储层目标地震资料保真处理新技术
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摘要
利用地震资料研究储层物性不但要求提高分辩率,还要提高讯号的保真度.然而常规地震资料处理技术中用多重反褶积来展宽记录频谱,又用带通滤波来提高信噪比,其结果往往使地震记录失去某些反射特征.因此讯号保真应当成为地震资料处理的主要目标之一.本文推出的自动滤波技术和自动频率补偿技术就是为了改进过去的滤波和反褶积技术所采取的新措施.它既能提高分辩率和信噪比,又能保持原始信息的真实性不受损失.
To study reservoir petrophysics by using seismic data does not only require the improvement of resolution, but also the improvement of fidelity of seismic data. However, the conventional seismic processing technique with the use of multiple deconvolution to extend frequency spectrum of records and with the use of band-pass filter to enhance S/N ratio usually results in the loss of reflective features of seismic records. Therefore signal fidelity should become one of the major objectives in seismic data processing. The automatic filter and automatic frequency compensation techniques introduced by this paper are just for improving the conventional filter and deconvolution methods. These techniques will not only improve the resolution and S/N ratio, but also reserve the fidelity of original data.
To study reservoir petrophysics by using seismic data does not only require the improvement of resolution, but also the improvement of fidelity of seismic data. However, the conventional seismic processing technique with the use of multiple deconvolution to extend frequency spectrum of records and with the use of band-pass filter to enhance S/N ratio usually results in the loss of reflective features of seismic records. Therefore signal fidelity should become one of the major objectives in seismic data processing. The automatic filter and automatic frequency compensation techniques introduced by this paper are just for improving the conventional filter and deconvolution methods. These techniques will not only improve the resolution and S/N ratio, but also reserve the fidelity of original data.
引文
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