叠前分角度道集的瞬时谱差异信息提取及应用
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摘要
基于不同角度叠加道集中含流体层地震反射波的振幅(或能量)及其低频信息变化更明显的特性,本文提出了一种利用叠前不同角度叠加道集的低频地震信息进行流体识别的方法,即分别对小(近)角度和大(远)角度叠加的地震道集进行瞬时谱分解,再利用低频分量构建瞬时谱差异信息提取的计算公式,进而得到流体识别剖面。文中应用该方法分别处理了陆上和海上资料,检测的油气异常与实际钻井结果相符。
Since seismic reflection amplitude(or energy) and its low frequency components of the fluid-filled reservoirs on different angle stack gathers vary significantly,this paper presents a new fluid identification method using seismic low frequency components on prestack different angle stack gathers.The method first carries out instantaneous spectral decomposition of both near-angle and far-angle stack gathers,and then introduces an instantaneous spectral difference extraction formula by the low frequency spectral components.Finally a fluid identification section is obtained.Applications of the method on both offshore and onshore seismic data are given respectively in the paper.The results show that the detected hydrocarbon anomaly is consistent with the actual drilling.
Since seismic reflection amplitude(or energy) and its low frequency components of the fluid-filled reservoirs on different angle stack gathers vary significantly,this paper presents a new fluid identification method using seismic low frequency components on prestack different angle stack gathers.The method first carries out instantaneous spectral decomposition of both near-angle and far-angle stack gathers,and then introduces an instantaneous spectral difference extraction formula by the low frequency spectral components.Finally a fluid identification section is obtained.Applications of the method on both offshore and onshore seismic data are given respectively in the paper.The results show that the detected hydrocarbon anomaly is consistent with the actual drilling.
引文
[1]Rutherford S R,Williams R H.Amplitude-versus-off-set variation in gas sands.Geophysics,1989,54(6):680～688
[2]Castagna J P,Swan H W,Foster D J.Framework forAVO gradient and intercept interpretation.Geophys-ics,1998,63(3):948～956
[3]Hilterman F J著;孙夕平译.地震振幅解释(中文版).北京:石油工业出版社,2006
[4]Chen G,Matteucci G,Fahmy B et al.Spectral-decom-position response to reservoir fluids from a deepwaterWest Africa reservoir.Geophysics,2008,73(6):C23～C30
[5]Goloshubin G M,Connie V A,Korneev V A et al.Reservoir imaging using low frequencies of seismicreflections.The Leading Edge,2006,25(5):527～
[6]Paige D S.The dark side of the bright spot.∥TheGSH lithology and direct detection of hydrocarbons u-sing geophysical methods symposium,1973
[7]Ghosh D.Geophysical issues and challenges in South-east Asia with emphasis on Malay Basin.∥SEG Hon-orary Lecturer-South&East Asia symposium,2010
[8]Goodway W,Chen T,Downton J.Improved AVOfluid detection and lithology discrimination usingLamépetrophysical parameters:“λρ”,“μρ”,“λ/μflu-id stack”from P and S inversion.SEG TechnicalProgram Expanded Abstracts,1997,16:183～186
[9]Russell B H,Hedlin K,Hilterman F J et al.Fluid-property discrimination with AVO:A Biot-Gassmannperspective.Geophysics,2003,68(1):29～39
[10]宁忠华,贺振华,黄德济.基于地震资料的高灵敏度流体因子.石油物探,2006,45(3):239～242Ning Zhonghua,He Zhenhua,Huang Deji.High sen-sitive fluid identification based on seismic data.GPP,2006,45(3):239～242
