Research progress on treatment technologies of alkali/surfactant/polymer flooding produced water

doi:10.16085/j.issn.1000-6613.2020-0222

Abstract

Abstract:

With the wide application of alkali/surfactant/polymer (ASP) flooding oil recovery technology in oilfield, the yield of ASP flooding produced water is increasing. The characteristics of ASP flooding produced water is complex, which include high salinity, high viscosity, high oil emulsification, high content of small oil droplets and difficult separation of oil from water, resulting in an increasing negative impact on oilfield production and the environment. Therefore, it is important to study the efficient treatment technologies of ASP flooding produced water. This study analyzed the factors that affect the oil-water separation characteristics of ASP flooding produced water. The advanced technologies for ASP flooding produced water treatment in China, such as membrane separation, air flotation separation, advanced oxidation method, and microbiological method, etc. were introduced. The advantages and problems of various treatment technologies were described. The application situation of air flotation separation and microbiological method in ASP flooding produced water treatment was emphatically introduced. The treatment technologies of ASP flooding produced water in Daqing oilfield were introduced. Finally, some prospects were put forward for future researches.

Key words: alkali/surfactant/polymer flooding, produced water, oil-water separation, air flotation separation, microbiological method

摘要：

随着三元复合驱采油技术在油田的广泛应用，三元复合驱采出水产量不断增加。三元复合驱采出水水质复杂，具有矿化度高、黏度大、含油乳化程度高、小油滴含量高、油水分离困难等特点，对油田生产和环境的影响日益严重。因此，开展三元复合驱采出水高效处理方法的研究成为一项重要的任务。本文分析了影响三元复合驱采出水油水分离特性的各种因素，介绍了目前国内应用于三元采出水处理的先进技术，如膜分离法、气浮选分离法、高级氧化法、微生物法等，阐述了这些处理技术的优势及存在的问题，重点介绍了气浮选分离法和微生物法在三元采出水处理中的应用情况，并对大庆油田三元复合驱采出水现场处理工艺进行了介绍，最后对今后的研究工作提出了一些展望。

关键词: 三元复合驱, 采出水, 油水分离, 气浮选分离法, 微生物法

CLC Number:

TE992

Bin HUANG, Chen WANG, Cheng FU, Siqiang FU, Likai HUANG, Weisen ZHANG. Research progress on treatment technologies of alkali/surfactant/polymer flooding produced water[J]. Chemical Industry and Engineering Progress, 2020, 39(10): 4238-4247.

黄斌, 王晨, 傅程, 付思强, 黄立凯, 张伟森. 三元复合驱采出水处理研究进展[J]. 化工进展, 2020, 39(10): 4238-4247.

