Application of Full-layer Q Compensation Technology in Shale Oil Sweet Spot Prediction in Songliao Basin

Abstract

Summary Higher seismic imaging resolution is in need as the targets of exploration and development are transformed from structural reservoirs to lithologic reservoirs, which are becoming more and more complex. To meet the demands of lithologic exploration, seismic data results should be broadband and amplitude preserved. A full-layer Q compensation technology which consists of surface absorption compensation, Q tomography and Q pre-stack depth migration imaging technology is raised. It takes into account the near-surface anomalies with strong absorption and the influence of viscoelastic absorption and attenuation factors during the propagation of seismic waves. Different absorption and attenuation problems from shallow to deep are treated separately. The amplitude attenuation and phase change caused by the absorption of stratum in the travel path from shots to detectors are compensated. The resolution and amplitude attributes are effectively improved in the study area. The seismic result supports the prediction of continental shale oil sweet spots and the deployment need of horizontal wells in Songliao Basin.