陆相断陷盆地陡坡带砂砾岩体期次划分——以济阳坳陷车西洼陷北带中浅层为例
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摘要
针对车西洼陷北带中浅层砂砾岩体期次划分困难的问题,初步探索出一种在地质和地震资料约束下,基于测井曲线米氏旋回和小波变换技术的砂砾岩体描述方法。通过对测井曲线进行频谱分析,认为车西洼陷北带东营组砂砾岩体的沉积期次受米氏旋回的控制,偏心率404.0 ka和地轴倾角53.6 ka周期控制着四、五级层序的发育,是进行砂砾岩体期次划分与对比的基础。因此,依据米氏旋回和小波变换理论,在纵向上对车西洼陷北带东营组砂砾岩体进行了精细的划分,共识别出8~10个小的扇体期次。研究表明,应用米氏旋回和小波变换技术分析高频旋回,提高了沉积旋回研究的定量化水平。其中,设计的米氏旋回滤波曲线和选取的小波变换系数与高频旋回具有较好的对应关系,可有效地指导砂砾岩体期次的精细划分。
In order to solve the problem of sedimentary cycle recognition of the middle-shallow sandbodies in the northern Chexi Subsag,we proposed a geologic-and seismic-constrained sedimentary cycle description method by using the Milankovitch cycle theory and wavelet transformation with well logging,constrained.Spectrum analysis of well logs shows that sedimentary cycle of sandbodies in Dongying Formation in the northern Chexi Subsag was controlled by the Milankovitch cycle.The fourth-and fifth-order sequences were controlled by the cycle of 404.0 ka eccentricity and 53.6 ka dip of earth's axis,which is the foundation of the division and correlation of sandbody sedimentary cycle.According to the theories of Milankovitch cycle and wavelet transformation,we identified 8-10 small sedimentary fans vertically in the sandbodies of the Dongying Formation in the northern Chexi Subsag.The results show that analyses of high frequency cycles by using the Milankovitch cycle and wavelet transform can improve the quantificational level of sedimentary cycle division.The designed curves of Milankovitch cycle filters and the selected wavelet transformation coefficients correlate well with the high frequency cycles,and thus can be used to effectively recognize sedimentary cycles of sandbodies.
In order to solve the problem of sedimentary cycle recognition of the middle-shallow sandbodies in the northern Chexi Subsag,we proposed a geologic-and seismic-constrained sedimentary cycle description method by using the Milankovitch cycle theory and wavelet transformation with well logging,constrained.Spectrum analysis of well logs shows that sedimentary cycle of sandbodies in Dongying Formation in the northern Chexi Subsag was controlled by the Milankovitch cycle.The fourth-and fifth-order sequences were controlled by the cycle of 404.0 ka eccentricity and 53.6 ka dip of earth's axis,which is the foundation of the division and correlation of sandbody sedimentary cycle.According to the theories of Milankovitch cycle and wavelet transformation,we identified 8-10 small sedimentary fans vertically in the sandbodies of the Dongying Formation in the northern Chexi Subsag.The results show that analyses of high frequency cycles by using the Milankovitch cycle and wavelet transform can improve the quantificational level of sedimentary cycle division.The designed curves of Milankovitch cycle filters and the selected wavelet transformation coefficients correlate well with the high frequency cycles,and thus can be used to effectively recognize sedimentary cycles of sandbodies.
引文
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[8]张海峰,张林晔,姚益民,等.东营凹陷沙河街组四段滩坝砂米氏旋回层序划分与对比[J].地层学杂志,2008,32(3):279-280.Zhang Haifeng,Zhang Linye,Yao Yimin,et al.MilankovitchCycles and sequence division and correlation of the member 4of the Shahejie formation in the Dongying Depression,Shan-dong[J].Journal of Stratigraphy,2008,32(3):279-280.
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[10]张海峰.以米氏旋回为标尺进行高级别层序地层划分与对比——以准噶尔盆地中Ⅰ区块为例[J].油气地质与采收率,2006,13(4):18-20.Zhang Haifeng.Highresolution sequence stratigraphic classifica-tion and correlation by using Milankovitch Cycles as rulers-takingthe Zhong I block in Junggar Basin as an example[J].PetroleumGeology and Recovery Efficiency,2006,13(4):18-20.
[11]秦建中,王杰,邱楠生,等.反演南方海相层系热史动态演化的新温标——磷灰石、锆石(U-Th)/He年龄和封闭温度[J].石油与天然气地质,2010,31(3):277-287.Qin Jianzhong,Wang Jie,Qiu Nansheng,et al.New paleo-geotherm om eters for the inversion of dynam ic therm al evolu-tion history ofm arine sequences in South China[J].Oil&GasGeology,2010,31(3):277-287.
[12]陈钢花,余杰,张孝珍.基于小波时频分析的测井层序地层划分方法[J].新疆石油地质,2007,28(3):355.Chen Ganghua,Yu Jie,Zhang Xiaozhen.Logging sequencestratigraphic division based on wavelet time-frequency analysis[J].Xinjiang Petroleum Geology,2007,28(3):355.
