地震分频解释技术在河道砂预测中的应用
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摘要
地震资料分频处理技术是一种比常规地震属性识别储层更有效的方法。该方法将一定时窗内地震反射波通过离散傅里叶变从时间域换转换到频率域,用转换后的振幅谱和相位谱识别薄储层的厚度变化和边界。通过该技术可以对地震资料中所有单频信号进行有针对性的分析,已经证明是一种具有较高可信度的技术。针对胜利油田老河口油田老168井区馆陶组河道砂油藏厚度薄、横向变化大的地质特征,本文运用分频处理技术对该井区馆陶组地层砂体分布进行预测,并对储层非均质性进行了分析,经钻井证实,预测结果与实际情况十分吻合。
Spectral decomposition is a more efficient method to identify reservoir than seismic attribute.It transforms the time domain of the seismic data in a certain time windows into the frequency domain by Discrete Fourier Transform.The reservoir thickness changes and boundary can be identified and imaged by the new amplitude spectrum and phase spectrum.The DFT computes an amplitude value at every hertz from the beginning frequency to the ending frequency,it has a highly deserved reputation for being safe and reliable.The fluvial sand body of Guantao formation in the Laohekou Oilfield is characteristic of thin thickness and severe variety in lateral direction.The thickness and geologic discontinuity and distribution of the sand body are predicted by the method of spectral decomposition.The results coincide well with actual drilling data.
Spectral decomposition is a more efficient method to identify reservoir than seismic attribute.It transforms the time domain of the seismic data in a certain time windows into the frequency domain by Discrete Fourier Transform.The reservoir thickness changes and boundary can be identified and imaged by the new amplitude spectrum and phase spectrum.The DFT computes an amplitude value at every hertz from the beginning frequency to the ending frequency,it has a highly deserved reputation for being safe and reliable.The fluvial sand body of Guantao formation in the Laohekou Oilfield is characteristic of thin thickness and severe variety in lateral direction.The thickness and geologic discontinuity and distribution of the sand body are predicted by the method of spectral decomposition.The results coincide well with actual drilling data.
引文
[1]Yilmazz.Seismic Data Analysis[M].Tulsa:Society of Explo-ration Geophysicists,1987.
[2]Yun Meihou,Ding Wei,Wang Xinhong.Study and application ofseismic horizontal resolution[J].Progress in Exploration Geophys-ics,2005,28(2):102-107.[云美厚,丁伟,王新红.地震水平分辨力研究与应用[J].勘探地球物理进展,2005,28(2):102-107.]
[3]Zhou Jinming,Xiong Weng.Seismic Data Fine Processing[M].Beijing:Petroleum Industry Press,2003.[周锦明,熊翁.地震数据精细处理[M].北京:石油工业出版社,2003.]
[4]Partyka G,Gridkey J,Lopex J.Interpretational applications ofspectral decoposition in reservoir characterization[J].The LeadingEdge,1999,18(3):353-360.
[5]Marple S L.Frequency resolution of Fourier and maximum entropyspectral estimates[J].Geophysics,1982,47(9):1 303-1 307.
[6]Cai Rui.Applications of spectral decomposition technique to reser-voir prediction[J].Computerized Tomography Theory and Applica-tions,2003,12(2):22-25.[蔡瑞.谱分解技术在储层预测中的应用[J].CT理论与应用研究,2003,12(2):22-25.]
[7]Zhu Qingrong,Zhang Yueqian,Yu Xinghe.Application of spectradecomposition to reservoir characterization[J].Journal of Mineral-ogy and Petrology,2003,93(3):33-37.[朱庆荣,张越迁,于兴河.分频解释技术在表征储层中的运用[J].矿物岩石,2003,93(3):33-37.]
[8]Yao Zhongrui,Qiao Yulei,Bi Junfeng.The technique of spectraldecomposition and its application in cross-well reservoir interpreta-tion[J].Petroleum Geophysics,2005,3(1):32-35.[姚忠瑞,乔玉雷,毕俊凤.谱分解技术及其在井间储层解释中的应用[J].油气地球物理,2005,3(1):32-35.]
[9]Xue Dali,Xu Mingjie,Gong Yaojin,et al.Application of frequen-cy-shared interpretation technique in reservoir prediction of Shen143 well area[J].Petroleum Geology&Oilfield Development inDaqing,2007,26(3):128-131.[薛大力,徐鸣洁,龚姚进,等.地震分频解释技术在沈143井区储层预测中的应用[J].大庆石油地质与开发,2007,26(3):128-131.]
[2]Yun Meihou,Ding Wei,Wang Xinhong.Study and application ofseismic horizontal resolution[J].Progress in Exploration Geophys-ics,2005,28(2):102-107.[云美厚,丁伟,王新红.地震水平分辨力研究与应用[J].勘探地球物理进展,2005,28(2):102-107.]
[3]Zhou Jinming,Xiong Weng.Seismic Data Fine Processing[M].Beijing:Petroleum Industry Press,2003.[周锦明,熊翁.地震数据精细处理[M].北京:石油工业出版社,2003.]
[4]Partyka G,Gridkey J,Lopex J.Interpretational applications ofspectral decoposition in reservoir characterization[J].The LeadingEdge,1999,18(3):353-360.
[5]Marple S L.Frequency resolution of Fourier and maximum entropyspectral estimates[J].Geophysics,1982,47(9):1 303-1 307.
[6]Cai Rui.Applications of spectral decomposition technique to reser-voir prediction[J].Computerized Tomography Theory and Applica-tions,2003,12(2):22-25.[蔡瑞.谱分解技术在储层预测中的应用[J].CT理论与应用研究,2003,12(2):22-25.]
[7]Zhu Qingrong,Zhang Yueqian,Yu Xinghe.Application of spectradecomposition to reservoir characterization[J].Journal of Mineral-ogy and Petrology,2003,93(3):33-37.[朱庆荣,张越迁,于兴河.分频解释技术在表征储层中的运用[J].矿物岩石,2003,93(3):33-37.]
[8]Yao Zhongrui,Qiao Yulei,Bi Junfeng.The technique of spectraldecomposition and its application in cross-well reservoir interpreta-tion[J].Petroleum Geophysics,2005,3(1):32-35.[姚忠瑞,乔玉雷,毕俊凤.谱分解技术及其在井间储层解释中的应用[J].油气地球物理,2005,3(1):32-35.]
[9]Xue Dali,Xu Mingjie,Gong Yaojin,et al.Application of frequen-cy-shared interpretation technique in reservoir prediction of Shen143 well area[J].Petroleum Geology&Oilfield Development inDaqing,2007,26(3):128-131.[薛大力,徐鸣洁,龚姚进,等.地震分频解释技术在沈143井区储层预测中的应用[J].大庆石油地质与开发,2007,26(3):128-131.]
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