A STUDY OF SPATIAL DIFFERENCE CORRECTION FOR TIME-LAPSE SEISMIC DATA
LI Jing-ye1,2, ZHANG Lian-qun2, CHEN Xiao-hong1,2
1. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China;
2. Geophysical Prospecting Key Laboratory of CNPC, China University of Petroleum, Beijing 102249, China
Abstract：Time-lapse seismic reservoir monitoring technology is one of the most important technologies that can determine the distribution of residual oil directly. Spatial difference correction for time-lapse seismic data was studied in this paper, aiming at solving the difficulties in the demand and application of time-lapse seismic reservoir monitoring technique in China. Spatial position difference for the same reflection point in different migrated sections caused by the differences in geometry and acquisition orientation results in unreasonable time-lapse seismic data difference, which increases the difficulty and risk of time-lapse seismic interpretation processing parameters. The optimal shifts in x, y and time directions are calculated by 3D cross-correlation between local data volumes from reference data and monitor data. And then the spatial position difference correction can be conducted for monitor seismic data. The comparison and analysis of real time-lapse seismic data indicate that time-lapse seismic spatial difference correction is effective in decreasing 3D nonlinear spatial difference of purposeless repeated acquisition time-lapse seismic data.
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