Oilfield Produced Water Treatment Technology Research And Application

In the oil field development and production process produces a large amount of oily waste water, Produced water, such as joint station, wash well drilling wastewater, and return. At the same time, Late in the oil field development, well water increased year by year. The oil and gas wells produced water re-injection of treated ground, either to maintain reservoir pressure and to maintain productivity, and reduce effluent discharge, production and injection form a virtuous circle of balanced, has a very important industrial and environmental significance. On the treatment of oilfield produced water re-injection is not only an important social significance, but also has great economic significance.In this paper, the source of the oil produced water hazards and classification and describes the principle and its advantages and disadvantages of various treatment methods. As the water quality of the field or block complex composition, quite different, the water quality of the treated injection water requirements are not the same, so treatment process should have a choice. The oil field produced water are complicated, the high salt content, high oil content, higher content of suspended matter characteristics of the conventional standards of physical chemical treatment difficult. Changqing Oilfield three plants positive innovation, exploring advanced technology, economic and reasonable oilfield produced water treatment process, proposed micro-organisms, air and double cyclone three produced water treatment technology, and three plants in the oil for a joint oil production in the Jing a joint, two joint Jing, Jing oil quadruple a turn and pilot-scale application.Finally, the three oil fields on the adaptability of produced water treatment process were analyzed and compared, the results show that the application of three plants Caiyou three treatment processes have a high social, economic and environmental benefits, and on this basis under the proposed further research ideas.