Enhancing vertical resolution with 4D seismic inversion

In this work, we applied a Bayesian time-lapse (4D) seismic inversion to deep-water heavy oil field located in the Campos Basin (Brazil). procedure, differences of amplitudes baseline and repeated surveys are input calculate changes acoustic impedances. To ensure quality results, parametrization was performed by analyzing anomalies resolution signal-to-noise ratio with different values parameters, estimates crosschecked results petroelastic modeling dynamic model. Results show relevant improvement vertical estimated impedances comparison amplitude data thin reservoir (with thickness ranging from 15 45 m). This possible because high-quality acquired (permanent monitoring) variability that is controlled 4D algorithm. The high inverted enabled more detailed zoning reservoir, revealing important geological features, such as channels main interval below reservoir's base, improved understanding fluid movement over time, enabling analysis injection efficiency by-passed zones well aquifer movement. information update static model, improving definition calibrate models, future, adding impedance maps into assimilation procedure.