分频技术在表征牛9井区储层中的应用
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摘要
由于多个波阻抗界面产生的子波叠加效应和鸣振效应使得地震道并不能直观反映界面位置和地层组合特点,而且不同的地质目标对地震资料的不同频率成分的敏感程度不同。因此,利用地震信号的特定频率或频带信息来突出地质目标的成像效果一直是石油物探技术研究的重要内容。本文利用分频反演、小波分频成像和时频三原色等分频技术,对牛9井区的三维地震资料进行了综合研究,得到了比较清晰、合理的储层解释结果,证实了分频技术在储层预测中的有效性和实用性。
The effects of wavelet stacking and ringing arosing from many wave impedance interfaces make seismic traces impossible to reflect the interface location and the characteristics of formation combination intuitionally,and different geological objects have different sensitivities to different frequency components of seismic data.Therefore,using a given frequency to outstand the imaging effect of geological objects is always the primary content of geophysical studies.Through frequency-divided inversion,wavelet frequency-divided imaging and time-frequency three primary colors,the 3D seismic data of Niu 9 well field is synthetically studied,and a clear and reasonable result which can be used to interpret reservoirs is obtained,so the frequency-divided technique is approved to be an effective means to predict reservoirs.
The effects of wavelet stacking and ringing arosing from many wave impedance interfaces make seismic traces impossible to reflect the interface location and the characteristics of formation combination intuitionally,and different geological objects have different sensitivities to different frequency components of seismic data.Therefore,using a given frequency to outstand the imaging effect of geological objects is always the primary content of geophysical studies.Through frequency-divided inversion,wavelet frequency-divided imaging and time-frequency three primary colors,the 3D seismic data of Niu 9 well field is synthetically studied,and a clear and reasonable result which can be used to interpret reservoirs is obtained,so the frequency-divided technique is approved to be an effective means to predict reservoirs.
引文
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[3]王云高,周夏丽,于湘海,等.多目标储层地震分时频处理技术[J].勘探地球物理进展,2004,27(4):274～279.
[4]姜秀清,江洁,高平,等.地震属性分析技术在不同油气藏中的应用[J].石油物探,2004,43(增刊):70～72.
[5]胡光义,王加瑞,武士尧.利用地震分频处理技术预测河流相储层[J].中国海上油气,2005,17(4):237～241.
[6]王西文,刘全新,赵应成,等.小波域的波阻抗反演方法[J].石油地球物理勘探,2000,35(1):89～96.
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