References

1	程杰成, 吴军政, 吴迪. 三元复合驱油技术[M]. 北京: 石油工业出版社, 2013.
1	CHENG Jiecheng, WU Junzheng, WU Di. Alkali/surfactant/polymer flooding technology[M]. Beijing: Petroleum Industry Press, 2013.
2	周卫东, 佟德水, 李罗鹏. 油田采出水处理方法研究进展[J]. 工业水处理, 2008, 28(12): 5-8.
2	ZHOU Weidong, TONG Deshui, LI Luopeng. Research and development of oilfield produced water treatment methods[J]. Industrial Water Treatment, 2008, 28(12): 5-8.
3	LI J X, LIU Y, WU D, et al. The synergistic effects of alkaline, surfactant, and polymer on the emulsification and destabilization of oil-in-water crude oil emulsion produced by alkaline-surfactant-polymer flooding[J]. Petroleum Science and Technology, 2013, 31: 399-407.
4	张威, 黄斌, 王莹莹, 等. 三元复合驱采出水处理技术研究进展[J]. 化工环保, 2017, 37(2): 152-158.
4	ZHANG Wei, HUANG Bin, WANG Yingying, et al. Research processes on treatment technologies of alkali/surfactant/polymer (ASP) flooding produced water[J]. Environmental Protection of Chemical Industry, 2017, 37(2): 152-158.
5	鞠野. 一元/二元/三元驱油体系微观驱油机理研究[D]. 大庆: 大庆石油学院, 2006.
5	JU Ye. Microscopic displacement mechanism of S/SP/ASP driving residual oil[D]. Daqing: Daqing Petroleum Institute, 2006.
6	程杰成, 王庆国, 王俊, 等. 强碱三元复合驱钙、硅垢沉积模型及结垢预测[J]. 石油学报, 2016, 37(5): 653-659.
6	CHENG Jiecheng, WANG Qingguo, WANG Jun, et al. Ca/Si scale sedimentary model in the strong-base ASP flooding block and scaling prediction[J]. Acta Petrolei Sinica, 2016, 37(5): 653-659.
7	杜丹. 三元复合驱采出水中新矿微粒生成及控制研究[D]. 大庆: 大庆石油学院, 2009.
7	DU Dan. Study on generation and control of new mineral particles in ASP flooding produced water[D]. Daqing: Daqing Petroleum Institute, 2009.
8	赵云发. 基于硫电子受体三元复合驱采出水BESI技术快速启动研究[D]. 哈尔滨: 哈尔滨工业大学, 2017.
8	ZHAO Yunfa. Study on fast start-up of ASP flooding wastewater BESI technique based on sulfur electron acceptor[D]. Harbin: Harbin Institute of Technology, 2017.
9	UMA A A, SAAID I B M, SULAIMON A A, et al. A review of petroleum emulsions and recent progress on water-in-crude oil emulsions stabilized by natural surfactants and solids[J]. Journal of Petroleum Science and Engineering, 2018, 165: 673-690.
10	DENG S B, BAI R B, CHEN J P, et al. Effects of alkaline/surfactant/polymer on stability of oil droplets in produced water from ASP flooding[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2002, 211(2): 275-284.
11	DENG S B, YU G, JIANG Z P, et al. Destabilization of oil droplets in produced water from ASP flooding[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2005, 252(2/3): 113-119.
12	王方林. 强碱体系三元复合驱采出水油水分离特性及处理技术研究[D]. 上海: 上海交通大学, 2007.
12	WANG Fanglin. Research on oil/water separation specialties and disposal technologies in ASP flooding produced water[D]. Shanghai: Shanghai Jiao Tong University, 2007.
13	陈竹云, 王国柱, 樊鹏军, 等. 油田含油污水高级氧化技术研究[J]. 油气田环境保护, 2010, 20(3): 36-39, 65.
13	CHEN Zhuyun, WANG Guozhu, FAN Pengjun, et al. A study on advanced oxidization technology of oily water treatment at oilfields[J]. Environmental Protection of Oil & Gas Fields, 2010, 20(3): 36-39, 65.
14	黄斌, 张威, 王捷, 等. 驱油剂对三元复合驱含油污水中油滴稳定性的影响[J]. 化工进展, 2019, 38(2): 1053-1061.
14	HUANG Bin, ZHANG Wei, WANG Jie, et al. Effect of oil displacement agent on oil droplet stability in alkali/surfactant/polymer flooding oily wastewater[J]. Chemical Industry and Engineering Progress, 2019, 38(2): 1053-1061.
15	张威. 三元复合驱采出水中油滴的稳定性及脱稳机理研究[D]. 大庆: 东北石油大学, 2018.
15	ZHANG Wei. Study on the stability and destabilization mechanism of oil droplets in produced water from alkali-surfactant-polymer flooding[D]. Daqing: Northeast Petroleum University, 2018.
16	WANG D, JIAO Y J. The emulsification characteristics research of produced fluid in weak base alkaline-surfactant-polymer flooding[C]// 2016 6th International Conference on Machinery, Materials, Environment, Biotechnology and Computer. France: Atlantis Press, 2016.
