| 摘要 |
Methods and systems for constraining surface consistent amplitude corrections are described. An amplitude map generated from pre-stack or post-stack 5 seismic data can constrain, through the bin term, the surface consistent inversion. The methods and systems provide a solution to correct for wavelength and regional anomalies associated with heterogeneous near surface or buried velocity variations above the target horizon. The methods and systems can be used for 2D, 3D, 4D surveys or for a merge of different surveys. Figure 11 1,,-1 102 Computing a first surface consistent amplitude correction flow based on a predetermined time window, bracketing a predetermined target, and generating a first set of surface consistent source and receiver scalars Generating a first stack of corrected trace data by applying said first set of surface consistent source and receiver scalars to said seismic trace data -1106 Generating a first amplitude map, associated with said predetermined time window and based on said first stack of corrected trace data, for constraining a second surface consistent amplitude correction -- 1108 Computing said second surface consistent amplitude correction flow, based on said time window, said first amplitude map and a bin term, and generating a second set of surface consistent source and receiver scalars "1110 Generating a second stack of corrected trace data by applying said second set of surface consistent source and receiver scalars to said seismic trace data |
