Seismic Survey Test in Ultra-deep Craton Basin in Mesoproterozoic and Neoproterozoic in Tarim Basin

摘要

Tarim basin is one big stack basin with oil and gas. Craton basin in Mesoproterozoic and Neoproterozoic is located at the bottom of Tarim basin, and its buried depth is more than 7000m. As for the craton basin, the absorption and attenuation of seismic wave energy is big, S/N of seismic data is low, the basin structure is not clear, so petroleum exploration risk is big. We have used the geometry with ultra-long spread, multi-line and high fold and the data processing with low frequency protected to overcome energy attenuation and improve the S/N of seismic data from ultra-deep strata in craton basin in Mesoprotozoic-Neoprotozoic. This paper analyzes and evaluates the effects about geometry spread length, fold and the data processing with low frequency protected.