多目标储层地震分时频处理技术
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摘要
鄂尔多斯盆地西南部的西峰地区存在两大套生储油目标层系,其原始地震资料的有效反射较弱,反射位置相近(小于300 ms),但能量、频率成份、波形、相位及噪声特征等均存在差异。采用多目标储层分时频处理技术,即首先分析各主要目标层段有效信号波组特征、频率成份及噪声特征;然后分时求取反褶积因子,分时频作速度分析,分时频采用不同的动、静校正,分时去噪,做分时振幅、频率补偿;最后将分时分频处理的成果合成后再作相应的叠后处理,可获得高分辨率、高信噪比剖面,能够满足后续各目标储层的地震反演及储层预测的需要。
There are two oil-bearing strata at Xifeng area in southwest Ordos Basia The reflections from the strara were weak and close in space (less than 300ms). However differences exist in energy, frequency content, waveform, phase, and noise characteristics between the reflections. Reservoir-oriented multi-time and frequency gate processing technique was adopted. Firstly analyze the characteristics of reflections and noises and determine their frequency contents. Secondly calculate deconvolution coefficient using multi-time gates, analyze velocity using multi-time and frequency gates, and implement noise removal, amplitude and frequency compensation, as well as static correction and DMO within multi-time and frequency gates. And finally combine the results and carry out post-stack processing.
There are two oil-bearing strata at Xifeng area in southwest Ordos Basia The reflections from the strara were weak and close in space (less than 300ms). However differences exist in energy, frequency content, waveform, phase, and noise characteristics between the reflections. Reservoir-oriented multi-time and frequency gate processing technique was adopted. Firstly analyze the characteristics of reflections and noises and determine their frequency contents. Secondly calculate deconvolution coefficient using multi-time gates, analyze velocity using multi-time and frequency gates, and implement noise removal, amplitude and frequency compensation, as well as static correction and DMO within multi-time and frequency gates. And finally combine the results and carry out post-stack processing.
引文
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2 王有新.复杂地表情况的动校正方案[J].石油地球物理勘探,2002,37(2) :105～108
3 朱海龙,崔远红.速度分析和层析成像[J].勘探地球物理进展,2003,26(5) :433～438
4 徐颖,郑朝平.地震资料处理技术新进展--静校正和叠加成像[J].勘探地球物理进展,2003,26(5) :439～446
5 贾丽华,吴长江,罗焱鑫,等.地震资料高分辨率处理技术[J].石油物探,2002,41(4) :484～488
6 陈茂山.测井资料的两种深度域频谱分析方法及在层序地层学研究中的应用[J].石油地球物理勘探,1999,34(1) :57～64
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