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3D VSP地震数据具有高分辨率和高信噪比的特点,常规的VSP成像方法在大庆油田资料的处理中一直未见到理想的效果.依据大庆油田VSP资料的特点,设计了3D VSP资料的处理流程,主要包括三分量波场逐点定向方法和Q补偿的子波反褶积等预处理方法,所设计的流程具有高分辨率、高保真性的特点.大庆油田M1井的实际资料处理结果显示,所形成的方法可将VSP资料的频带展宽约20 Hz,同时对地面地震也进行了反褶积处理,反褶积后,地面地震的分辨率得到有效提高,波组特征更加清楚.实际数据计算表明,所形成的方法具有很好的实用性,可实现地下介质的精细刻画,可在具有同类地质条件的研究区推广应用.
The 3D VSP seismic data has the characteristics of high resolution and high signal-to-noise ratio, and the conventional VSP imaging method has not been able to achieve satisfactory results in the processing of Daqing oilfield data.According to the characteristics of VSP data in Daqing Oilfield, 3D VSP data is designed The processing flow mainly includes preprocessing methods such as three-component wavefield point-by-point directional method and Q-compensated wavelet deconvolution. The designed flow has the characteristics of high resolution and high fidelity. The actual data processing results of well M1 in Daqing Oilfield The results show that the proposed method can broaden the frequency band of VSP data by about 20 Hz and deconvacate the ground-based earthquakes. After deconvolution, the resolution of ground-based earthquakes is effectively enhanced and the characteristics of the group of waves are clearer. The data calculation shows that the method has good practicability and can finely depict the underground medium, which can be applied in the study area with similar geological conditions.