表活聚合物驱采出污水稳定性分析

doi:10.16085/j.issn.1000-6613.2018-0194

摘要/Abstract

摘要： 目前油田聚合物驱主要研究的是提高采收率和驱油机理，在采出污水稳定性方向少有报道。为了解决这一问题，本文针对一种表活聚合物（活化剂）对采出污水稳定性的影响进行了研究。首先通过测量离心后污水的吸光度研究了未处理、剪切水解前和剪切水解后3种状态的活化剂对模拟采出污水稳定性的影响，接着用zeta电位仪、分配系数实验和双偏振光极化干涉测量分析仪（DPI）测试评价了模拟采出污水中油滴之间的静电相互作用和空间位阻效应，用界面参数一体测量系统测试和评价了活化剂对油水界面的界面张力、弹性模量、黏弹性模量和扩张模量的影响。实验结果表明，模拟活化剂驱采出污水稳定性低于模拟水驱采出污水稳定性；当污水中存在活化剂时，污水中油滴间的静电作用、扩张模量和弹性模量下降，从而降低了采出污水稳定性，且分子量的大小对此结果无影响，但活化剂水解度增大后，采出污水稳定性降低则是因静电作用和粘性模量的降低。当污水中已存在活化剂时，随着活化剂浓度增加，污水稳定性增强，主要是因为油水界面膜强度增强，界面张力降低。

关键词: 表活聚合物驱, 采出污水, 稳定性

Abstract: Research of polymer flooding was mainly about the recovery rate and oil displacement mechanism, but not the stability of produced wastewater. To solve this problem, the effect of a surface-active polymer(activating agent) on the stability of oily wastewater produced from activating agent flooding was studied. Firstly, the effects of three activating agents including untreated, sheared, sheared and hydrolyzed activating agent on the stability of simulated oily wastewater were studied by measuring the absorbance of oily wastewater after centrifugation. Then, zeta potential analyzer, distribution coefficient experiments and dual polarized light polarization interferometry analyzer (DPI) were used to measure the electrostatic interaction and steric hindrance effect among the oil droplets in simulated oily wastewater. Effect of activating agent on interfacial tension, modulus of elasticity, viscoelastic modulus and dilatation modulus were also tested by an integrated measurement system of interface parameters. The results showed that stability of simulated oily wastewater produced from activating agent flooding was lower than that from water flooding. When there was an activating agent in the oily wastewater, static effect, dilatation modulus and elasticity modulus decreased, thus the stability of the oily waste water was reduced. The molecular weight has no effect on this result. However, the reason of decreasing stability of oily wastewater caused by the increase of degree of hydrolysis of activating agent was that the static effect and viscous modulus decreased. When the activating agent already existed in wastewater and activating agent concentration increased, stability of oily wastewater could be enhanced mainly because of enhanced interfacial film strength and decreased interfacial tension.

Key words: surface-active polymer flooding, oily wastewater, stability

中图分类号:

TE39

岑驰, 朱莹, 段明. 表活聚合物驱采出污水稳定性分析[J]. 化工进展, 2018, 37(10): 4074-4079.

CEN Chi, ZHU Ying, DUAN Ming. Stability analysis of oily wastewater produced from surface-active polymer flooding[J]. Chemical Industry and Engineering Progress, 2018, 37(10): 4074-4079.

