A geometrical method for migrating 3D or 2.5D seismic reflection data

摘要: Classical processing of 2.5D land seismic surveys has shown to yield unsatisfactory images, even though shot gathers show clear reflections and a good signal noise ratio. If some major interfaces are easily identified within the stack volume, their 3D geometry remains difficult appreciate because lack continuity in cross-receiver line direction. The theoretical aspects an alternate method allowing construction these structures presented here. This geometrically migrates picked reflection traveltimes on quality without amplitude or frequency considerations. It is tested synthetic dataset from smoothly deformed reflector that well recovered by technique applied survey, successful reconstruction reflectors.