3D seismic data reverse-time migration in Songzhan survey in North Songliao Basin

摘要

Seismic data reverse-time migration is an algorithm which is developed based on two-way wave equation. The tight glutenite in the deep of north Songliao basin is the major field of gas exploration, which is affected by the shield effect of overlying igneous rock formation and the complex geological structure, it makes the seismic wavefield characterization of Songzhan survey complicated. After we complete the amplitude-preserved preprocessing and velocity modeling of 3-D seismic data in Songzhan survey, we apply reverse-time migration method of the GeoEast Lightning software to complete the reverse-time migration processing of Songzhan survey. Compared with the past pre-stack depth migration of Kirchhoff integral method, the imaging effect has been obviously improved. The imaging data can be used for subsequent structure interpretation, attribute analysis, and comprehensive geological study. The imaging processing of this method can be popularized and applied for daqing exploration area.