Additional oil and produced water samples were collected for use in completing the laboratory work. Reservoir Characterization The Griggs 107 well has been designated the type well for the pilot study because it has the best core recovery of the six wells cored for the pilot flood. The Cypress Sandstone has been subdivided into five separate reservoir compartments in the pilot area. Graph of permeability measurements in core analysis report shows low permeability rocks separate the A, B, C, D, and E sandstones in the middle Cypress sandstone from one another. Examination of cores show that low permeability units are composed of siltstone, shale and interbedded shale and fine-grained sandstone. These permeability barriers separate reservoir compartments from one another in the Cypress Sandstone. Geophysical logs have been evaluated in each well in the pilot area. Formation depths have been established for all wells and the Cypress sandstone has been subdivided in each well in the pilot area. The Pennsylvanian Bridgeport A, B and D sandstones have also been subdivided in each well in the pilot area.