteristicsofunconformitiesareanalyzedwiththeCretaceousbaseunconformityinJunggarBasinasanexample.Unconformitysurfacesarethecarrierbedsinmostcasesifsandstonesdeveloponthem.Ifweatheringclayzonesdevelop,theunconformitiesusuallyformtraps.Theunconformitysurface,thefault,andthecarrierbedconstituteanefficientmigrationnet.Infaultedbasins,hydrocarbonsmigrateandaccumulatenear2sourceintwoways,verticallymigratingalongthefaultandadjustingalongtheunconformityinasteepslope,andhorizontallymigratingalongtheunconformityandverticallyadjustingalongthefaultinashallowslope.Indepressionbasins,hydrocarbonsaccumulatefarfromthesource,poolsaredistributedstep2likeasaresultofthestep2likerisingofthemigrationpathwaynetcomposedoffaultsandunconformitysurfaces.Hydrocarbonsaccumulateoverthesourceinfold2and2thrustbeltsofforelandbasins,andthefaultsconnecttheaboveandbelowunconformitiesleadingtothehydrocarbonsbeingmigratedinazigzagstyle.Theunconformitystructurescontrolthehydrocarbonmigrationandaccumulation,andvarywithtime.Keywords:unconformity;structure;oilandgasmigrationpathway;trappingmechanism;oilandgaspool2formingmodel;oilandgasdistribution,(),[1,2][3,4],,(),[4],,[5,6]11.1[1],(nonconformity)(unconformity)(disconformity)(para2conformity),Vail(1977),6[7][8],,[9211][12],4:2222[9211],22224120074PETROLEUMEXPLORATIONANDDEVELOPMENTVol.34No.221.2[13,14]:,,()[13];,,[15217];,,,,,1.3,,:[5,6],[18226];(2)[10],,,,[1,2,27],,;,;,,,,,,[11,12,25,28230],22.13[11,12,23,25,28,30234]3(1),,,132.1.1(),,,[27],,,,,59,525m,,[9,33]2.1.2,,,,[28],[9,33,34],,,2.1.3[23],,,[31,35237],34120074:,,,,,,200300m,[38],;,(1)1JK10m[28],,,,,,[34]2.2[27,31][9,32,39][11,29],,[9,12,25,29,32,39],1[9,32,39](23)2.2.1,()()2;()(),()()(,)4,,4,232,(22,),,2[11],2,232.2.2,4,332,,441Vol.34No.22222,2.3,,6.67km2,[40][9,32,41,42],,108,13(18):1,(,)2(,)2(,),,;2,22;3,22(,);4,22;5,22;6,22;7,22;8,22;9,22;10,22;11,22;12,22;13,223,(,)()59,11,512(41)1,64(22),5928,,2;1(22,9)3(22,7)8(22,6)11(22,3);11,174m,6(22);1,14m,11(22)6,67.9m11.036.0m,10.617.4m,,(1),,1(m)(m)(m)(m)()12227.5104(67.4)550(24.9)1.533(16.2)1049.5(26.2)91881328178139222552020157213223086(65.4)1153.5(25.7)1855(39.7)2845112043474228020303080162215174(67.9)5121(29.7)131(10.6)565(27.6)646782121721230022111611221237913141123528722118595910182266120(97.0)2055(34.1)536(17.4)1885(45.3)843125692216059101711022481038271112214158(86.0)1248(29.7)2110(56.3)3113132271153620261:54120074:33.1,2[9,24,27,29,33,39,43,44](123)(),,,,[44]3.1.1,,,,,,1030m,[41],,,,,[9,33,39,44],()(,),3.1.2,[25]:,,,,,;,,,2,22,,,()2()()(),2[25],,,[45],,SiO2AlKNaCaMg,SiO2,Al3+Ca2+,,,,2,,[44],,[31],,,22,,222[38],[37],20Ma[46],,;,,,[37],3.23.2.1,,,,,(PowderRiver),[47],,3.2.1.1(35):641Vol.34No.259,,31(K1q),K1q,:,[48]2,,53.2.1.2(5),(J3q)(J2t),(J1+2)K1q,2,,,,,,J2K1[49251](),2,(),(),[5,6],3.2.2()(),,,(),,[26,52,53],,,33.2.2.1,(Es4Es2),,,,,2;,,Es3Es2Ng,,,2(6)[11,54]6([55]),,,,,,,74120074:3.2.2.2,,,,;,(K1q)(J2t),,,(7),[51]1[56],[9,39,41,42],,,[57],[9],7,,3.2.2.3[58],,8,,,(),,,,(wedge2top),,,[59],,,,2[56]8,,[60],4,,111t,23100m3,[61],,,[11,54][55][62],,,();[55,62]:[1]DunbarCO,RodgersJ.Principlesofstratigraphy[M].NewYork:JohnWiley&Sons,1957.12356.[2],,.[J].,2004,18(3):2692275.[3],,.[J].,2000,24():52256.[4],,,.[J].,2004,11(2):3532360.[5].[J].,1983,4(4):1210.[6],,,.[M].:841Vol.34No.2,1986.[7]VailPR,MitchumRM,ThompsonIIIS.Seismicstratigraphyandglobalchangesofsealevel,part3:relativechangesofsealevelfromcoastalonlap[A].Seismicstratigraphyapplicationstohydrocarbonexploration[C].AAPGMemoir26,1977.63297.[8]BrownLFJr,FisherWL.AAPGContinuingEducationCourse,NoteSeries(16):Seismicstratigraphicinterpretationandpetroleumexploration[M].Tulsa:AAPG,1979.12181.[9],,,.[J].,2005,26(3):16220.[10],,,.[J].,2006,28(2):123.[11],.[J].,2006,30(2):1612167.[12],,,.[J].,2006,27(2):2392241.[13]SlossLL.TectonicevolutionofthecratoninPhanerozoictime[A].Sedimentarycover:NorthAmericanCraton[C].Boulder:GeologicalSocietyofAmerica,1988.25251.[14],,,.[M].:,1996.1221.[15],,,.[J].,1997,71(1):7216.[16],,.[J].(),1998,22(6):1192125.[17],,,.[J].,2000,19(1):54259.[18]HindleAD.Petroleummigrationpathwaysandchargeconcentra2tion:Athreedimensionalmodel[J].AAPGBull.,1997,81:145121481.[19]HindleAD.Petroleummigrationpathwaysandchargeconcentra2tion:Athreedimensionalmodel(Reply)[J].AAPGBull.,1999,83:102021023.[20]BekeleE,PersonM,MarsilyG.Petroleummigrationpathwaysandchargeconcentration:Athreedimensionalmodel(Discussion)[J].AAPGBull.,1999,83:101521019.[21],,.[J].,2000,21(2):1332135.[22],,,.[J].,2000,11(6):126.[23],,,.[J].,2001,25(1):124.[24],,.[J].,2001,22(1):24226.[25],,.[J].,2005,24(1):13216.[26],,,.[J].,2002,24(6):5272532.[27].[J].,1995,16(3):14221.[28],,.[J].,2005,12(4):4812488.[29].[J].,2005,12(2):26229.[30],,,.[J].,2006,30(3):3262330.[31],,.[J].,1996,23(5):16219.[32],,.[J].,2003,27(3):2702276.[33],