Experimental Investigation of Gas Injection Enrichment on the Increasing of Oil Recovery Factor and Optimize Its Efficiency

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. In more concrete description can be likened hydrocarbon reservoirs to a full air balloon that shell of the balloon plays the same role as non-permeable rocks upon piercing balanced environment the reservoir fluids (like air when is exited from balloon quickly) push into the well by hydraulic forces. Although the power of this natural drift reduce along the production of the reservoir. As is said, for instant One of the basic parameters for designing miscible gas injection is determining the minimum concentration of gas injection (MMC). The intermediate concentration of components should be similar that the amount of efficiency displacement reaches to maximum value. During the onedimensional flow that gas flow rate closes to gas critical velocity, oil recovery reach to the maximum value. Although this method has been successfully applied in many carbonate reservoirs, studies and experiments have shown that injected carbon dioxide chose the fracture path and breakthrough operates quickly. Therefore, injection efficiency reduces consequently.