高密度各向异性速度分析技术及应用

常规的NMO技术是在假设地层各向同性的前提下提出来的,而真实的地层却是各向异性的,如果用常规的NMO技术进行地震数据的处理势必会影响数据的成像质量。近些年来随着海上地震采集技术的不断发展,电缆长度不断增加,使得地层各向异性的影响更加突出。本文对不同海域大偏移距地震数据进行了高密度各向异性速度分析技术的应用,从对比该技术与常规NMO技术得出的道集和叠加剖面上看,该技术获得了更好的效果,从而论证了高密度各向异性速度分析技术能够较好地解决地层各向异性带来的问题。

High Density of Anisotropic Velocity Analysis Technology and Application

The conventional NMO technology is proposed under the premise of hypothesizing that the formation is isotropic, but the real formation is anisotropic. The conventional NMO technolo- gy for the processing of seismic data is bound to affect the image quality of the data. In recent years, with the increasing development of the marine seismic acquisition technology, the length of the cable is increasing, which makes the effects of the anisotropic formation more obvious. This paper applies high density of anisotropie velocity analysis technology to large offset seismic data of different sea areas. From comparing the gathers and overlay profile produced by this technique and conventional NMO technology, the technology achieves better results, which demonstrates that the high density of anisotropic velocity analysis technology can solve the problems brought by the anisotropic formation better.