分频技术在塔中地区地震储层边界刻画中的应用
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摘要
为了减少甚至排除时间域内不同频率成份的相互干扰,将基于短时窗离散傅氏变换或基于Z变换的最大熵谱方法的分频技术应用于塔中某区地震属性分析中,以获取高于传统频谱分析分辨率的解释结果,提高地震储层边界的刻画精度。实测数据分析表明,由分频算法所得到的目的层时-频切片相比于传统的地震属性,其频带界限(对应于能量体的分布或调谐厚度的变化)更清晰,更有利于地震储层的边界刻画及分布预测。
In order to reduce or even eliminate the mutual interference of different frequency in the time domain,the spectral decomposition technology based on windowed shorted-time Fourier transform or maximum entropy method of Z-transform can be applied to the seismic attribute analysis in the research area.By using this technique,the higher resolution than the result from the tradition spectral analysis is obtained and the seismic reservoir prediction effect is improved.The time-frequency slice of the target area acquired by the time-frequency algorithm shows more details,and it is easier to distinguish the boundary of the frequency band corresponding to the energy map or turning thickness,therefore,it is more beneficial to predict the reservoir and outline its distribution,compared to conventional seismic attributes.
In order to reduce or even eliminate the mutual interference of different frequency in the time domain,the spectral decomposition technology based on windowed shorted-time Fourier transform or maximum entropy method of Z-transform can be applied to the seismic attribute analysis in the research area.By using this technique,the higher resolution than the result from the tradition spectral analysis is obtained and the seismic reservoir prediction effect is improved.The time-frequency slice of the target area acquired by the time-frequency algorithm shows more details,and it is easier to distinguish the boundary of the frequency band corresponding to the energy map or turning thickness,therefore,it is more beneficial to predict the reservoir and outline its distribution,compared to conventional seismic attributes.
引文
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[15]赵宗举,李宇平,吴兴宁,等.塔里木盆地塔中地区奥陶系特大型岩性油气藏成藏条件及勘探潜力[J].中国石油勘探,2004,9(5):12-20.ZHAO Zongju,LI Yuping,WU Xingning,et al.Conditions for migration and accumulation of Ordovician giant lithologic oil and gas reservoirs in Tazhong region and exploration potential[J].ChinaPetroleum Exploration,2004,9(5):12-20.
[16]金兴,林年添,柴辉婵,等.地震数据源的选择对于溶洞有效识别的效果分析[J].山东科技大学学报:自然科学版,2010,29(1):29-31.JIN Xing,LIN Niantian,CHAI Huichan,et al.Analysis of effect of identifying karst caves with different seismic source data[J].Journal of Shandong University of Science and Technology:Natural Sciences,2010,29(1):29-31.
[2]MARPLE S L.Frequency resolution of Fourier and maximum entropy spectral estimates[J].Geophysics,1982,47(9):1303-1307.
[3]ROBERTSON J D,NOGAMI H A.Complex seismic trace analysis of thin beds[J].Geophysics,1984,49(4):344-352.
[4]张江华,林承焰,于彦,等.分频解释技术在岩性储层描述中的应用[J].煤田地质与勘探,2008,36(5):70-76.ZHANG Jianghua,LIN Chengyan,YU Yan,et al.Application of frequency-shared interpretation technique for lithology res-ervoir description[J].Coal Geology&Exploration,2008,36(5):70-76.
[5]PARTYKA G,GRIDLEY J,LOPEZ J.Interpretational application of spectral decomposition in reservoir characterization[J].The Leading Edge,1999,18(3):353-360.
[6]朱庆荣,张越迁,于兴河,等.分频解释技术在表征储层中的运用[J].矿物岩石,2003,23(3):104-108.ZHU Qingrong,ZHANG Yueqian,YU Xinghe,et al.Application of spectra decomposition to reservoir characterization[J].Journal of Mineralogy and Petrology,2003,23(3):104-108.
[7]柏冠军,吴汉宁,赵希刚,等.地震资料预测薄层厚度方法研究与应用[J].地球物理学进展,2006,21(2):554-558.BAI Guanjun,WU Hanning,ZHAO Xigang,et al.Research on prediction of thin bed thickness using seismic data and its ap-plication[J].Progress in Geophysics,2006,21(2):554-558.
[8]常少英,苏丕坡,马红霞,等.TB地区分频成像解释技术研究与应用[J].岩性油气藏,2010,22(S):66-68.CHANG Shaoying,SU Peibo,MA Hongxia,et al.Research and application of frequency division imaging interpretation tech-nology in TB area[J].Lithologic Reservoirs,2010,22(S):66-68.
[9]龚洪林,王振卿,李录明,等.应用地震分频技术预测碳酸盐岩储层[J].地球物理学进展,2008,23(1):129-135.GONG Honglin,WANG Zhenqing,Li Luming,et al.Predicting carbonate reservoir by applying seismic spectral decomposi-tion technique[J].Progress in Geophysics,2008,23(1):129-135.
[10]王西文.提取地震信号高频信息的方法的若干问题[J].石油地球物理勘探,2006,41(1):67-75.WANG Xiwen.Several issues of methods for detecting high-frequency information of seismic signal[J].Oil Geophysical Prospecting,2006,41(1):67-75.
[11]吴钦宝,陈同俊,陈凤云.中国东部煤矿深部开采中的地质勘探技术[J].地球物理学进展,2005,20(2):370-373.WU Qinbao,CHEN Tongjun,CHEN Fengyun.Geological exploration techniques used in deep coal mining in China[J].Progress in Geophysics,2005,20(2):370-373.
[12]毕俊凤,刘书会,陈学国,等.分频解释技术在桩106地区馆上段河道砂体描述中的应用[J].油气地质与采收率,2003,10(5):38-40.BI Junfeng,LIU Shuhui,CHEN Xueguo,et al.The application of frequency-shared interpretation technique to channelsandbody description in upper Ng of Zhuang106area[J].Petroleum Geology and Recovery Efficiency,2003,10(5):38-40.
[13]贾承造,孙龙德,周新源,等.塔里木盆地中新生代构造特征与油气[M].石油工业出版社,2004:1-11.
[14]王志刚.塔里木盆地塔中地区奥陶系碳酸盐岩缝洞系统预测技术[D].北京:中国地质大学,2007.
[15]赵宗举,李宇平,吴兴宁,等.塔里木盆地塔中地区奥陶系特大型岩性油气藏成藏条件及勘探潜力[J].中国石油勘探,2004,9(5):12-20.ZHAO Zongju,LI Yuping,WU Xingning,et al.Conditions for migration and accumulation of Ordovician giant lithologic oil and gas reservoirs in Tazhong region and exploration potential[J].ChinaPetroleum Exploration,2004,9(5):12-20.
[16]金兴,林年添,柴辉婵,等.地震数据源的选择对于溶洞有效识别的效果分析[J].山东科技大学学报:自然科学版,2010,29(1):29-31.JIN Xing,LIN Niantian,CHAI Huichan,et al.Analysis of effect of identifying karst caves with different seismic source data[J].Journal of Shandong University of Science and Technology:Natural Sciences,2010,29(1):29-31.
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