17	孙建峰, 刘大锰, 郭东红, 等. 三元复合驱中表面活性剂的应用与发展[J]. 石油钻采工艺, 2010, 32(2): 113-117.
17	SUN Jianfeng, LIU Dameng, GUO Donghong, et al. Application and progress of surfactants for ASP flooding[J]. Oil Drilling & Production Technology, 2010, 32(2): 113-117.
18	刘文杰. 强碱体系三元复合驱采出液油水分离特性研究[D]. 大庆: 大庆石油学院, 2007.
18	LIU Wenjie. Studies on oil-water separation property of ASP flooding produced liquid[D]. Daqing: Daqing Petroleum Institute, 2007.
19	叶清. 三元复合驱采出水特性分析及其处理方法研究[D]. 上海: 上海交通大学, 2008.
19	YE Qing. Research on oil/water separation characteristic and treatment in ASP produced water[D]. Shanghai: Shanghai Jiao Tong University, 2008.
20	JIANG G Q, WEI L, LI C Y, et al. Research on demulsification features of polymer flooding produced fluids of O/W with high water content for oilfield and the demulsification efficacy[J]. Research Journal of Applied Sciences, Engineering and Technology, 2012, 4(21): 4443-4448.
21	方洪波. 聚合物驱采出液破乳机理研究[D]. 东营: 胜利油田博士后科研工作站, 2004.
21	FANG Hongbo. Studies on demulsification mechanism of the produced fluid flooded by polymer[D]. Dongying: Working Station for Postdoctoral Scientific Research of Shengli Oilfield, 2004.
22	ZHANG L H, XIAO H, ZHANG H T,et al. Optimal design of a novel oil-water separator for raw oil produced from ASP flooding[J]. Journal of Petroleum Science and Engineering, 2007, 59: 213-218.
23	黄斌, 王捷, 傅程, 等. 油田采出水处理技术研究新进展[J]. 现代化工, 2018, 38(8): 52-57.
23	HUANG Bin, WANG Jie, FU Cheng, et al. Latest research progress on treatment technology for oilfield produced water[J]. Modern Chemical Industry, 2018, 38(8): 52-57.
24	MOHAMMADI M, SHAHHOSSEINI S, BAYAT M, et al. Direct numerical simulation of water droplet coalescence in the oil[J]. International Journal of Heat and Fluid Flow, 2012, 36: 58-71.
25	黄斌, 张威, 王莹莹, 等. 陶瓷膜过滤技术在油田含油污水中的应用研究进展[J]. 化工进展, 2017, 36(5): 1890-1898.
25	HUANG Bin, ZHANG Wei, WANG Yingying, et al. Application and research progress of ceramic membrane filtration technology in the treatment of oily wastewater in oil field[J]. Chemical Industry and Engineering Progress, 2017, 36(5): 1890-1898.
26	ZHANG F S, WANG F. The development and application of a demulsifier used for ASP flooding-produced liquid from the Xing 2 area of the Daqing Oilfield[J]. Petroleum Science and Technology, 2011, 29: 69-78.
27	ZHANG R Q, LIANG C H, WU D. Characterization and demulsification of produced liquid from weak base ASP flooding[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2006, 290: 164-171.
28	董晶颢, 田禹, 熊晔. 生物法处理特低渗透油田采出水可行性及工艺[J]. 哈尔滨工业大学学报, 2010, 42(6): 929-932.
28	DONG Jinghao, TIAN Yu, XIONG Ye. Feasibility and technology of biological treatment for extra-low permeability oilfield produced water[J]. Journal of Harbin Institute of Technology, 2010, 42(6): 929-932.
29	LONG Y F, SHEN Y Q, TIAN H F, et al. Superwettable coprinus comatus coated membranes used toward the controllable separation of emulsified oil/water mixtures[J]. Journal of Membrane Science, 2018, 565: 85-94.
30	WANG X Y, LI M J, SHEN Y Q, et al. Facile preparation of loess-coated membranes for multifunctional surfactant-stabilized oil-in-water emulsion separation[J]. Green Chemistry, 2019, 21: 3190-3199.
31	KUMAR S, NANDI B K, GURIA C, et al. Oil removal from produced water by ultrafiltration using polysulfone membrane[J]. Brazilian Journal of Chemical Engineering, 2017, 34(2): 583-596.
32	ABDOLHAMID S, TORAJ M, REZA M B, et al. Asymmetric polyethersulfone ultrafiltration membranes for oily wastewater treatment: synthesis, characterization, ANFIS modeling, and performance[J]. Journal of Environmental Chemical Engineering, 2015, 3: 170-178.
33	ABDOLHAMID S, TORAJ M, REZA M B, et al. PES and PES/PAN blend ultrafiltration hollow fiber membranes for oily wastewater treatment: preparation, experimental investigation, fouling, and modeling[J]. Advances in Polymer Technology, 2015, 34: 1-16.
