Seismic Inverse Q Filtering for Carbonate Reservoir Characterization

Abstract

The Ordovician fractured-vuggy carbonate reservoirs in China’s Tarim Basin are characterized by ultra-deep burial (>5000 m) and significant vertical-lateral heterogeneity. Such geological complexity severely degrades seismic data quality, manifesting as low signal-to-noise ratios (S/N) and limited resolution, thereby challenging accurate reservoir characterization. Aiming at these problems, here we use a stabilized inverse-Q filter to process 3D seismic data, conducting seismic amplitude compensation and waveform phase correction, simultaneously. Comparing the inverse-Q filtered result directly with the raw seismic data in terms of seismic profiling, interior information within the reservoir, characterization of faults and fracture-vuggies, we demonstrate the advantages of stabilized inverse-Q filtering in enhancing seismic resolution, strengthening weak signals, and improving lateral continuity of reflections, and reveal that this method can improve the accuracy of fracture-vuggy characterization in the Ordovician carbonate reservoirs.