Application of Kirchhoff pre—stack migration technology in Tanghe low uplift

The Tanghe low uplift is stave, the structure is complex, the lateral velocity change is big, the signal-to -noise ratio is low, after stack imaging effect is not good, which can't satisfy the interpretation need, But for Kirchhoff pre-stack migration, the principle is simple, easy to realize, calculating efficiency is high, compatible to observation system, the output image gather is very suitable for inclined angle layer velocity analysis, and it is the effective measure for complex structure image formation. In order to investigate the regional fault distribution, the structure growth characteristic as well as the stratum contact relations, we carried on pre-stack migration to regional seismic data. In the practical application, we carried on fine pre-stack pre treatment, established reasonable displacement velocity field, optimized displacement parameter, which greatly increased the low uplift image formation precision, and has provided the high quality seismic data for this area exploration and the development and has made the obvious geological progress.