A realization method of space-domain datum satisfying the statics min-principle
Kuang Jun, Zheng Hongming, Hongjie Liu, Liu Yiwen, Jiang Yuangang · 2014
Seismic data processing and interpretation would involve datum, and different datums have different impacts on the results. The datum defined on the conventional static correction method can satisfy the requirements of seismic data processing, but still has some deficiencies, such as time-depth conversion of the datum and, the error of smooth surface and CMP reference surface, etc. This paper presents a method of back-calculation datum by using known surface structure parameters. The method not only can make statics correction meet min-principle but also make each CMP gathers possess their own horizontal datum, and gives precise elevation for datum. Satisfying seismic data processing requirements, it also provides a profile interpretation and an elevation datum of structure-depth conversion for comprehensive research, and avoids the conversion error of CMP reference surface at time-domain. Theoretical model tests prove that the accuracy of profile structure in depth domain obtained by this approach is obviously improved compared with the conventional datum method, so as to provide a powerful mean for the low-amplitude structure exploration.