地震频谱成像的地质含义及在沉积特征研究中的应用
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摘要
在总结地震频谱成像几方面地质含义的基础上,通过井资料、砂岩预测厚度及地震属性等资料,验证了松辽盆地北部朝阳沟油田朝86井区振幅调谐体分频切片所能反映出的地质信息:该区扶余Ⅰ油层东西两侧具有不同的沉积特点。东部单期河道发育厚度大,但期次少,砂岩总厚度小,沉积物来自东北方向;西侧河道发育厚度薄,期次多,砂岩总厚度较大,沉积物来自西南方向。利用分频切片不但可以较准确地识别河道砂体展布形态、反映砂岩厚度分布特征,同时还可反映出研究区沉积物源、薄储层纵向变化及平面分布规律等沉积特征。
The accurate understanding and rational application of the geologic implications of seismic spectrum imaging are helpful to precise description of reservoir distribution patterns and sedimentary features.On the basis of summarizing geological implications of seismic spectrum imaging,we validated the geological imformation reflected by the frequency division slice of amplitude tuning cube of the Chao-86 wellblock in the Chaoyanggou oilfield with well data,estimated thickness of sandstone and seismic attributes.The Fu-I oil layer in the study area has different sedimentary features in the east and west sides.In the east side,although the single channel sandbody is thick,the total thickness of sandstones is small due to the small number of superimposed channel sands.The sediments are sourced from the provenance in the northeast.In contrast,in the west side,although the single channel sandbody is thin,the total thickness of sandstones is relatively large,thanks to the large number of superimposed channel sands.The sediments came from the provenance in the southwest.Frequency division slices not only can accurately reflect the areal distribution and vertical thickness of the channel sandbodies,but also can indicate the provenance,vertical variation and areal distribution of thin reservoirs.
The accurate understanding and rational application of the geologic implications of seismic spectrum imaging are helpful to precise description of reservoir distribution patterns and sedimentary features.On the basis of summarizing geological implications of seismic spectrum imaging,we validated the geological imformation reflected by the frequency division slice of amplitude tuning cube of the Chao-86 wellblock in the Chaoyanggou oilfield with well data,estimated thickness of sandstone and seismic attributes.The Fu-I oil layer in the study area has different sedimentary features in the east and west sides.In the east side,although the single channel sandbody is thick,the total thickness of sandstones is small due to the small number of superimposed channel sands.The sediments are sourced from the provenance in the northeast.In contrast,in the west side,although the single channel sandbody is thin,the total thickness of sandstones is relatively large,thanks to the large number of superimposed channel sands.The sediments came from the provenance in the southwest.Frequency division slices not only can accurately reflect the areal distribution and vertical thickness of the channel sandbodies,but also can indicate the provenance,vertical variation and areal distribution of thin reservoirs.
引文
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2范洪军,李军,肖毓祥,等.地震分频技术在扇三角洲演化过程研究中的应用[J].石油与天然气地质,2007,28(5):682～686,692
3徐丽英,徐鸣洁,陈振岩.利用谱分解技术进行薄储层预测[J].石油地球物理勘探,2006,41(3):299～302
4盛秋红,肖兰雄.频谱成像技术在采穴构造储层预测中的应用[J].石油与天然气地质,2008,29(1):141～145
5 Partyka G,Gridley J,Lopez J.Interpretational applications of spec-tral decomposition in reservoir characterization[J].The LeadingEdge,1999,18(3):353-360
6 Peyton L,Bottjer R,Partyka G.Intepretation of incised valleysusing new3-D seismic techniques:Acase history using spectral de-composition and coherency[J].The leading Edge,1998,17(10):1 294-1 298
7赵力及.利用地震频谱比进行河道砂体预测[J].石油实验地质,2003,25(3):244～246
8 Greg Partyka,James Gridley,John Lopez.Interpretational applica-tions of apectral decomposition in reservoir characterization[J].The Leading Edge,1999(3):353-360
9 Widess MB.How thin is a thin bed?[J].Geophysics,1973,38(6):1 173-1 180
10 Aydm Akan,Luis F.Evolutionary chirp represen-tation of non-sta-tionary signals via Gabor transform[J].Signal Processing,2001,81(1):2 429-2 436
11 Stockwell R G,Mansinha L,Lowe R P.Localization of the com-plex spectrum:the S-transform[J].Signal Processing,1996,44(4):998-1 001
12刘丽丽,赵中禾,李亮,等.变尺度分形技术在裂缝预测和储层评价中的应用[J].石油与天然气地质,2008,29(1):31～37
13 Pinnegar C R,Mansinha L.The S-transform with windows of ar-bitrary and varying shape[J].Geophysics,2003,68(1):381-385
14 John P,Shengjie Sun.Comparison of spectral decomposition meth-ods[J].EAGE,2006,24(1):75-79
15 Yanghua Wang.Seismic time-frequency spectral decomposition bymatching pursuit[J].Geophysics,2007,72(1):13-20
16张尔华,宋永忠,陈述民,等.松辽盆地扶杨油层河道砂体地震识别方法[J].大庆石油地质与开发,2004,23(5):113～115
17刘浩杰,魏国华.井间地震资料的频谱分析及其与地震资料的联合应用[J].油气地质与采收率,2008,15(5):56～58
18杨林.地震频谱分解技术应用中有关问题的讨论[J].石油物探,2008,47(4):405～409
19韩喜,高兴友,车延信,等.利用地震属性沿层分析方法研究河流相沉积环境[J].石油地球物理勘探,2007,42(1):120～124
20胡光义,王加瑞,武士尧.利用地震分频处理技术预测河流相储层[J].中国海上油气,2005,17(4):237～239
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