СПОСОБ ОБРАБОТКИ СЕЙСМИЧЕСКИХ ДАННЫХ ДЛЯ ПОВЫШЕНИЯ ПРОСТРАНСТВЕННОГО РАЗРЕШЕНИЯ

摘要

Temporal and/or spatial frequencies of spatially and digitally sampled 2-D or 3-D seismic data above the Nyquist frequency are preserved in full time migration of partial time migration (DMO) of 2-D and 3-D are preserved. Use is made of the fact that migration operators applied to input seismic data produce an output that need not correspond to prespecified temporal or spatial sampling values, and for sufficiently long migration operators, gives substantially uniform sampling at higher rates than the spatial and temporal Nyquist frequencies. Exact values of the partial migrated outputs are accumulated in an output buffer prior to combining them to give a migrated output with high temporal and/or spatial frequencies preserved.