P11: TIME-LAPSE INVERSION OF Q FACTOR AND VELOCITY

Rock properties play a crucial role in determining the key factors that influence the propagation of seismic waves within the Earth. These properties offer valuable insights into the presence of hydrocarbons, as well as heterogeneities in porosity, saturation, and permeability. Seismic imaging currently serves two primary purposes: mapping variations in the reservoir structure and monitoring recovery processes in real-time (Nur, 1989). Over time, both production and injection activities can alter the response of the reservoir. Time-lapse (or 4D) seismic monitoring is a valuable tool in reservoir management as it allows for tracking and understanding the displacement process. By observing changes in seismic properties such as velocity and quality factor Q, quantitative assessments of fluid changes can be obtained. In this research paper, we examined the alterations in seismic velocity and attenuation over time by comparing different surveys and simulating changes at the reservoir depth. The process of time-lapse inversion for P velocity and Q factor can offer insights into variations in other reservoir properties, such as fluid saturation, porosity, and permeability.