Enhanced Oil Recovery Using the Combined ASP-WAG Process
Description of Technology:
The ASP-WAG process is similar to the Water Alternating Gas (WAG) process. Gas is injected in an injection well and is intended to sweep oil towards production wells. After a period of gas injection ASP (alkali, surfactant and polymer) slugs are injected into the injection well. The intention is also to sweep oil towards production wells. Thereafter, ASP slugs are then alternated with gas slugs until the process becomes uneconomic. The WAG ratio and the relative amount of alkali, surfactant and polymer are determined by laboratory experiments.
The ASP-WAG Process can be used to enhance oil recovery by combining two existing methods into one, leading to superior oil recoveries in oil reservoirs.
Features and Benefits:
The greatest benefit of combining these processes is higher oil recovery in oil reservoirs. Potentially, this could lead to hundreds of billions of barrels of additional oil.
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