蒙古塔木察格盆地塔南凹陷南屯组高频层序内的沉积演化特征
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摘要
为精确揭示高精度层序内沉积体系的三维几何形态及沉积演化特征,采用小波能谱分析手段,建立准层序组的三种叠加模式,以小波能谱的准层序叠加样式、振幅谱尺度突变点以及能谱聚类规律划分高频等时层序;结合地震反演、属性分析等手段,应用地层切片技术,对塔南凹陷南屯组SQ21时期进行沉积发育史研究。结果表明,研究区发育扇三角洲及水下扇沉积,随着沉积物供给能量的减弱,沉积体系表现为一种沉积规模由老到新逐渐向后(逆物源方向)萎缩、沉积物粒度逐渐变细的时空配置关系,到最大湖泛时期湖相全区发育,扇三角洲和水下扇沉积规模萎缩至全区最小,水下扇是扇三角洲前缘砂体二次搬运后再次滑塌而成。
To reveal the 3D geometry of depositional system and characteristics of sedimentary evolution in high-resolution sequence,we adopted the method of wavelet energy-spectrum analysis,builded up three stacking model of subsequence sets,and divided high-frequency and isochronal sequence by stacking model of wavelet energy-spectrum,change of amplitude spectrum and energy-spectrum's clustering regularity.Combined with the methods of seismic inversion and attributes analysis,we studied the sedimentary evolvement of SQ21 stage in the Nantun Formation of Tanan Sag,applying the technique of statal slice.The results showed that the deltaic fan and subaqueous fan were developed in the studied area,and depositional system represented the time-space model that depositional scale gradually rearward fade from older to younger and depositional size gradually attenuated with the slacking of sediment energy.Lacustrine facies developed in all area during the period of maximum flood.The scale of deltaic fan and subaqueous fan faded minimal in all area,and subaqueous fan was formed by the secondary transported and slumped of sediment of deltaic fan.
To reveal the 3D geometry of depositional system and characteristics of sedimentary evolution in high-resolution sequence,we adopted the method of wavelet energy-spectrum analysis,builded up three stacking model of subsequence sets,and divided high-frequency and isochronal sequence by stacking model of wavelet energy-spectrum,change of amplitude spectrum and energy-spectrum's clustering regularity.Combined with the methods of seismic inversion and attributes analysis,we studied the sedimentary evolvement of SQ21 stage in the Nantun Formation of Tanan Sag,applying the technique of statal slice.The results showed that the deltaic fan and subaqueous fan were developed in the studied area,and depositional system represented the time-space model that depositional scale gradually rearward fade from older to younger and depositional size gradually attenuated with the slacking of sediment energy.Lacustrine facies developed in all area during the period of maximum flood.The scale of deltaic fan and subaqueous fan faded minimal in all area,and subaqueous fan was formed by the secondary transported and slumped of sediment of deltaic fan.
引文
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[20]刘传虎,刘福贵,李卫忠.时频分析方法及在储层预测中的应用[J].石油地球物理勘探,1996,31(增刊1):11-20.LIU Chuan-hu,LIU Fu-gui,LI Wei-zhong,et al.Ap-plication of time-frequency analysis in reservoir predic-tion[J].Oil Geophysical Prospecting,1996,31(Sup-pl.1):11-20.
[2]Posamentier H W,Kolla V.Seismic geomorphology andstratigraphy of depositional elements in deep-water set-tings[J].Journal of Sedimentary Research,2003,73(3):367-388.
[3]Zeng H L,Bachus M M,Barrow K T,et al.Stratalslicing(Part I):realistic 3D seismic model[J].Geo-physics,1998,63(2):502-513.
[4]Zeng H L,Henry S C,Riola J P,et al.Stratal slicing(Part II):real 3D seismic data[J].Geophysics,1998,63(2):514-522.
[5]Gao D L.Volume texture extraction for 3D seismic visu-alization and interpretation[J].Geophysics,2003,68(4):1294-1302.
[6]Gao D L.Application of three-dimensional seismic tex-ture analysis with special reference to deep-marine faciesdiscrimination and interpretation:offshore Angola,WestAfrica[J].AAPG Bulletin,2007,91(12):1665-1683.
[7]Sarkar S,Marfurt K J,Slatt R M.Generation of sea-levelcurves from depositional pattern as seen through seismicattributes-seismic geomorphology analysis of an MTC-richshallow sediment column,northern gulf of Mexico[J].The Leading Edge,2010,29(9):1084-1091.
