Afshin Davarpanah and Zarei M
Hydrocarbon reservoir is a porous and permeable structure in underground that are placed natural accumulation hydrocarbons in a liquid or gas forms and they are isolated by non-permeable rocks from the surrounding environment. Petroleum industry has used a wide variety of methodologies for stimulating the reservoir fluids to obtain the maximum amount of production rate in the surface; this method entails CO2 injection by transporting to the preferred layers which had the most recovery factor over a period of 35 years. Besides, in terms of fractured reservoirs enhanced oil recovery of these formations were poorly considerable candidates due to the complexity of predicting the productivity of these reservoirs. Oil and injected fluids tend to produce oil through gaps or cracks in the matrix block and cannot be moved easily. The purpose of this research is to gradually increase the extent of recovery by injecting carbon dioxide, methane and water. PVT modules of Eclipse software were being used. By injecting carbon dioxide into the reservoir, Injected Gas due to its gravity drainage move through the fracture of block matrix.
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