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Quality
Control
of Injection Water: Key to Maintaining Facility and Reservoir Integrity in
Waterflood Projects
Umurhohwo,
Jonathan Oghenovo, Innocent C. Okoro, Chevrontexaco Nigeria Limited, Lagos,
Waterflooding, where successful is an effective secondary
recovery method. One important factor in this success is the quality of the
injected water. Poor quality water could jeopardize the success of the
flooding project due to the adverse effects it could have on the facilities,
injection wells and reservoirs. Processing of the injection water is therefore
imperative, even requiring dedicated surveillance techniques to ensure the
achievement and maintenance of the desired water quality. Achieving and
maintaining the desired quality of injection water becomes more critical in
waterfloods utilizing processed seawater as against those using fresh water.
The paper
discusses the treatment requirements for waterfloods utilizing seawater or
fresh water for injection, together with the surveillance techniques required
to measure, control and maintain the desired water quality. Based on case
studies from managing these waterfloods, thorough discussions were made on the
adverse effects of neglecting water quality