白庙气田沙三段地震频谱衰减特征与含气性检测
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摘要
以东濮凹陷南部兰聊断裂下降盘的白庙气田沙三段砂砾岩水下扇体为例,根据优选出的气层、水层和干层在测井资料和地震属性分析中的响应特征,通过反复试验,选取合理的时窗值及子波同态谱(Cepstral谱),采用基于模型的参量法估算地震波频谱衰减特征,开展地层含气性预测研究。结果表明,当时窗值选择100 ms,Cepstral延迟值为10时,地震波形稳定,而且分辨率高,含气砂体在地震中出现中高频衰减现象。与实钻成果对比发现,反演预测与钻井吻合率为82.4%。
Based on the responses of optimized gas zone,water zone and dry znoe in logging data and seismic attributes,gas-bearing detection on the glutenite subaqueous fan in the third section of Shahejie Formation in Baimiao Gas Field,which is located in the footwall of Lanliao Fault Zone,Dongpu Depression,is carried out through the selection of appropriate time-window length and wavelet spectra(Cepstral spectra) after experiments and through using the parameter method based on a model to estimate the characteristics of seismic frequency spectrum attenuation.The study results show that the seismic wave is stable and indicates a high resolution,and that the high frequency attenuation presents in seismic operation for gas-bearing sandbody,when the time-window length is 100 ms and the lag of Cepstral spectrum is 10.Meanwhile,the results also show that the agreement rate of inversion prediction and drilling is 82.4% according to the drilled wells.
Based on the responses of optimized gas zone,water zone and dry znoe in logging data and seismic attributes,gas-bearing detection on the glutenite subaqueous fan in the third section of Shahejie Formation in Baimiao Gas Field,which is located in the footwall of Lanliao Fault Zone,Dongpu Depression,is carried out through the selection of appropriate time-window length and wavelet spectra(Cepstral spectra) after experiments and through using the parameter method based on a model to estimate the characteristics of seismic frequency spectrum attenuation.The study results show that the seismic wave is stable and indicates a high resolution,and that the high frequency attenuation presents in seismic operation for gas-bearing sandbody,when the time-window length is 100 ms and the lag of Cepstral spectrum is 10.Meanwhile,the results also show that the agreement rate of inversion prediction and drilling is 82.4% according to the drilled wells.
引文
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[13]边树涛,董艳蕾,郑浚茂.地震波频谱衰减检测天然气技术应用研究[J].石油地球物理勘探,2007,42(3):296-300.Bian Shutao,Dong Yanlei,Zheng Junmao.Study on application ofseismic frequency spectrum attenuation to detect natural gas[J].OilGeophysical Prospecting,2007,42(3):296-300.
[14]Luis C Ramtrez-Cruz,Raul del Valle-Garcta,Jaime Urrutia Fucugauchi.Enhanced oil production in mature field assisted by spectra attenuationanalysis[J].Journal of Geophysics and Engineering,2005,2(1):48-50.
[2]Mitchell J T,Derzhi N,Lichma E,et al.Energy absorption analysis:Acase study[C].Denver:Society of Exploration Geophysicists,1996.
[3]廖林,陈汉林,牛佳文.文昌A凹陷某气藏非弹性效应与含气性检测[J].石油物探,2007,46(2):166-169.Liao Lin,Chen Hanlin,Niu Jiawen.Seismic inelasticity effect of thegas reservoirs and prediction in the Wenchang A Sag[J].GeophysicalProspecting for Petroleum,2007,46(2):166-169.
[4]王东,张海澜,王秀明.部分饱和孔隙岩石中声波传播数值研究[J].地球物理学报,2006,49(2):524-532.Wang Dong,Zhang Hailan,Wang Xiuming.A numerical study ofacoustic wave propagation in partially saturated prelatic rock[J].Chinese Journal of Geophysics,2006,49(2):524-532.
[5]席道瑛,刘斌,程经毅,等.干燥和饱和岩石的衰减与频散特性[J].物探化探计算技术,1997,19(1):19-22.Xi Daoying,Liu Bin,Cheng Jingyi,et al.The attenuation anddispersion of dry and saturated rocks[J].Computing Techniques forGeophysical and Geochemical Exploration,1997,19(1):19-22.
[6]黄凯,徐群洲,杨晓海,等.地震波能量的衰减及其影响因素[J].新疆石油地质,1997,18(3):212-216.Huang Kai,Xu Qunzhou,Yang Xiaohai,et al.Attenuation of seismicwave energy and its constraints[J].Xinjiang Petroleum Geology,1997,18(3):212-216.
[7]边树涛,狄帮让,董艳蕾,等.地质统计反演在东濮凹陷白庙气田沙三段储层预测中的应用[J].石油地球物理勘探,2010,45(3):398-405.Bian Shutao,Di Bangrang,Dong Yanlei,et al.Application ofgeostatistical inversion in reservoir prediction in the third member ofShahejie Formation,Baimiao Gas Field,Dongpu Depression[J].OilGeophysical Prospecting,2010,45(3):398-405.
[8]刘企英.用频谱比法提取衰减吸收信息[J].石油地球物理勘探,1987,22(5):529-544.Liu Qiying.The extract of absorption information using frequencyspectrum ratio method[J].Oil Geophysical Prospecting,1987,22(5):529-544.
[9]黄中玉,王于静,苏永昌.一种新的地震波衰减分析方法:预测油气异常的有效工具[J].石油地球物理勘探,2000,35(6):768-773.Huang Zhongyu,Wang Yujing,Su Yongchang.A new analysis methodfor seismic wave attenuation effective tool for predicting hydrocarbonabnormaly[J].Oil Geophysical Prospecting,2000,35(6):768-773.
[10]刘喜武,年静波,刘洪.基于广义S变换的地震波能量衰减分析[J].勘探地球物理进展,2006,29(1):20-24.Liu Xiwu,Nian Jingbo,Liu Hong.Generalized S-transform based onseismic attenuation analysis[J].Progress in Exploration Geophysics,2006,29(1):20-24.
[11]陈文超,高静怀.基于改进的最佳匹配地震子波的地震资料衰减特性分析[J].地球物理学报,2007,50(3):837-843.Chen Wenchao,Gao Jinghuai.Characteristic analysis of seismicattenuation using MBMSW wavelets[J].Chinese Journal ofGeophysics,2007,50(3):837-843.
[12]张勇,宋维琪.基于储集层地质模式用多种地震属性参数预测砂体含油气性[J].石油勘探与开发,2001,28(4):60-63.Zhang Yong,Song Weiqi.Predicting the oil/gas bearing potential ofsand bodies with various seismic attribute parameters based ongeological model of the reservoirs[J].Petroleum Exploration andDevelopment,2001,28(4):60-63.
[13]边树涛,董艳蕾,郑浚茂.地震波频谱衰减检测天然气技术应用研究[J].石油地球物理勘探,2007,42(3):296-300.Bian Shutao,Dong Yanlei,Zheng Junmao.Study on application ofseismic frequency spectrum attenuation to detect natural gas[J].OilGeophysical Prospecting,2007,42(3):296-300.
[14]Luis C Ramtrez-Cruz,Raul del Valle-Garcta,Jaime Urrutia Fucugauchi.Enhanced oil production in mature field assisted by spectra attenuationanalysis[J].Journal of Geophysics and Engineering,2005,2(1):48-50.
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