Optimization of Water Injection Wells Locations

Abstract

Lack of sufficient natural drive in most reservoirs has led to the practice of supplementing the natural reservoir energy by introducing some form of artificial drive, the most basic method being the injection of gas or water. This technique known as pressure maintenance or reservoir stimulation. Water flooding called secondary recovery because the process yields a second batch of oil production after a field is depleted by primary production. The main purpose of either a natural gas or a water injection process is to repressurize the reservoir and then to maintain the reservoir at a high pressure. Water flooding is the most commonly used secondary oil recovery method for both conventional and heavy oil reservoirs because of its relative simplicity, availability of water, and cost-effectiveness . Aradeiba-D formation pressure was rapidly decreased after it was put in production; so needed pressure support by water injection, in order to repressurize the reservoir , maximize oil production and increase oil recovery. The resaults of asimulation study for the base case shwed that if Aadeiba-D formation production by existing system the presure will decrese rapidly and then more oil will remain in the formation ,therfore low recovery factor will get accordinaly . Drilling new production wells in the potential area to recover more oil will increase little cumulative oil productin but also it still have a low recovery factor due to low pressure support. The study showed that drill new wells for injecting in differentt loctions or convert selected wells with low production rate or hight water cut to injection wells as suggested scenarios it will provide reasonable resaults for presure maintenance therefore increasing the cumulative oil production.