Integration of multicomponent processing and interpretation of the Pouce Coupe time-lapse survey: focus on shear-wave splitting analysis

摘要

Multicomponent seismic processing and interpretation have become disconnected in industry practice, hindering the ability to extract meaningful reservoir characterization conclusions. Integrating seismic processing with the final interpretation goals elevates seismic characterization and drives advancements in processing algorithms. The focus of this study was on seismic characterization using converted-waves (C-waves) because of their high sensitivity to the azimuthal anisotropy caused by preferential fractures and differential stress, and ultimately because they provide a method of correlating hydraulic stimulation success to the enhanced permeability pathways created in the hydraulic completion process. This study combines the processing and interpretation of the Pouce Coupe time-lapse (4D) multicomponent (3C) surveys (Figure 1), investigating hydraulic stimulations of two horizontal wells targeting the Montney shale. Due to unsatisfactory processing results the data set was reprocessed utilizing new methods to better preserve vector fidelity, improve prestack shear-wave splitting (SWS) analysis and layer stripping, and enhance 4D repeatability. The updated results show a strong correlation between the magnitude and orientation of seismically derived induced reservoir azimuthal anisotropy and individual stage production. The baseline characterization provides a strong argument that drilling and completion practices should be driven by interpretation of the local scale reservoir complexities that can improve completion success.