Well-control seismic data processing and its application in LS area

The strata and lithological traps of Devonian and Silurian are the exploration targets in LS area, Tarim Basin．However, the traps were poorly located due to the resolution limitation of seismic data．Therefore, VSP well control seismic data processing was investigated and applied for improving resolution in LS area．By using VSP data，spherical spreading amplitude compensation factor was estimated．Matching analysis was carried out on the VSP corridor stack profiles and the seismic data to obtain optimum processing parameters for deconvolution. Time variant Q was calculated by analyzing zero-offset VSP data. Moreover, spatial-time variant Q analysis was applied in seismic data and the VSP data was used to correct it to get time variant Q compensation factor. The resolution of data after processed by well driven technology has been greatly improved and the sandstone pinch-out points and Silurian internal episode were described more accurately.