[8]Contreras A J,Latimer R B.Acoustic impedance as a se-quence stratigraphic tool in structurally complex deepwa-ter settings[J].The Leading Edge,2010,29(9):1072-1082.
[9]Zeng H L.Stratal slicing:benefits and challeges[J].The Leading Edge,2010,29(9):1041-1047.
[10]De Groot P,De Bruin G,Hemstra N.How to create anduse 3D wheeler transformed seismic volumes[J].SEGExpanded Abstracts,2006,25:1038-1042.
[11]De Groot P,Huck A,De Bruin G,et al.The horizoncube:a step change in seismic interpretation[J].TheLeading Edge,2010,29(9):1048-1055.
[12]Stark T J.Relative geologic time(age)volumes-relatingevery seismic sample to a geologically reasonable horizon[J].The Leading Edge,2004,23(9):928-932.
[13]刘招君,张迪,贾建亮,等.蒙古国塔南凹陷南屯组水下扇的沉积演化特征[J].吉林大学学报:地球科学版,2012,42(增刊1):1-7.LIU Zhao-jun,ZHANG Di,JIA Jian-liang,et al.Char-acteristics of sedimentary evolvement of subaqueous fanin Nantun Formation of Ta'nan depression from Mongolia[J].Journal of Jilin University:Earth Science Edition,2012,42(Suppl.1):1-7.
[14]姚树青,刘招君,陈永成,等.蒙古国塔南凹陷下白垩统铜钵庙组地震反射特征[J].世界地质,2011,30(4):641-647.YAO Shu-qing,LIU Zhao-jun,CHEN Yong-cheng,etal.Seismic reflection characteristics of Lower CretaceousTongbomiao Formation in Tanan Sag,Mongolia[J].Global Geology,2011,30(4):641-647.
[15]贾建亮,刘招君,陈永成,等.测井-地震多属性分层重构特征曲线技术[J].石油地球物理勘探,2010,45(3):436-442.JIA Jian-liang,LIU Zhao-jun,CHEN Yong-cheng,etal.Log-seismic multi-attributes stratified reconstructcharacteristic curves technique[J].Oil GeophysicalProspecting,2010,45(3):436-442.
[16]贾建亮,刘招君,陈永成,等.测井--地震多属性密度曲线重构反演技术及应用[J].吉林大学学报:地球科学版,2010,40(3):699-706.JIA Jian-liang,LIU Zhao-jun,CHEN Yong-cheng,etal.The method of log-seismic multi-attributes densitycurves reconstruct inversion and its application[J].Journal of Jilin University:Earth Science Edition,2010,40(3):699-706.
[17]贾建亮,刘招君,陈永成,等.测井约束地震岩性预测方法及应用—以汤原断陷达连河组SD2段为例[J].世界地质,2009,28(3):339-344.JIA Jian-liang,LIU Zhao-jun,CHEN Yong-cheng,etal.Lithologic prediction and application of log constrain-ed seismic--an example from SD2 segment of DalianheFormation in Tangyuan fault depression[J].Global Ge-ology,2009,28(3):339-344.
[18]刘葵,刘招君,朱建伟,等.时频分析在石油地球物理勘探中的应用[J].世界地质,2000,19(3):282-285.LIU Kui,LIU Zhao-jun,ZHU Jian-wei,et al.Applica-tion of time-frequency analysis in geology[J].GlobalGeology,2000,19(3):282-285.
[19]王志坤,钟建华,艾合买提江.阿布都热合曼,等.基于小波振幅谱和复小波相位谱的高分辨率层序划分[J].石油学报,2008,29(6):865-869.WANG Zhi-kun,ZHONG Jian-hua,Ahmatjan Abdurah-man,et al.Division of high-resolution sequence basedon wavelet amplitude spectrum and complex waveletphase spectrum[J].Acta Petrolei Sinica,2008,29(6):865-869.
[20]刘传虎,刘福贵,李卫忠.时频分析方法及在储层预测中的应用[J].石油地球物理勘探,1996,31(增刊1):11-20.LIU Chuan-hu,LIU Fu-gui,LI Wei-zhong,et al.Ap-plication of time-frequency analysis in reservoir predic-tion[J].Oil Geophysical Prospecting,1996,31(Sup-pl.1):11-20.
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