Low-frequency amplitude analysis for oil detection considering the reservoir thickness variations
Irina Privalova, Gennady Goloshubin, Pavel Rusakov, Yuriy Tcimbaluk · 2015
Summary The methodology of detection and mapping of oil-saturated zones within the Middle Jurassic reservoirs in the cross-well space utilizing the low-frequency amplitude analysis is shown. It takes into account an influence of the thickness variations of the formation on amplitude at low seismic frequencies. The additive model of the seismic reservoir response including the thickness variations is developed and applied. It allows excluding the effect of the thickness variation of the formation on seismic amplitudes and improves the results. The methodology also includes the quantitative criterion using borehole information for separation of the oil-saturated zones from water saturated zones in an interwell space.