This book intends to study the feasibility of carbon dioxide injection in naturally fractured reservoir . Recovery efficiencies and cash flow were studied with carbon-di-oxide and water injection simulation analysis in field case model and block case model . It was observed with simulation cases that CO2 penetration into the matrix is higher than water penetration. CO2 dissolves the lighter component of the oil , which reduces oil viscosity and makes oil swell, whereas water imbibes into the matrix due to capillary forces. Diffusion of CO2 into matrix starts after reaching...