The 3-D high-resolution seismic acquisition in mountainous of the northeastern Sichuan

In order to clarify clearly the underground fracturegrew extents and the highly-steep complex structures, and improve reservoirs resolution in the northeast area of Sichuan. We summarized up a set of 3-D high-resolution seismic acquisition techniques and methods, which are suitable for the mountainous ground of that region.Aiming at the complex surface layer seismic geological conditions such as bare carbonate rocks,rivers, gravels in that region.More azimuthally fracture seismic attribute information have obtained by adopting large-patch and multi-azimuth 3-D geometry. Choose scientifically shooting depths and charges, to impedance coupling and geometry coupling in the field shooting, adopted water-shooting and array-shooting in the especial area, and ensured consistencies of shooting energy and frequency and integrity of data in all area.Reasonably chose geophone planting coupling mode and geophone array parameters by researching the rules of stratum attenuation and absorption, then improved resolution and S/N ratio. The precision of the true measured points and the attribute sameness of the geometry are ensured by making use of the high precision digital satellite map to design physical points of the ground Seismic data quality is improved evidently.