利用储层的频谱吸收特性识别油气藏
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摘要
窗函数能量归一化的改进广义S变换能在保持时间分辨率不降低的前提下,提高频率域分辨率。本文基于改进广义S变换,通过黏弹性介质波动方程正演模拟,研究黏弹性介质储层的频谱吸收特性。地震波穿过含油气储层时,高频能量相对于低频能量衰减更强,其频谱特征为低频能量相对增加、高频能量相对衰减,因此储层的频谱吸收特性能很好地指示储层的油气富集程度。理论模型和实际井旁地震道的频谱分析结果验证了应用频谱吸收特性检测储层含油气性的有效性和可行性。
Improved generalized S transform of window function normalized energy improves the frequency resolution with time resolution not lowering at the same time.Through the forward modeling of visco-elastic wave equation,we discuss in this paper spectrum absorption characteristics of reservoir based on improved generalized S transform.When seismic waves pass through reservoir,high frequency energy attenuation is more severe than low frequency.So spectrum absorption characteristics show that low frequency energy is relatively augmented,and high frequency energy relatively diminished.The spectrum absorption characteristics can indicate the concentrated degree of petroleum in reservoir.The frequency spectrum analysis of model data and real seismic data near wells proves the effectiveness and feasibility of this method.
Improved generalized S transform of window function normalized energy improves the frequency resolution with time resolution not lowering at the same time.Through the forward modeling of visco-elastic wave equation,we discuss in this paper spectrum absorption characteristics of reservoir based on improved generalized S transform.When seismic waves pass through reservoir,high frequency energy attenuation is more severe than low frequency.So spectrum absorption characteristics show that low frequency energy is relatively augmented,and high frequency energy relatively diminished.The spectrum absorption characteristics can indicate the concentrated degree of petroleum in reservoir.The frequency spectrum analysis of model data and real seismic data near wells proves the effectiveness and feasibility of this method.
引文
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[2]李振春,刁瑞,韩文功等.线性时频分析方法综述.勘探地球物理进展,2010,33(4):239～246Li Zhenchun,Diao Rui,Han Wengong et al.Reviewon linear time frequency analysis methods.Progressin Exploration Geophysics,2010,33(4):239～246
[3]Mansinha L,Stockwell R,Lowe R et al.Local S-spec-trum analysis of 1-D and 2-D data.Physics of theEarth and Planrtary Interiors,1997,103(3):329～336
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[8]李宏兵,赵文智,曹宏等.小波尺度域含气储层地震波衰减特征.地球物理学报,2004,47(5):892～898Li Hongbing,Zhao Wenzhi,Cao Hong et al.Charac-teristics of seismic attenuation of gas reservoirs inwavelet domain.Chinese J Geophys,2004,47(5):892～898
[9]郭栋,韩文功,王兴谋等.地层吸收特征参数分析预测深层气藏方法.油气地球物理,2008,6(3):20～24Guo Dong,Han Wengong,Wang Xingmou et al.Pre-diction deep gas pool by formation absorption charac-teristic parameter.Petroleum Geophysics,2008,6(3):20～24
[10]狄帮让,裴正林,夏吉庄等.薄互层油藏模型黏弹性波方程正演模型研究.石油地球物理勘探,2009,44(5):622～629Di Bangrang,Pei Zhenglin,Xia Jizhuang et al.For-ward simulation of viscoelastic wave equation in thin-interbeded reservoir model.OGP,2009,44(5):622～629
[11]刘兰峰,曹思远,李绪宣等.未固结含气砂岩储层低频地震响应特征研究.石油地球物理勘探,2010,45(6):873～878Liu Lanfeng,Cao Siyuan,Li Xuxuan et al.Studies onthe characteristics of frequency seismic response fromunconsolidated gas-bearing sand reservoir.OGP,2010,45(6):873～878
[12]孙成禹.地震波理论与方法.山东东营:中国石油大学出版社,2007
[13]张益明,李绪宣,符力耘.瞬时子波吸收分析技术的应用——以中国近海天然气检测为例.石油物探,2009,48(4):368～376Zhang Yiming,Li Xuxuan,Fu Liyun.Application ofinstantaneous wavelet absorption analysis technology:case study on offshore gas detection in China.GPP,2009,48(4):368～376
[2]李振春,刁瑞,韩文功等.线性时频分析方法综述.勘探地球物理进展,2010,33(4):239～246Li Zhenchun,Diao Rui,Han Wengong et al.Reviewon linear time frequency analysis methods.Progressin Exploration Geophysics,2010,33(4):239～246
[3]Mansinha L,Stockwell R,Lowe R et al.Local S-spec-trum analysis of 1-D and 2-D data.Physics of theEarth and Planrtary Interiors,1997,103(3):329～336
[4]Pinnegar C R,Mansinha L.The S-transform withwindows of arbitrary and varying shape.Geophysics,2003,68(1):381～385
[5]高静怀,陈文超,李幼铭等.广义S变换与薄互层地震响应分析.地球物理学报,2003,46(4):526～532Gao Jinghuai,Chen Wenchao,Li Youming et al.Generalized S transform and seismic response analysisof thin interbeds.Chinese J Geophys,2003,46(4):526～532
[6]陈学华,贺振华.改进的S变换及其在地震信号处理中的应用.数据采集与处理,2005,20(4):449～453Chen Xuehua,He Zhenhua.Improved S transformand its application in seismic signal processing.Jour-nal of Data Acquisition&Processing,2005,20(4):449～453
[7]刁瑞,李振春,韩文功等.基于广义S变换的吸收衰减分析技术在油气识别中的应用.石油物探,2011,50(3):260～265Diao Rui,Li Zhenchun,Han Wengong et al.Applica-tion of absorption and attenuation analysis techniquebased on generalized S transform for hydrocarbon i-dentification.GPP,2011,50(3):260～265
[8]李宏兵,赵文智,曹宏等.小波尺度域含气储层地震波衰减特征.地球物理学报,2004,47(5):892～898Li Hongbing,Zhao Wenzhi,Cao Hong et al.Charac-teristics of seismic attenuation of gas reservoirs inwavelet domain.Chinese J Geophys,2004,47(5):892～898
[9]郭栋,韩文功,王兴谋等.地层吸收特征参数分析预测深层气藏方法.油气地球物理,2008,6(3):20～24Guo Dong,Han Wengong,Wang Xingmou et al.Pre-diction deep gas pool by formation absorption charac-teristic parameter.Petroleum Geophysics,2008,6(3):20～24
[10]狄帮让,裴正林,夏吉庄等.薄互层油藏模型黏弹性波方程正演模型研究.石油地球物理勘探,2009,44(5):622～629Di Bangrang,Pei Zhenglin,Xia Jizhuang et al.For-ward simulation of viscoelastic wave equation in thin-interbeded reservoir model.OGP,2009,44(5):622～629
[11]刘兰峰,曹思远,李绪宣等.未固结含气砂岩储层低频地震响应特征研究.石油地球物理勘探,2010,45(6):873～878Liu Lanfeng,Cao Siyuan,Li Xuxuan et al.Studies onthe characteristics of frequency seismic response fromunconsolidated gas-bearing sand reservoir.OGP,2010,45(6):873～878
[12]孙成禹.地震波理论与方法.山东东营:中国石油大学出版社,2007
[13]张益明,李绪宣,符力耘.瞬时子波吸收分析技术的应用——以中国近海天然气检测为例.石油物探,2009,48(4):368～376Zhang Yiming,Li Xuxuan,Fu Liyun.Application ofinstantaneous wavelet absorption analysis technology:case study on offshore gas detection in China.GPP,2009,48(4):368～376
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