[13]陈昭佑,王光强.鄂尔多斯盆地大牛地气田山西组砂体组合类型及成因模式[J].石油与天然气地质,2010,31(5):632-639.Chen Zhaoyou,Wang Guangqiang.Assemblage types and genet-ic models of the Shanxi sandbodies in Daniudi gasfield,the Or-dos Basin[J].Oil&Gas Geology,2010,31(5):632-639.
[14]李江涛,余继峰,李增学.基于测井数据小波变换的层序划分[J].煤田地质与勘探,2004,32(2):48-50.Li Jiangtao,Yu Jifeng,Li Zengxue.The demarcating of strati-graphic sequence based on wavelet transform of well-logging data[J].Coal Geology&Exploration,2004,32(2):48-50.
[15]余继峰,李增学.测井数据小波变换及其地质意义[J].中国矿业大学学报,2003,32(3):336-339.Yu Jifeng,Li Zengxue.Wavelet transform of logging data andits geological significance[J].Journal of China University ofMining&Technology,2003,32(3):336-339.
[16]李霞,范宜仁,邓少贵.Morlet小波在测井层序地层划分中的应用[J].勘探地球物理进展,2006,29(6):403.Li Xia,Fan Yiren,Deng Shaogui.Application of Morlet wave-let in sequence stratigraphic division on well-logging data[J].Progress in Exploration Geophysics,2006,29(6):403.
[17]张顺存,陈丽华,周新艳,等.准噶尔盆地克百断裂下盘二叠系砂砾岩的沉积模式[J].石油与天然气地质,2009,30(6):740-746.Zhang Shuncun,Chen Lihua,Zhou Xinyan,et al.Sedimentarymodel of the Permian sandy conglomerate in the footwall of theKebai Fault,the Junggar Basin[J].Oil&Gas Geology,2009,30(6):740-746.
[18]赵伟,姜在兴,邱隆伟,等.小波分析划分层序单元的地质学理论基础、方法与应用[J].石油与天然气地质,2010,31(4):436-441.Zhao Wei,Jiang Zaixing,Qiu Longwei,et al.Geological con-cept,method and application of sequence unit identificationthrough wavelet analysis[J].Oil&Gas Geology,2010,31(4):436-441.
[19]宋亮,张营革,苏朝光,等.断陷湖盆陡坡带砂砾岩体真构造恢复与内幕旋回划分——以车镇凹陷北带中浅层近岸扇体为例[J].石油地球物理勘探,2010,45(S1):119.Song Liang,Zhang Yingge,Su Chaoguang.True structure re-covery and internal cycle division in glutenite in the steep slopzone of faulting-depression basin—an example from the middle-shallow near-shore fans in the northern of Chezhen Sag[J].Oil Geophysical Prospecting,2010,45(S1):119.
[2]李小梅,俞娟丽.时频分析技术在层序旋回划分中的应用[J].石油与天然气地质,2008,29(6):793-796.Li Xiaomei,Yu Juanli.Application of time-frequency analysisto division of cyclical sequence[J].Oil&Gas Geology,2008,29(6):793-796.
[3]鲜本忠,王永诗.基于小波变换基准面恢复的砂砾岩期次划分与对比[J].中国石油大学学报(自然科学版),2008,32(6):1-4.Xian Benzhong,Wang Yongshi.Division and correlation of glu-tenite sedimentary cycles based on base-level restoration usingwavelet transform[J].Journal of China University of Petroleum(Edition of Natural Science),2008,32(6):1-4.
[4]郭玉新,隋风贵,林会喜,等.时频分析技术划分砂砾岩沉积期次方法探讨——以渤南洼陷北部陡坡带沙四段—沙三段为例[J].油气地质与采收率,2009,16(5):8-10.Guo Yuxin,Sui Fenggui,Lin Huixi,et al.Discussion on thedivision and correlation of glutinite sedimentary period by time-frequency analysis——a case study of Sha4 to Sha3 member ofnorthern abrupt slope zone in Bonan Depression[J].Petrole-um Geology and Recovery Efficiency,2009,16(5):8-10.
[5]王起琮.旋回层序地层的控制因素[J].石油与天然气地质,2009,30(5):648-656.Wang Qicong.Controlling factors of cyclic sequence stratigraphy[J].Oil&Gas Geology,2009,30(5):648-656.
[6]张小会,赵重远.鄂尔多斯盆地上三叠统延长组米兰科维奇旋回的确定[J].石油与天然气地质,2002,23(4):372-375.Zhang Xiaohui,Zhao Zhongyuan.Definition of milankovitch cy-cles for yanchang formation of the upper Triassic in Ordos Basin[J].Oil&Gas Geology,2002,23(04):372-375.
[7]金之钧,范国章,刘国臣.一种地层精细定年的新方法[J].地球科学——中国地质大学学报,1999,24(4):380.Jin Zhijun,Fan Guozhang,Liu Guochen.A new method foraccurate dating of strata[J].Earth Science—Journal of ChinaUniversity of Geosciences,1999,24(4):380.