34	SILVIO E W, ANA M T, CRISTIANO P B, et al. Evaluation of ceramic membranes for oilfield produced water treatment aiming reinjection in offshore units[J]. Journal of Petroleum Science and Engineering, 2015, 131: 51-57.
35	WESCHENFELDER S E, BORGES C P, CAMPOS J C, et al. Oilfield produced water treatment by ceramic membranes: bench and pilot scale evaluation[J]. Journal of Membrane Science, 2015, 495: 242-251.
36	IGUNNU E T, CHEN G Z. Produced water treatment technologies[J]. International Journal of Low-Carbon Technologies, 2014, 9: 157-177.
37	ZHANG B, YU S L. Application of a polytetrafluoroethylene (PTFE) flat membrane for the treatment of pre-treated ASP flooding produced water in a Daqing oilfield[J]. RSC Advances, 2016, 6: 62411-62419.
38	ETCHEPARE R, OLIVEIRA H, AZEVEDO A, et al. Separation of emulsified crude oil in saline water by dissolved air flotation with micro and nanobubbles[J]. Separation and Purification Technology, 2017, 186: 326-332.
39	ALIFF R, ABIA-BITEO B, THORPE R B. Removal of fine oil droplets from oil-in-water mixtures by dissolved air flotation[J]. Chemical Engineering Research and Design, 2016, 115: 19-33.
40	丁良涛. 溶气气浮工艺处理三元复合驱采出水试验[J]. 油气田地面工程, 2015, 34(8): 43-44, 46.
40	DING Liangtao. Experiment on treatment of produced water from ASP flooding by dissolved air flotation process[J]. Oil-Gas Field Surface Engineering, 2015, 34(8): 43-44, 46.
41	WANG C Y, WANG Z X, WEI X Y, et al. A numerical study and flotation experiments of bicyclone column flotation for treating of produced water from ASP flooding[J]. Journal of Water Process Engineering, 2019, 32: 100972.
42	王存英, 张达志. 微波破乳-双旋流气浮处理含油污水试验[J]. 环境工程, 2016, 34(5): 1-5.
42	WANG Cunying, ZHANG Dazhi. Separation of oil from wastewater by microwave assisted demulsification/bi-cyclone column flotation[J]. Environmental Engineering, 2016, 34(5): 1-5.
43	蒋立民. 用于三元复合驱采出水的二氧化碳溶气装置及处理方法: CN104961184A[P]. 2015-10-07.
43	JIANG Limin. The carbon dioxide that is used for the ASP flooding produced water dissolves gas device and processing method: CN104961184A[P]. 2015-10-07.
44	董兴. 海上油田采出水处理工艺优化[D]. 成都: 西南石油大学, 2017.
44	DONG Xing. Optimization of produced water treatment process for offshore oilfield[D]. Chengdu: Southwest Petroleum University, 2017.
45	DAI X D, FANG J, LI L, et al. Enhancement of COD removal from oilfield produced wastewater by combination of advanced oxidation, adsorption and ultrafiltration[J]. International Journal of Environmental Research and Public Health, 2019, 16: 3223.
46	赵霞, ISMOILOV Bakhrom, 李亚斌, 等. 污水高级氧化技术的研究现状及其新进展[J]. 水处理技术, 2018, 44(4): 7-10, 16.
46	ZHAO Xia, ISMOILOV Bakhrom, LI Yabin, et al. Research status and new progress of advanced oxidation technology for wastewater treatment[J]. Technology of Water Treatment, 2018, 44(4): 7-10, 16.
47	贾新. 油田三元采出水氧化降粘及聚合物降解机理研究[D]. 哈尔滨: 哈尔滨工程大学, 2015.
47	JIA Xin. Research on the mechanism of oxidating viscosity-reducing and polymer degradation for ASP produced water of oilfield[D]. Harbin: Harbin Engineering University, 2015.
48	张雷. 超声强化工艺处理三元驱采油污水和含油污泥效能的研究[D]. 哈尔滨: 哈尔滨工业大学, 2014.
48	ZHANG Lei. Treating efficiency of ASP flooding produced wastewater and oily sludge by ultrasound enhancement process[D]. Harbin: Harbin Institute of Technology, 2014.
49	王越. 三元复合驱污水的光催化处理[D]. 大庆: 东北石油大学, 2015.
49	WANG Yue. Photocatalytic treatment of ASP flooding sewage[D]. Daqing: Northeast Petroleum University, 2015.
50	夏福军, 国胜娟, 徐德会, 等. 大庆油田三次采油采出水处理技术[J]. 油气田环境保护, 2017, 27(2): 34-37, 61.
50	XIA Fujun, GUO Shengjuan, XU Dehui, et al. Treatment technology of three oil production water in Daqing oilfield[J]. Environmental Protection of Oil & Gas Fields, 2017, 27(2): 34-37, 61.
