The objective of this study is to develop a process that will increase ultimate oil recovery and will improve the operational economics of CO/sub 2/ flooding over current state-of-the-art practices. The specific goals of the research work are: to determine and evaluate the optimum conditions and materials for chemical precipitation over a realistic range of reservoir pressures and temperatures; to evaluate the permeability alteration by in-situ chemical precipitation in core samples; to extend the laboratory results to predict the outcome of the field application by modeling and computer simulation; and to determine the expected increase oil recovery through application of the in-situ precipitation to a specific target reservoir. During year one, the following tasks and subtask were completed: Task I - technology review; Task II - experimental design, construction and calibration; and subtask I - precipitation formation of Task III. Accomplishments for these tasks are discussed. The comparison of the ambient and PVT cell test results of precipitation formation indicate that both CaCl/sub 2/ and BaCl/sub 2/ have potential for use in core tests. However, at this time the BaCl/sub 2/ appears to be the better choice. 4 tabs.