Abstract: In this talk the nature and magnitude of the atmospheric CO2 problem is developed, leading to the push for geologic CO2 sequestration efforts. As an example, our work at the Dickman Field site in Ness County, Kansas is presented. This involves extensive attribute analysis of 3D seismic data, geological property estimation and gridded model-building, followed by flow simulation on regular and refined grids. The goal is to estimate the potential volume of CO2 that could be injected at Dickman as a template for mid-continent sites in the U.S., and quantitative evaluation of the subsurface fate of injected CO2 over long-range simulations lasting several hundred years.