Field Test of Electrochemical Degradation and Oil-Removal Technology Used the Treatment of Wastewater Containing Polymer in Offshore Oilfield
Affiliation(s)
1 College of Chemical and Environmental Engineering, Yangtze University, Jingzhou, China. 2 State Key Laboratory of Offshore Oil Exploitation, Beijing, China. 3 CNOOC Research Institute, Beijing, China.
1 College of Chemical and Environmental Engineering, Yangtze University, Jingzhou, China. 2 State Key Laboratory of Offshore Oil Exploitation, Beijing, China. 3 CNOOC Research Institute, Beijing, China.
ABSTRACT
Aimed at the current treatment status of the polymer-flooding wastewater in Bohai oilfield, electrochemical technology used for polymer-degradation and oil-removal was researched. It formed the process flow of cyclone mixed dosing → electrochemical removal oil → inclined tube removal oil → walnut shell filter, and a set of skid mounted wastewater containing polymer treatment plant was designed and manufactured, which was used for the field test of electrochemical treatment of wastewater containing polymer in offshore oilfield. The result shows that the oil removal rate of the electrochemical treatment process is over 98%, and the synergistic effect is significant especially used in conjunction with water clarifier of BHQ-04. When the amount of water clarifier is 50 - 150 mg/L, the oil content, the median particle diameter and the suspended solids content of the filtered water is 8 - 18 mg/L, 1.9 - 2.26 μm and 1.39 - 2.04 mg/L respectively, which reach the scene water quality standards for water injection.
Aimed at the current treatment status of the polymer-flooding wastewater in Bohai oilfield, electrochemical technology used for polymer-degradation and oil-removal was researched. It formed the process flow of cyclone mixed dosing → electrochemical removal oil → inclined tube removal oil → walnut shell filter, and a set of skid mounted wastewater containing polymer treatment plant was designed and manufactured, which was used for the field test of electrochemical treatment of wastewater containing polymer in offshore oilfield. The result shows that the oil removal rate of the electrochemical treatment process is over 98%, and the synergistic effect is significant especially used in conjunction with water clarifier of BHQ-04. When the amount of water clarifier is 50 - 150 mg/L, the oil content, the median particle diameter and the suspended solids content of the filtered water is 8 - 18 mg/L, 1.9 - 2.26 μm and 1.39 - 2.04 mg/L respectively, which reach the scene water quality standards for water injection.
Cite this paper
Yang, M. , Li, Q. , Yin, X. , Zhai, L. and Jing, B. (2015) Field Test of Electrochemical Degradation and Oil-Removal Technology Used the Treatment of Wastewater Containing Polymer in Offshore Oilfield. Journal of Water Resource and Protection, 7, 1409-1415. doi: 10.4236/jwarp.2015.717114.
Yang, M. , Li, Q. , Yin, X. , Zhai, L. and Jing, B. (2015) Field Test of Electrochemical Degradation and Oil-Removal Technology Used the Treatment of Wastewater Containing Polymer in Offshore Oilfield. Journal of Water Resource and Protection, 7, 1409-1415. doi: 10.4236/jwarp.2015.717114.
References
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[1] Zhou, S.W., Han, M., Xian, W.T., et al. (2006) Application of EOR Technology by Means of Polymer Flooding in Bohai Oilfields. China Offshore Oil and Gas, 18, 386-389. [2] Jiang, T. and Fang, J. (2012) Study on the Flocculants for Treating Polymer-Bearing Wastewater in SZ36-1 Oilfield. Industrial Water Treatment, 32, 81-83. [3] Chen, W., Jing, B., Zhang, J., et al. (2012) Study on the Aggregative Properties of Polymer-Flooding Oil-Bearing Wastewater. Industrial Water Treatment, 32, 77-80. [4] Shen, M.H. and Wang, J.B. (2009) Study on the Wastewater Treatment of Polymer Flooding Produced Water in Bohai Oilfield. Industrial Water Treatment, 29, 69-71. [5] Jing, B., Zhai, L., Zhang, J., et al. (2014) Development of Clarifiers for Produced Water Used for Offshore Polymer Flooding Oilfields. Oil Forum, 33, 9-11. [6] Zhang, J. (2013) An Effective Method for High Efficiency Treatment of Wastewater Containing Polymer in Offshore Oilfield. Oil-Gasfield Surface Engineering, 32, 9-10. [7] Chen, W., Yin, X.Q., Zhang, J., et al. (2013) Experimental Study of Electrochemical Treatment of the Polymer-flooding Oily Wastewater. State Key Laboratory of High Efficiency Development of Marine Oil. New Technology for High Efficiency Development of Offshore Heavy Oil. Petroleum Industry Press, Beijing, 367-374. [8] Chen, W. and Mei, P. (2013) Electrochemical Techniques for Environmental Pollution Control. Petroleum Industry Press, Beijing. [9] Qu, J.H. and Liu, H.J. (2007) Electrochemical Principle and Technology of Water Treatment. Science Press, Beijing. [10] Yin, X.Q., Zhang, J., Jing, B., et al. (2012) Effect of Polymer Content of Polymer-Flooding Sewage Water on Equipment for Wastewater Treatment. Techniques and Equipment for Environmental Pollution Control, 6, 3499-3502. [11] Yin, X.Q., Jing, B., Xiao, Q.Y., et al. (2012) Study on Inclined Tube Oil Eliminator Separation Efficiency Optimization for Polymer Wastewater LD10-1Viscous Crude Oil in Bohai. State Key Laboratory of High Efficiency Development of Marine Oil. New Technology for High Efficiency Development of Offshore Heavy Oil. Petroleum Industry Press, Beijing, 138-142. [12] Yin, X.Q., Jing, B., Zhang, J., et al. (2014) Multifunctional oil Bearing Wastewater Treatment Plant: China, ZL 2012 10554801.3. [13] Xiao, Q.Y., Yin, X.Q., Sun, P.J., et al. (2013) A Treatment Agent BHQ-402 Used for Wastewater Containing Polymer and Oil. Oilfield Chemistry, 30, 597-599. [14] Yin, X.Q., Jing, B., Xiao, Q.Y., et al. (2013) Study on the Separation Efficiency of Inclined Tube Oil Removal-Filtration for Polymer Wastewater. Journal of Filtration & Separation, 23, 1-3, 17. [15] Yin, X.Q., Jing, B., Fu, J.X., et al. (2014) A Non Power Swirl Reactor for Oil Bearing Wastewater in Oil Field: China, ZL 2013 1 0120325. 9.