参考文献

[1] CHEN H X, TANG H M, GONG Xi P, et al. Effect of partially hydrolyzed polyacrylamide on emulsification stability of wastewater produced from polymer flooding[J]. Journal of Petroleum Science & Engineering, 2015, 133:431-439.
[2] 陈文娟, 靖波, 檀国荣, 等.海上油田含聚污水处理工艺优化研究[J]. 工业水处理, 2016, 36(10):80-83. CHEN W J, JING B, TAN G R, et al. Research on the optimization of polymer-bearing wastewater treatment process in offshore oilfields[J]. Industrial Water Treatment, 2016, 36(10):80-83.
[3] KOH H, LEE V B, POPE G A. Experimental investigation of the effect of polymers on residual oil saturation[C]//SPE IMPROVED OIL RECOVERY CONFERENCE, 2015.
[4] 杨光, 张健, 王金本, 等. 两亲聚合物驱油剂APVR溶液性能研究[J]. 西安石油大学学报(自然科学版), 2013, 28(6):86-89. YANG G, ZHANG J, WANG J B, et al. Study on properties of amphiphlic polymer oil displacement agent APVR solution[J]. Journal of Xi'an Shiyou University(Natural Science Edition), 2013, 28(6):86-89.
[5] 姜维东, 张健, 周薇. 渤海油田聚合物驱油剂性能特征评价实验研究[J].中国海上油气, 2012, 24(2):39-43. JIANG W D, ZHANG J, ZHOU W. An experiment evaluation of properties of polymer oil-displacement agents in Bohai oilfields[J]. China Offshore Oil & Gas, 2012, 24(2):39-43.
[6] 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. XIA F J, GUO S J, XU D H, et al. Treatment technology three oil production water in Daqing oilfield[J]. Environmental Protection of Oil & Gas Fields, 2017, 27(2):34-37.
[7] 杨光, 赵娟, 王金本, 等. 稠油活化剂研制及其驱油机理研究[C]//全国油气田化学品开发应用研讨会, 2015. YANG G, ZHAO J, WANG J B, et al. Development and oil displacement mechanism of heavy oil actvating agent[C]//Chinese Oil & Gas Field Chemical Development and Application Symposium, 2015.
[8] 徐晓慧, 张健, 杨光, 等.稠油活化剂的开发利用[J].石油科技论坛, 2014, 33(3):16-19. XU X H, ZHANG J, YANG G, et al. Development and application of heavy oil activating agent[J]. Oil Forum, 2014, 33(3):16-19.
[9] 赵娟, 张健, 杨光, 等. 两亲聚合物稠油活化剂的降黏效果及驱油性能研究[J]. 油田化学, 2016, 33(4):715-719. ZHAO J, ZHANG J, YANG G, et al. Oil displacement performance and viscosity-reducing effect of heavy oil activator with amphiphilic polymer[J]. Oilfield Chemistry, 2016, 33(4):715-719.
[10] 赵方园, 姚峰, 王晓春, 等. 新型表面活性聚合物驱油剂室内性能研究[J]. 石油化工, 2017(8):1043-1048. ZHAO F Y, YAO F, WANG X C, et al. Laboratory study on properties of novel surface active polymer flooding agent[J]. Petrochemical Technology, 2017(8):1043-1048.
[11] 刘平德, 张松, 杨宁, 等. 新型表面活性聚合物驱油剂[J]. 石油勘探与开发, 2012, 39(5):580-584. LIU D P, ZHANG S, YANG N, et al. A novel surface active polymer oil displacement agent[J]. Petroleum Exploration and Development, 2012, 39(5):580-584.
[12] 刘磊, 李沼萱, 胡洋, 等.国内外驱油聚合物研究进展[J].现代化工, 2014, 34(12):37-40. LIU L, LI Z X, HU Y, et al. Development of polymer flooding treatment[J]. Modern Chemical Industry, 2014, 34(12):37-40.
[13] 李星蓉, 佟乐, 王璐, 等. 聚合物驱油技术综述[J]. 当代化工, 2017, 46(6):1228-1230. LI X R, TONG L, WANG L, et al. Review of polymer flooding technology[J]. Contemporary Chemical Industry, 2017, 46(6):1228-1230.
[14] 严志虎, 寇磊, 姬洪明.聚合物驱提高采收率研究[J]. 辽宁化工, 2010, 39(9):945-947. YAN Z H, KOU L, JI H M. Study on enhanced oil recovery by polymer flooding[J]. Liaoning Chemical Industry, 2010, 39(9):945-947.
[15] 任志华. 聚合物驱采出液稳定性研究[D]. 青岛:中国石油大学(华东), 2014. REN Z H. Studies on stability of polymer-flooding produced water[D]. Qingdao:China University of Petroleum, 2014.
[16] 翟磊, 王秀军, 靖波, 等.双亲型清水剂处理油田含聚污水[J]. 化工环保, 2016, 36(1):5-10. ZHAI L, WANG X J, JING B, et al. Treatment of polymer-containing oilfield wastewater using amphipathic water clarifier[J]. Environmental Protection of Chemical Industry, 2016, 36(1):5-10.
[17] 翟磊, 王秀军, 靖波, 等.不同类型清水剂处理油田含聚污水的效果对比[J]. 化工环保, 2016, 36(2):124-130. ZHAI L, WANG X J, JING B, et al. Comparison of different types of water clarifiers on treatment of polymer-containing oilfield wastewater[J]. Environmental Protection of Chemical Industry, 2016, 36(2):124-130.