Output increasing, EOR methods, Fluids injection, Polymeric solution injection, Energy to fluid, Water injection It is able to use fluids injection for increasing gas and petroleum's pits output after exploitation output. In this study we take care for the results of water, gas (CO2), polymer and nitrogen injection. We take consideration two results, about water injection that is one of the usual methods for increasing the output: 1) Protection of tank pressure 2) for replacing petroleum in

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... and following it into the uptake pit. By this method we are able to extract 30% of petroleum that is in the tank, but increasing the water injection percent as improvee mental factor for generation from tank is in long-term. Injection the CO2 gas leads to increase production of petroleum and gas. Generally, injection material into the tank gives energy to fluid, and increase the amount of residue petroleum in tank and divides in to two groups: secondary and tertiary. In this study polymeric material as aqueous phase has tested for bedrock, limestone and sandstone. Results of injection into dense petroleum with sandstone bedrock had been shown. Polymeric solution injection results to increasing the recovery velocity. In this article, it has discussed about each system and finally the proportional system for each tank will consider.