[11]贺振华,王栋.扩展流体识别因子及应用.矿物岩石,2009,29(4):100～103He Zhenhua,Wang Dong.Expended fluid detectionfactor and its application.Journal of Mineralogyand Petrology,2009,29(4):100～103
[12]印兴耀,张世鑫,张繁昌等.利用基于Russell近似的弹性波阻抗反演进行储层描述和流体识别.石油地球物理勘探,2010,45(3):373～380Yin Xing-yao,Zhang Shi-xin,Zhang Fan-chang et al.Utilizing Russell approximation-based elastic waveimpedance inversion to conduct reservoir descriptionand fluid identification.OGP,2010,45(3):373～380
[13]陈学华,贺振华,黄德济.基于广义S变换的地震资料高效时频谱分解.石油地球物理勘探,2008,43(5):530～534Chen Xue-hua,He Zhen-hua,Huang De-ji.High-effi-cient time-frequency spectrum decomposition of seis-mic data based on generalized S transform.OGP,2008,43(5):530～534
[14]陈学华,贺振华,黄德济等.时频域油气储层低频阴影检测.地球物理学报,2009,52(1):215～221Chen Xuehua,He Zhenhua,Huang Deji et al.Lowfrequency shadow detection of gas reservoirs in time-frequency domain.Chinese Journal of Geophysics,2009,52(1):215～221
[2]Castagna J P,Swan H W,Foster D J.Framework forAVO gradient and intercept interpretation.Geophys-ics,1998,63(3):948～956
[3]Hilterman F J著;孙夕平译.地震振幅解释(中文版).北京:石油工业出版社,2006
[4]Chen G,Matteucci G,Fahmy B et al.Spectral-decom-position response to reservoir fluids from a deepwaterWest Africa reservoir.Geophysics,2008,73(6):C23～C30
[5]Goloshubin G M,Connie V A,Korneev V A et al.Reservoir imaging using low frequencies of seismicreflections.The Leading Edge,2006,25(5):527～
[6]Paige D S.The dark side of the bright spot.∥TheGSH lithology and direct detection of hydrocarbons u-sing geophysical methods symposium,1973
[7]Ghosh D.Geophysical issues and challenges in South-east Asia with emphasis on Malay Basin.∥SEG Hon-orary Lecturer-South&East Asia symposium,2010
[8]Goodway W,Chen T,Downton J.Improved AVOfluid detection and lithology discrimination usingLamépetrophysical parameters:“λρ”,“μρ”,“λ/μflu-id stack”from P and S inversion.SEG TechnicalProgram Expanded Abstracts,1997,16:183～186
[9]Russell B H,Hedlin K,Hilterman F J et al.Fluid-property discrimination with AVO:A Biot-Gassmannperspective.Geophysics,2003,68(1):29～39
[10]宁忠华,贺振华,黄德济.基于地震资料的高灵敏度流体因子.石油物探,2006,45(3):239～242Ning Zhonghua,He Zhenhua,Huang Deji.High sen-sitive fluid identification based on seismic data.GPP,2006,45(3):239～242
[11]贺振华,王栋.扩展流体识别因子及应用.矿物岩石,2009,29(4):100～103He Zhenhua,Wang Dong.Expended fluid detectionfactor and its application.Journal of Mineralogyand Petrology,2009,29(4):100～103
[12]印兴耀,张世鑫,张繁昌等.利用基于Russell近似的弹性波阻抗反演进行储层描述和流体识别.石油地球物理勘探,2010,45(3):373～380Yin Xing-yao,Zhang Shi-xin,Zhang Fan-chang et al.Utilizing Russell approximation-based elastic waveimpedance inversion to conduct reservoir descriptionand fluid identification.OGP,2010,45(3):373～380
[13]陈学华,贺振华,黄德济.基于广义S变换的地震资料高效时频谱分解.石油地球物理勘探,2008,43(5):530～534Chen Xue-hua,He Zhen-hua,Huang De-ji.High-effi-cient time-frequency spectrum decomposition of seis-mic data based on generalized S transform.OGP,2008,43(5):530～534
[14]陈学华,贺振华,黄德济等.时频域油气储层低频阴影检测.地球物理学报,2009,52(1):215～221Chen Xuehua,He Zhenhua,Huang Deji et al.Lowfrequency shadow detection of gas reservoirs in time-frequency domain.Chinese Journal of Geophysics,2009,52(1):215～221
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