Only operator-based upscaling qualitatively captures the correct fine scale behavior. Our method also does the best of the three methods when the global domain has nonstandard boundary conditions. Finally, the method accurately captures local information about flow trapped by shale barriers. S. Minkoff, William Symes , Steve Bryant , Joe Eaton , and Mary Wheeler , 1998. Differencing of time-dependent seismic monitor surveys requires that datasets are collected and processed consistently.
Inconsistencies can result in data difference noise great enough to obscure any reservoir changes.
Inversion applied to each dataset may account for some of these inconsistencies. As an example, if the shape, temporal location, or radiation pattern of the seismic energy source is not known exactly, data differencing would produce only noise. However, we have shown in previous work that both the source and reflectivity can be accurately recovered via inversion. In this paper we describe a synthetic experiment in which the reservoir contains only oil and water initially. A single production well induces a pore pressure drop and related saturation changes including the formation of a gas cap.