[8]张海峰,张林晔,姚益民,等.东营凹陷沙河街组四段滩坝砂米氏旋回层序划分与对比[J].地层学杂志,2008,32(3):279-280.Zhang Haifeng,Zhang Linye,Yao Yimin,et al.MilankovitchCycles and sequence division and correlation of the member 4of the Shahejie formation in the Dongying Depression,Shan-dong[J].Journal of Stratigraphy,2008,32(3):279-280.
[9]李凤杰,郑荣才,赵俊兴.鄂尔多斯盆地米兰科维奇旋回在延长组发育的一致性[J].西安石油大学学报(自然科学版),2008,23(5):2-5.Li Fengjie,Zheng Rongcai,Zhao Junxing.Uniformity of theMilankovitch Cycle developed in the Yanchang Formation ineast Gansu with the Milankovitch Cycle developed in other are-as in Ordos Basin[J].Journal of Xi’an Shiyou University(Natural Science Edition),2008,23(5):2-5.
[10]张海峰.以米氏旋回为标尺进行高级别层序地层划分与对比——以准噶尔盆地中Ⅰ区块为例[J].油气地质与采收率,2006,13(4):18-20.Zhang Haifeng.Highresolution sequence stratigraphic classifica-tion and correlation by using Milankovitch Cycles as rulers-takingthe Zhong I block in Junggar Basin as an example[J].PetroleumGeology and Recovery Efficiency,2006,13(4):18-20.
[11]秦建中,王杰,邱楠生,等.反演南方海相层系热史动态演化的新温标——磷灰石、锆石(U-Th)/He年龄和封闭温度[J].石油与天然气地质,2010,31(3):277-287.Qin Jianzhong,Wang Jie,Qiu Nansheng,et al.New paleo-geotherm om eters for the inversion of dynam ic therm al evolu-tion history ofm arine sequences in South China[J].Oil&GasGeology,2010,31(3):277-287.
[12]陈钢花,余杰,张孝珍.基于小波时频分析的测井层序地层划分方法[J].新疆石油地质,2007,28(3):355.Chen Ganghua,Yu Jie,Zhang Xiaozhen.Logging sequencestratigraphic division based on wavelet time-frequency analysis[J].Xinjiang Petroleum Geology,2007,28(3):355.
[13]陈昭佑,王光强.鄂尔多斯盆地大牛地气田山西组砂体组合类型及成因模式[J].石油与天然气地质,2010,31(5):632-639.Chen Zhaoyou,Wang Guangqiang.Assemblage types and genet-ic models of the Shanxi sandbodies in Daniudi gasfield,the Or-dos Basin[J].Oil&Gas Geology,2010,31(5):632-639.
[14]李江涛,余继峰,李增学.基于测井数据小波变换的层序划分[J].煤田地质与勘探,2004,32(2):48-50.Li Jiangtao,Yu Jifeng,Li Zengxue.The demarcating of strati-graphic sequence based on wavelet transform of well-logging data[J].Coal Geology&Exploration,2004,32(2):48-50.
[15]余继峰,李增学.测井数据小波变换及其地质意义[J].中国矿业大学学报,2003,32(3):336-339.Yu Jifeng,Li Zengxue.Wavelet transform of logging data andits geological significance[J].Journal of China University ofMining&Technology,2003,32(3):336-339.
[16]李霞,范宜仁,邓少贵.Morlet小波在测井层序地层划分中的应用[J].勘探地球物理进展,2006,29(6):403.Li Xia,Fan Yiren,Deng Shaogui.Application of Morlet wave-let in sequence stratigraphic division on well-logging data[J].Progress in Exploration Geophysics,2006,29(6):403.
[17]张顺存,陈丽华,周新艳,等.准噶尔盆地克百断裂下盘二叠系砂砾岩的沉积模式[J].石油与天然气地质,2009,30(6):740-746.Zhang Shuncun,Chen Lihua,Zhou Xinyan,et al.Sedimentarymodel of the Permian sandy conglomerate in the footwall of theKebai Fault,the Junggar Basin[J].Oil&Gas Geology,2009,30(6):740-746.
[18]赵伟,姜在兴,邱隆伟,等.小波分析划分层序单元的地质学理论基础、方法与应用[J].石油与天然气地质,2010,31(4):436-441.Zhao Wei,Jiang Zaixing,Qiu Longwei,et al.Geological con-cept,method and application of sequence unit identificationthrough wavelet analysis[J].Oil&Gas Geology,2010,31(4):436-441.
[19]宋亮,张营革,苏朝光,等.断陷湖盆陡坡带砂砾岩体真构造恢复与内幕旋回划分——以车镇凹陷北带中浅层近岸扇体为例[J].石油地球物理勘探,2010,45(S1):119.Song Liang,Zhang Yingge,Su Chaoguang.True structure re-covery and internal cycle division in glutenite in the steep slopzone of faulting-depression basin—an example from the middle-shallow near-shore fans in the northern of Chezhen Sag[J].Oil Geophysical Prospecting,2010,45(S1):119.
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