改进Stockwell变换法识别碳酸盐岩溶洞——以鄂尔多斯盆地奥陶系溶洞发育段为例
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
鄂尔多斯盆地奥陶系碳酸盐岩比较发育,主要储集空间为溶蚀孔洞,但其尺度较小,因地震数据分辨率较低,直接利用地震资料预测溶蚀孔洞发育段比较困难。首先对Stockwell变换(S变换)引入调节因子,使高斯窗随频率的变化减慢,从而提高S变换时频谱的时间分辨率。在此基础上,对改进S变换时频谱进行子波谱拟合,得到聚集性更好的时频谱,从中提取地层吸收属性剖面,对碳酸盐岩溶蚀洞穴进行预测。通过实际资料的处理分析结果看出,对改进S变换的时频谱进行子波谱拟合后,不论是左斜率还是右斜率法,均能获取稳定的吸收属性剖面,而且都能够清晰地刻画出溶洞发育段的位置。
Ordovician carbonate is relatively developed in Ordos Basin,and its main reservoir space is corrosion caves.However,due to the small size of caves,it is difficult to predict the corrosion zone using the seismic data with low resolution.In this study,a conditioning factor was introduced into Stockwell transform(S-transform)to reduce the variation of Gaussian window with frequency,thus enhancing the temporal resolution of time-frequency spectrum.On this basis,wavelet spectrum fitting was performed on modified S-transform time-frequency spectra to achieve better focusing.Then the stratum absorption attributes profile was extracted to predict the carbonate corrosion caves.Actual data processing and analyzing results indicate that stable absorption attribute profiles can be obtained after wavelet spectrum fitting with the use of left-gradient or right-gradient method,clearly demonstrating the location of corrosion caves.
引文
[1]付金华,魏新善,任军峰,等.鄂尔多斯盆地天然气勘探形势与发展前景[J].石油学报,2006,27(6):1-4.Fu Jinhua,Wei Xinshan,Ren Junfeng,et al.Gas exploration and developing prospect in Ordos Basin[J].Acta Petrolei Sinica,2006,27(6):1-4.
    [2]赵惊涛,李明,张研.基于绕射波的储层预测方法及其应用[J].石油学报,2014,35(5):901-907.Zhao Jingtao,Li Ming,Zhang Yan.Development and application of an effective method for reservoir predication based on seismic diffraction[J].Acta Petrolei Sinica,2014,35(5):901-907.
    [3]辛可锋,李振春,王永刚,等.地层等效吸收系数反演[J].石油物探,2001,40(4):14-20.Xin Kefeng,Li Zhenchun,Wang Yonggang,et al.Formation equivalent absorption coefficient inversion[J].Geophysical Prospecting for Petroleum,2001,40(4):14-20.
    [4]孙成禹.谱模拟方法及其在提高地震资料分辨率中的应用[J].石油地球物理勘探,2000,35(1):28-34.Sun Chengyu.Spectrum modeling method and its application to seismic resolution improvement[J].Oil Geophysical Prospecting,2000,35(1):28-34.
    [5]Bath M.Spectral analysis in geophysics[M].New York:Elsevier,1974.
    [6]Quan Youli,Harrisy J.Seismic attenuation tomography using the frequency shift method[J].Geophysics,1997,62(3):895-905.
    [7]孙勤华,张虎权,代冬冬,等.基于地震子波衰减谱的碳酸盐岩烃类检测方法[J].石油学报,2013,34(3):502-506.Sun Qinhua,Zhang Huquan,Dai Dongdong,et al.Hydrocarbon detection of carbonate reservoirs based on seismic wavelet attenuation spectrum[J].Acta Petrolei Sinica,2013,34(3):502-506.
    [8]贾爱林,闫海军.不同类型典型碳酸盐岩气藏开发面临问题与对策[J].石油学报,2014,35(3):519-527.Jia Ailin,Yan Haijun.Problems and countermeasures for various types of typical carbonate gas reservoirs development[J].Acta Petrolei Sinica,2014,35(3):519-527.
    [9]杨华,付金华,魏新善,等.鄂尔多斯盆地奥陶系海相碳酸盐岩天然气勘探领域[J].石油学报,2011,32(5):733-740.Yang Hua,Fu Jinhua,Wei Xinshan,et al.Natural gas exploration domains in Ordovician marine carbonates,Ordos Basin[J].Acta Petrolei Sinica,2011,32(5):733-740.
