Part 1: Overview of Produced and Enhanced Oil Recovery Water Treatment
By Avijit Dey, Ph.D.
Produced water is mainly salty water trapped in the reservoir rock and brought up along with oil or gas during production. It can hold very minor amounts of chemicals added down-hole during production. These waters exist under high pressures and temperatures, and usually contain oil and metals. The treatment of produced water is a key component of the cost of producing oil and gas. The ability to efficiently and economically dispose of this water is vital to the success in the oil production business. In this article, produced water treatment approach for shale gas, oil sand mining, oil sand steam assisted gravity drainage (SAGD), coal bed methane (CBM), coal seam gas (CSG), and offshore oil/ gas development fields shall be discussed. In addition, technical options for the enhanced oil recovery (EOR) water treatment shall also be discussed.
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