三维地震资料的全三维处理方法及其在江苏地区的应用

Full 3-D processing technique for 3-D seismic data and its application in Jiangsu prospect

王勇，秦顺亭．三维地震资料的全三维处理方法及其在江苏地区的应用．石油地球物理勘探，1997，32（6）：857～864以往江苏油田对三线地震资料的处理，没有采用全三维处理方法（部分处理过程使用二维方法处理），致使三维地震资料处理的效果不理想为此，我们研究了一套三维地震资料的全三维处理方法软件，主要包括三维地震数据预处理、二维速度分析和三维动校正、三维剩余静校正、三维频率波数域DMO、叠后地震资料τ-p域道间插值和三维波动方程频率空间域一步法偏移。将这套方法用于该区复杂地质构造地区的三维地震资料处理，明显地提高了三维地震资料的处理精度和剖面的信噪比。

Full 3-D processing technique was not applied to 3-D seismic data in Jiangsu prospect (Partial processing procedure was finished by using 2-D processing tech-nique),so that the processing effect of 3-D seismic data was not good. To improve the processing effect, we have developed the full 3-D processing technique for 3-D seismic data. The technique includes some parts,namely, preprocesslng of 3-D seis-mic data, 3-D velocity analysis, 3-D normal moveout correction, 3-D residual static correction, 3-D DMo in frequency-wavenumber domaln, poststack intertrace 1nter-polation in T-p domain, 3-D wave equation one-pass migration in frequency-space domain. The processing technique has been applied to the 3-D seismic data from thearea where geology structure is very complicated, and it obviously improves the processing accuracy and signal/noise ratio of 3-D selsmic section.