51	KAY C M, STRINGFELLOW W T. Biological treatment of oil and gas produced water: a review and meta-analysis[J]. Clean Technologies and Environmental Policy, 2018, 20: 1127-1146.
52	HAO Q Q, SHI R J, HAO J S, et al. Characterization of microbial community in produced water from a petroleum reservoir subjected to alkali-surfactant-polymer (ASP) flooding[J]. Journal of Applied Ecology, 2017, 28(10): 3393-3402.
53	张广福. 微生物法处理三元复合驱采出水试验[J]. 油气田地面工程, 2016, 35(7): 28-31.
53	ZHANG Guangfu. Microbiological method study on ASP flooding produced water test[J]. Oil-Gas Field Surface Engineering, 2016, 35(7): 28-31.
54	GONG D, QIN G. Treatment of oilfield wastewater using a microbial fuel cell integrated with an up-flow anaerobic sludge blanket reactor[J]. Desalination and Water Treatment, 2012, 49: 272-280.
55	LUSINIER N, SEYSSIECQ I, SAMBUSITI C, et al. Biological treatments of oilfield produced water: a comprehensive review[J]. SPE Journal, 2019, 24(5): 2135-2147.
56	PENDASHTEH A R, FAKHRU’L-RAZI A, CHUAH T G, et al. Biological treatment of produced water in a sequencing batch reactor by a consortium of isolated halophilic microorganisms[J]. Environmental Technology, 2010, 31: 1229-1239.
57	张宏奇. 微生物-电催化氧化组合工艺处理油田采出水[J]. 水处理技术, 2018, 44(1): 107-109, 113.
57	ZHANG Hongqi. Treatment of oilfield produced water by microbial/electrocatalytic oxidation combined process[J]. Technology of Water Treatment, 2018, 44(1): 107-109, 113.
58	杜荣光. 水解酸化-膜生物反应器处理油田采油污水实验[J]. 油气地质与采收率, 2011, 18(5): 108-110, 118.
58	DU Rongguang. Studies on membrane bioreactor for oilfield waste water treatment[J]. Petroleum Geology and Recovery Efficiency, 2011, 18(5): 108-110, 118.
59	李凡. 活性污泥法与生物膜法组合工艺处理含油污水[J]. 石油机械, 2015, 43(6): 103-107.
59	LI Fan. Combination of activated sludge process and biofilm process for oily sewage treatment[J]. China Petroleum Machinery, 2015, 43(6): 103-107.
60	刘长莉, 王宝鑫, 李娜, 等. 弱碱三元采出水ABR生物处理工艺研究[J]. 环境科学与技术, 2015, 38(S1): 198-204, 219.
60	LIU Changli, WANG Baoxin, LI Na, et al. The research on ABR biological treatment of low alkali-type ASP produced water[J]. Environmental Science & Technology, 2015, 38(S1): 198-204, 219.
61	王宝鑫. 基于ABR生物反应器三元复合驱采出水处理效能研究[D]. 哈尔滨: 东北林业大学, 2015.
61	WANG Baoxin. The study on ABR biological treatment efficiency of ASP flooding produced water[D]. Harbin: Northeast Forestry University, 2015.
62	高芳, 刘东方, 张丽, 等. 混凝-酵母菌生物膜联合工艺处理三元驱采油废水[J]. 环境工程学报, 2015, 9(8): 3871-3877.
62	GAO Fang, LIU Dongfang, ZHANG Li, et al. Oilfield produced water from alkali surfactant polymer (ASP) flooding by process of coagulation combined yeast biofilm[J]. Chinese Journal of Environmental Engineering, 2015, 9(8): 3871-3877.
63	杨敬杰. 三元复合驱采出水物理掺混生物强化处理技术及工艺研究[D]. 哈尔滨: 东北林业大学, 2014.
63	YANG Jingjie. The study on biofortification treatment technology and process of ASP flooding produced water’s physical blending[D]. Harbin: Northeast Forestry University, 2014.
64	潘春波. 三元采出液A/O工艺生物强化处理效能研究[D]. 哈尔滨: 东北林业大学, 2013.
64	PAN Chunbo. ASP produced fluid of A/O process biological enhancing the processing efficiency[D]. Harbin: Northeast Forestry University, 2013.
65	古文革, 陈忠喜, 赵秋实, 等. 大庆油田三元复合驱采出水处理工艺技术[J]. 工业用水与废水, 2018, 49(2): 48-53.
65	GU Wenge, CHEN Zhongxi, ZHAO Qiushi, et al. Technology of ASP flooding produced water treatment in Daqing oilfield[J]. Industrial Water & Wastewater, 2018, 49(2): 48-53.
66	陈忠喜, 舒志明. 大庆油田采出水处理工艺及技术[J]. 工业用水与废水, 2014, 45(1): 36-39, 46.
66	CHEN Zhongxi, SHU Zhiming. Process and technology of produced water treatment in Daqing oilfield[J]. Industrial Water & Wastewater, 2014, 45(1): 36-39, 46.
67	ZHANG Y K, WANG H C, QI L, et al. Simple model of sludge thickening process in secondary settlers[J]. Frontiers of Environmental Science & Engineering, 2016, 10(2): 319-326.

