非均质条件下聚合物微球/聚合物深部调驱实验研究

摘要/Abstract

摘要：

首先对聚合物微球和聚合物性能进行了评价。其次,通过微孔膜过滤装置研究了微球、聚合物及复合体系（微球+聚合物）的运移与封堵性能;利用双并联岩心物理模拟驱替装置,开展上述体系调驱实验。研究结果表明,微球形貌为圆球状,分散性好,粒径为微米级。在较高的剪切速率下,微球体系的表观黏度与水的黏度接近,远小于相同质量浓度的聚合物体系。聚合物未能对微孔实现高效封堵,微球的封堵能力最强,复合体系其次。在较强非均质条件下,复合体系调驱效果最好,所对应的高、低渗岩心采收率分别提高20.86 %和36.89 %。复合体系中微球和聚合物具有较好的协同作用,由于聚合物的携带和润滑作用,使得微球在多孔介质中的滞留减少及运移性增强,更有利于实现深部调驱。此外,聚合物的流度控制和黏弹性驱油作用也能有效提高采收率。在较强非均质油藏条件下,可优先考虑微球/聚合物复合体系调驱技术。

关键词: 聚合物微球, 聚合物, 复合体系, 调驱, 非均质条件

Abstract:

Firstly, we evaluated the polymer microspheres and polymer properties, then, studied the migration and plugging properties of the microspheres, polymer and compound system（microspheres + polymer） by microporous membrane filtration device, and implemented the profile control and oil displacement experiments about the systems above by the parallel cores physical simulation displacement apparatus. The results indicated that the polymer microspheres was spherical micron-grade particles with superior dispersibility, and its apparent viscosity, which was much less than that of polymer with the same mass concentration, is close to that of water under the relatively high shear rate. The polymer failed to plug the micropores effectively. The plugging ability of the microspheres was the strongest, followed by the compound system. Under the condition of the strong heterogeneity, the effects of the profile control and the oil displacement of the compound system attained the best and corresponding enhanced oil recovery for high and low permeable cores were respectively 20.86 % and 36.89 %. There was a synergistic effect between the microspheres and polymer for the compound system. That the amount of the microspheres captured and migration property reduced and intensified in the porous medium mainly due to the impact of carrying and lubrication of polymer. Additionally, the influence of mobility ratio control and viscoelastic oil displacement of polymer could effectively improve oil recovery. For the actual reservoirs with relatively strong heterogeneous conditions, it was essential to take the profile control and flooding technology of the microspheres/polymer compound system into account firstly.

Key words: polymer microspheres, polymer, compound system, profile control and oil displacement, heterogeneous condition

中图分类号:

TE357

蒲万芬,赵帅,梅子来等. 非均质条件下聚合物微球/聚合物深部调驱实验研究[J]. 油气藏评价与开发, 2018, 8(3): 61-65.

Wanfen Pu,Shuai Zhao,Zilai Mei, et al. Experimental study on profile control and oil displacement of polymer microspheres/polymer under heterogeneous conditions[J]. Reservoir Evaluation and Development, 2018, 8(3): 61-65.

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参考文献 15

[1]	刘宝珺, 谢俊, 张金亮 . 我国剩余油技术研究现状与进展[J]. 西北地质, 2004,37(4):1-6.
[2]	Hua Z, Lin M, Dong Z , et al. Study of deep profile control and oil displacement technologies with nanoscale polymer microspheres[J]. Journal of Colloid and Interface Science, 2014,42(4):67-74. doi: 10.1016/j.jcis.2014.03.019 pmid: 24767500
[3]	Yao C, Lei G, Gao X , et al. Controllable preparation, rheology, and plugging property of micron-grade polyacrylamide microspheres as a novel profile control and flooding agent[J]. Journal of Applied Polymer Science, 2013,130(2):1124-1130. doi: 10.1002/app.39283
[4]	孙焕泉, 王涛, 肖建洪 , 等. 新型聚合物微球逐级深部调剖技术[J]. 油气地质与采收率, 2006,13(4):77-79. doi: 10.3969/j.issn.1009-9603.2006.04.024
[5]	Yao C, Lei G, Li L , et al. Selectivity of pore-scale elastic microspheres as a novel profile control and oil displacement agent[J]. Energy & Fuels, 2012,26(8):5092-5101. doi: 10.1021/ef300689c
[6]	胡勇 . 交联聚合物性能及调驱机理研究[D]. 大庆:大庆石油学院, 2005.
[7]	红兵 . 杏北非主力油层聚合物驱适应性及调剖研究[D]. 大庆:大庆石油学院, 2006.
[8]	蒲万芬, 赵帅, 袁成东 , 等. 耐温抗盐聚合物微球/表面活性剂交替段塞调驱实验研究[J]. 油气藏评价与开发, 2016,6(4):69-73.
[9]	王涛, 肖建洪, 孙焕泉 , 等. 聚合物微球的粒径影响因素及封堵特性[J]. 油气地质与采收率, 2006,13(4):80-82.
[10]	Hua Z, Lin M, Guo J , et al. Study on plugging performance of cross-linked polymer microspheres with reservoir pores[J]. Journal of Petroleum Science and Engineering, 2013,105(1):70-75. doi: 10.1016/j.petrol.2013.03.008
[11]	姜维东, 张健, 唐晓东 . 渤海油田驱油用聚合物线团尺寸与岩石孔喉配伍性研究[J]. 油田化学, 2012,29(4):446-451.
[12]	林梅钦, 董朝霞, 韩飞雪 , 等. 核微孔滤膜评价交联聚合物线团大小的研究[J]. 膜科学与技术, 2005,25(2):42-45. doi: 10.3969/j.issn.1007-8924.2005.02.010
[13]	Lin M, Zhang G, Hua Z , et al. Conformation and plugging properties of crosslinked polymer microspheres for profile control[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2015,477:49-54. doi: 10.1016/j.colsurfa.2015.03.042
[14]	王立军 . 聚合物溶液黏弹性对提高驱油效率的作用[D]. 大庆:大庆石油学院, 2003.
[15]	孙玉丽, 钱晓琳, 吴文辉 . 聚合物驱油技术的研究进展[J]. 精细石油化工进展, 2006,7(2):26-29. doi: 10.3969/j.issn.1009-8348.2006.02.008

离子	浓度	总矿化度
K⁺、Na⁺	9 390	25 036
Ca²⁺	296	25 036
Mg²⁺	15	25 036
SO₄^2-	492	25 036
HCO₃^-	397	25 036
Cl^-	14 446	25 036

岩心编号	长度/ cm	直径/ cm	水测渗透率/ 10^-3μm²	渗透率级差,f	孔隙度, %	含油饱和度,%
1	6.984	3.812	501.32	9.81	18.59	71.19
2	7.054	3.798	51.08	9.81	14.39	52.17
3	6.996	3.814	498.65	9.94	18.61	70.52
4	7.064	3.806	50.16	9.94	14.93	52.46
5	6.998	3.808	500.62	9.86	18.12	70.64
6	7.056	3.826	50.78	9.86	14.24	52.81

实验方案	岩心编号	水驱采收率	化学驱提高采收率	后续水驱提高采收率	总提高采收率
①	1	54.67	4.21	6.93	11.14
①	2	0	0	0	0
②	3	54.75	6.5	7.6	14.1
②	4	0	10	9.83	19.83
③	5	55.03	8.54	12.31	20.85
③	6	0	1.64	35.25	36.89