利用地震资料时频特征分析沉积旋回
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摘要
地震资料中蕴含了丰富的地下沉积体信息,采用小波变换时频分析技术可以使一维的时间域地震波信号拓展到二维的时间-频率域,从而在频谱图中更清楚地刻画沉积体内部的旋回结构特征。通过建立不同类型的沉积模型,分析了进积、退积、加积沉积环境下,沉积体对应地震信号时频图中的变化规律。实际资料验证表明,时频图中能量团移动方向与岩石物性变化趋势一致。该方法为无钻井地区分析沉积旋回特征提供了一种新的思路和途径。
Seismic data contain abundant information on underground sedimentary body. Using wavelet transform time-frequency analysis can allow one-dimensional time domain signal expand to two-dimensional seismic wave time-frequency domain, and then the spectrum can more clearly depict the sedimentary cycle structure of the internal body. Through the establishment of different types of sedimentary models, the change law of the sedimentary body corresponding to seismic signal in the time-frequency map in progradation, aggradation and retrogradation sedimentary environment is analyzed. The actual data show that the energy group moving direction in the time-frequency map is consistent with petrophysics variation. This method provides a new way of thinking and approach in studying sedimentary cycle in non-drilling area.
Seismic data contain abundant information on underground sedimentary body. Using wavelet transform time-frequency analysis can allow one-dimensional time domain signal expand to two-dimensional seismic wave time-frequency domain, and then the spectrum can more clearly depict the sedimentary cycle structure of the internal body. Through the establishment of different types of sedimentary models, the change law of the sedimentary body corresponding to seismic signal in the time-frequency map in progradation, aggradation and retrogradation sedimentary environment is analyzed. The actual data show that the energy group moving direction in the time-frequency map is consistent with petrophysics variation. This method provides a new way of thinking and approach in studying sedimentary cycle in non-drilling area.
引文
[1]刘振峰,郝天珧,范国章.沉积旋回的地球物理研究[J].石油实验地质,2004,26(3):258-262.
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[4]张军华,王永刚,杨国权,等.地震旋回体的概念及应用[J].石油地球物理勘探,2003,38(3):281-284.
[5]吴国忱,康仁华,印兴耀.三维时频分析方法在地震层序分析中的应用[J].石油大学学报:自然科学版,2000,24(1):81-84.
[6]杨福生.小波变换的工程分析与应用[M].北京:科学出版社,1999:32-33.
[7]Weimer P,Posamentier H W.Siliciclastic sequence stratigraphy:Recent developments and applications[J].AAPG Memoir,1993,58:11-79.
[8]边立恩,贺振华,黄德济.饱含流体介质的地震波场特征及频率分布[J].岩性油气藏,2008,20(3):74-78.
[9]王威,李臻,田敏,等.岩性-地层油气藏勘探方法技术研究现状及进展[J].岩性油气藏,2009,21(2):121-125.
[10]卫平生,潘建国,张虎权,等.地震储层学的概念、研究方法和关键技术[J].岩性油气藏,2010,22(2):1-6.
[11]潘建国,卫平生,张虎权,等.地震储层学与相关学科的比较[J].岩性油气藏,2010,22(3):1-4.
[2]Mushin I A,Makarov V V.Structural-formational interpretation tools for seismic stratigraphy[J].Geophysical Prospecting,2000,48(6):953-981.
[3]杜世通.层序框架下的地震高分辨率资料解释[J].油气地球物理,2004,2(4):66-77.
[4]张军华,王永刚,杨国权,等.地震旋回体的概念及应用[J].石油地球物理勘探,2003,38(3):281-284.
[5]吴国忱,康仁华,印兴耀.三维时频分析方法在地震层序分析中的应用[J].石油大学学报:自然科学版,2000,24(1):81-84.
[6]杨福生.小波变换的工程分析与应用[M].北京:科学出版社,1999:32-33.
[7]Weimer P,Posamentier H W.Siliciclastic sequence stratigraphy:Recent developments and applications[J].AAPG Memoir,1993,58:11-79.
[8]边立恩,贺振华,黄德济.饱含流体介质的地震波场特征及频率分布[J].岩性油气藏,2008,20(3):74-78.
[9]王威,李臻,田敏,等.岩性-地层油气藏勘探方法技术研究现状及进展[J].岩性油气藏,2009,21(2):121-125.
[10]卫平生,潘建国,张虎权,等.地震储层学的概念、研究方法和关键技术[J].岩性油气藏,2010,22(2):1-6.
[11]潘建国,卫平生,张虎权,等.地震储层学与相关学科的比较[J].岩性油气藏,2010,22(3):1-4.
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