Seyed Adib Sajjadi - Islamic Azad University, Omidieh Branch, Omidieh, Iran
Hamid Reza Nasriani - Islamic Azad University, Omidieh Branch, Omidieh, Iran
Keyvan Dailami - Islamic Azad University, Omidieh Branch, Omidieh, Iran
Mohammad Sinaei - Islamic Azad University, Omidieh Branch, Omidieh, Iran

Fast shutting production wells because of water producing, perform important role to determine production efficiency and useful life of reservoir. In this study by using the concept of stream lines, production and injection wells capabilities with respect to their position in the reservoir were studied and postponing the shut in time of producing wells, increases oil displacement and production efficiency resulted. With increasing injection flow rate necessarily, oil displacement and recovery don’t become better than before. So, suitable injection rates according to injection and production wells position have to be determined. Also production wells flow rate can affect very much on sweep efficiency optimization and increasing of injection wells efficiency. In this study, according to the position of production and injection wells and water production rates resulting from injection wells, four scenarios with changes in the injection and production rates were done. This led to be reduced water production and water injection. Also increasing production efficiency and reservoir life resulted

Production Efficiency, Oil Displacement Efficiency, Streamline, Production well, Injection well, Optimal positioning