    [10]姚清洲,孟祥霞,张虎权,等.地震趋势异常识别技术及其在碳酸盐岩缝洞型储层预测中的应用:以塔里木盆地英买2井区为例[J].石油学报,2013,34(1):101-106.Yao Qingzhou,Meng Xiangxia,Zhang Huquan,et al.Principles and application of a seismic trend anomaly diagnostic technique:a case study on carbonate fractured-cavity reservoirs in Yingmai 2area,Tarim Basin[J].Acta Petrolei Sinica,2013,34(1):101-106.
    [11]付金华,白海峰,孙六一,等.鄂尔多斯盆地奥陶系碳酸盐岩储集体类型及特征[J].石油学报,2012,33(增刊2):110-117.Fu Jinhua,Bai Haifeng,Sun Liuyi,et al.Types and characteristics of the Ordovician carbonate reservoirs in Ordos Basin,China[J].Acta Petrolei Sinica,2012,33(Supplement2):110-117.
    [12]Stockwell R G,Mansinha L,Lowe R P.Localization of the complex spectrum:the S transform[J].IEEE Transactions on Signal Processing,1996,44(4):998-1001.
    [13]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[J].地球物理学报,2003,46(4):526-532.Gao Jinghuai,Chen Wenchao,Li Youming,et al.Generalized S transform and seismic response analysis of thin interbeds[J].Chinese Journal of Geophysics,2003,46(4):526-532.
    [14]陈学华,贺振华.改进S变换及在地震信号处理中的应用[J].数据采集与处理,2005,20(4):449-453.Chen Xuehua,He Zhenhua.Improved S-transform and its application in seismic signal processing[J].Journal of Data Acquisition&Processing,2005,20(4):449-453.
    [15]刘兰峰,刘全新,雍学善,等.基于广义S变换的低频瞬时能量谱油气检测技术[J].天然气地球科学,2005,16(2):238-241.Liu Lanfeng,Liu Quanxin,Yong Xueshan,et al.Hydrocarbon detection using instaneous energy spectrum of low frequency based on general S transform[J].Natural Gas Geoscience,2005,16(2):238-241.
    [16]Pinnegar C R,Mansinha L.The S transform with windows of arbitrary and varying shape[J].Geophysics,2003,68(1):381-385.
    [17]刘喜武,刘洪,李幼铭,等.基于广义S变换研究地震地层特征[J].地球物理学进展,2006,21(2):440-451.Liu Xiwu,Liu Hong,Li Youming,et al.Study on characteristics of seismic stratigraphy by generalized S transform[J].Progress in Geophysics,2006,21(2):440-451.
    [18]Rosa A L R,Ulrych T J.Processing via spectral modeling[J].Geophysics,1991,56(8):1244-1251.
    [19]李鲲鹏,李衍达,张学工,等.基于谱模拟技术的混合相位地震子波估计方法[J].石油物探,2001,40(1):21-28.Li Kunpeng,Li Yanda,Zhang Xuegong,et al.The mixed-phase wavelet estimate method based on spectral modeling[J].Geophysical Prospecting for Petroleum,2001,40(1):21-28.
    [20]赵波,俞寿朋,聂勋碧,等.谱模拟法反褶积方法及其应用[J].石油地球物理勘探,1996,31(1):101-110.Zhao Bo,Yu Shoupeng,Nie Xunbi,et al.Spectral-modeled deconvolution and its application[J].Oil Geophysical Prospecting,1996,31(1):101-110.
    [21]魏文,李红梅,穆玉庆,等.中心频率法估算地层吸收参数[J].石油地球物理勘探,2012,47(5):735-739.Wei Wen,Li Hongmei,Mu Yuqing,et al.Estimation of stratigraphic absorption parameter based on center frequency method[J].Oil Geophysical Prospecting,2012,47(5):735-739.
    [22]付勋勋,徐峰,秦启荣,等.基于改进的广义S变换求取地层品质因子Q值[J].石油地球物理勘探,2012,47(3):457-461.Fu Xunxun,Xu Feng,Qin Qirong,et al.Estimation of quality factor based on improved generalized S-transform[J].Oil Geophysical Prospecting,2012,47(3):457-461.
    [23]王海洋,孙赞东,Chapman M.岩石中波传播速度频散与衰减[J].石油学报,2012,33(2):332-341.Wang Haiyang,Sun Zandong,Chapman M.Velocity dispersion and attenuation of seismic wave propagation in rocks[J].Acta Petrolei Sinica,2012,33(2):332-341.
    [24]Lichman E,Goloshubin G.Unified approach to gas and fluid detection on instantaneous seismic wavelets[M]∥SEG.SEG Technical Program Expanded Abstracts 2003,Tulsa:Society of Exploration Geophysicists,2003:1699-1702.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心