Application of Water Flooding Technique to Improve Oil Recovery in the One of Libyan Sandstone Reservoirs

The terms primary oil recovery, secondary oil recovery, and tertiary (enhanced) oil recovery are traditionally used to describe hydrocarbons recovered according to the method of production or the time at which they are obtained. Waterflooding is the technique used to maintain pressure declined after years of production, usually used to improves oil recovery with injection different waters into the formation. There are many mechanisms behind waterflooding playing important role for increase the incremental oil into sandstone reservoirs. Waterflood technique is affected by the mobility ratio of the displaced to the displacing fluid. Therefore, the oil recovered in a water flooding process is largely determined by the viscosity ratio. Waterflooding is perhaps the most common method of secondary recovery. However, before undertaking a secondary recovery project, it should be clearly proven that the natural recovery processes are insufficient; otherwise, there is a risk that the substantial capital investment required for a secondary recovery project may be wasted