Impact of the WAG Injection on the ultimate oil recovery factor.

Abstract

The Water Alternating Gas (WAG) process is a cyclic method of injecting gas followed by water and repeating this process over several cycles. The main purpose of WAG injection is to improve oil recovery, by increasing both macroscopic and microscopic sweep efficiency and to help maintain the reservoir pressure. In addition, the impact of water alternating gas (WAG) injection on ultimate oil recovery is significant. Due to the WAG postponing the gas breakthrough. Moreover, its process provides mobility control in fast zones which extends gas project life and oil recovery. the key parameters that affect WAG injection are the WAG ratio, cycle time, slug size, rock fluid properties ... etc. as WAG injection offers high fluid efficiency, is compatible with certain reservoir types, and has lower operational costs compared to other EOR methods. as an example (chapter IV) compared the Water Alternate Gas (WAG) and the Water Huff n Puff techniques for oil recovery in a tight oil reservoir, based on their effectiveness, their recoveries, as well as assessing the factors that affect the recovery based on both of the techniques. The result showed that Water Alternating Gas (WAG) has better results than using a Water Huff and Puff method