[1]	LIU Zhanjian, YANG Jinyue, JING Jing, ZHANG Xiguang, WANG Huaiyuan. Research progress of three-dimensional super-wetting porous materials in oil-water separation [J]. Chemical Industry and Engineering Progress, 2023, 42(1): 310-320.
[2]	YE Zequan, WU Qingyun, GU Lin. Recent progress in cellulose-based materials for oil-water separation [J]. Chemical Industry and Engineering Progress, 2022, 41(6): 3038-3050.
[3]	ZHANG Ao, FANG Jianyu, LIU Bo, ZHAO Xuangang, HUANG Li, HUANG He, RAN Liangtao, SU Biyun. Composite removal of iron and calcium technology for gas field produced water [J]. Chemical Industry and Engineering Progress, 2021, 40(6): 3091-3098.
[4]	YAN Hongqin, ZHENG Wengrui, ZHANG Guiyu, WANG Yu, WANG Mengran, ZHU Minhui. Preparation of hydrophobic/oleophilic luffa and its application in oil-water separation [J]. Chemical Industry and Engineering Progress, 2021, 40(5): 2893-2899.
[5]	JING Jiaqiang, HUANG Wanni, SONG Xuehua, LUO Jiaqi, SONG Yang, JI Hui, LUO Qiuhan, WANG Sihan. Design and analysis of novel lubricating element in downhole oil-water separation and lubrication based on Fluent [J]. Chemical Industry and Engineering Progress, 2021, 40(11): 5929-5938.
[6]	Demin CHAI. Filtration factors and ozone treatment effect of oil field waste water containing HPAM [J]. Chemical Industry and Engineering Progress, 2020, 39(S2): 413-420.
[7]	Yang MA, Jiaming WANG, Gaohong HE, Xuehua RUAN. Micro-porous membrane technology for oil-water separation: progress in surface properties and microscopic structures [J]. Chemical Industry and Engineering Progress, 2020, 39(6): 2145-2155.
[8]	Xiaozhen LIU, Tai ZHANG, Changfa XIAO. Research progress on wettability of hydrophobic-oleophylic membranes in oil-water separation [J]. Chemical Industry and Engineering Progress, 2020, 39(11): 4516-4528.
[9]	Bin HUANG, Wei ZHANG, Jie WANG, Cheng FU. Effect of oil displacement agent on oil droplet stability in alkali/surfactant/polymer flooding oily wastewater [J]. Chemical Industry and Engineering Progress, 2019, 38(02): 1053-1061.
[10]	CAO Sijing, PAN Zihe, DU Zhiping, CHENG Fangqin. Fabrication of superhydrophilic/underwater superoleophobic mesh for oil-water separation [J]. Chemical Industry and Engineering Progress, 2018, 37(10): 3744-3750.
[11]	DU Chun’an，PAN Yongqiang，WU Xiaoling. Advances of technologies for offshore oilfield wastewater treatment [J]. Chemical Industry and Engineering Progree, 2012, 31(05): 1149-1153.
[12]	KANG Yong. Analysis on the simulation of hydrocyclone separator by CFD [J]. Chemical Industry and Engineering Progree, 2009, 28(3): 374-.
[13]	ZHOU Zhiling；LI Cunfu；LU Jungang，WANG Xueliang，YAO Yunsheng. Sewage treatment in Cainan oil field [J]. Chemical Industry and Engineering Progree, 2006, 25(12): 1451-.