Abstract：In decovolution testing, it is difficult to directly determine deconvolution parameters due to data quality. Generally the deconvolution parameters are defined on stacking sections, deconvolution results are affected by wavelet compression rate by deconvolution, the non in-phase phenomenon which is caused by static error and non in-phase stacking which is caused by poor quality velocity analysis, thus deconvolution results were affected by many factors. The objective to use turn-back seismic data processing workflow is to remove the affects which the remnant factors applied to deconvolution, and to clarify the function for every parameters used in deconvolution. The workflow includes the following steps:(1)With large predictive step conducting single trace deconvolution on field static corrected CMP gathers.(2)Conducting velocity analysis and stacking.(3)Running pickup, decomposition and application for residual static correction.(4)Based on the data after step (1) to (3) conducting one more round of velocity analysis, and applying residual static values to CMP gathers for further deconvolution testing.(5)Applying best velocity to conduct normal moveout correction, to obtaining deconvolution sections, and at last based on the deconvolution sections to determining deconvolution parameters. After applying turn-back seismic data processing workflow, the deconvolution results are only affected by single factor, as a result the workflow is beneficial to determining deconvolution parameters and to protecting signals, and it paves the way for further processing, especially for iteration processing in normal moveout correction and static correction.
