Abstract
ABSTRACTProduced water generated in oil and gas industries contains various organic and inorganic components. Discharging produced water is becoming a problem that needs considerable attention because it can pollute surface and underground water and soil. Major research efforts focus on the treatment methods that were feasible in the view of efficiency and economy. The dispersed oil particles (dop) in the produced water can pollute the underground water and soil and cause blockage in the reinjection process of produced water. In order to obtain a feasible treatment method for removing the dispersed oil from produced water in Z Oilfield, the crude oil from Z Oilfield was analyzed by nuclear magnetic resonance (NMR) spectroscopy. The result showed that the oil was mainly composed of alkanes and aromatic hydrocarbons. Materials with polar group did not exist in the crude oil. The influence of four different agents RDP1, RDP2, RDP3, and RDP4 on the removal of dop was studied at 45°C in this paper. The result showed that RDP3 was the most optimal agent for Z Oilfield. The concentration of RDP3 was optimized in the view of efficiency and economy. The result showed that the feasible concentration of RDP3 was 1,000 mg/L.
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