弱凝胶调驱体系性能评价研究

doi:10.3969/j.issn.1001-1803.2019.02.005

摘要/Abstract

摘要：

针对具有储层非均质性强、渗透率低和孔隙结构复杂特点的储层,在注水开发后期,含水率急剧上升,普通的水驱和聚驱方法很难将油驱替出。复合离子型聚合物凝胶有很好的储层适应性,与注入污水配伍性好,成胶时间可控,吸附、滞留能力强,抗冲刷性好。其注入能力强,波及范围大,既可以封堵储层大孔道（"调"的作用）,又可以驱替储层剩余油（"驱"的作用）,能够满足调驱体系大剂量注入的要求。本文针对复合离子型凝胶调驱体系进行配方优选并进行性能评价实验,实验结果表明,该调驱体系具有较好的抗盐性、抗剪切性、热稳定性和黏弹性。

关键词: 两性离子型聚合物, 调驱体系, 抗盐性, 抗剪切性, 热稳定性, 黏弹性

Abstract:

For reservoirs with high heterogeneity, low permeability and complex pore structure, the water cut sharply increases in the late-stage development by water injection, and ordinary water flooding and polymer flooding methods are difficult to obtain oil. In contrast, the composite ionic polymer gel has good reservoir adaptability, good compatibility with injected sewage, controllable gelation time, strong adsorption and retention capacity, and good resistance to erosion. Its strong injection ability and wide spread range can not only seal the large pores of the reservoir （namely "profile-controlling"）, but also can drive the remaining oil in the reservoir （namely "flooding"）, and thus can meet the requirements of large-dose injection of the profile-controlling and flooding system. In this paper, formula optimization and performance evaluation were both carried out for the profile-controlling and flooding system based on composite ionic gel. The experimental results show that the system has good salt resistance, shear resistance, thermal stability and viscoelasticity.

Key words: zwitterionic polymer, profile-controlling and flooding system, salt resistance, shear resistance, thermal stability, viscoelasticity

中图分类号:

TQ317

张继红,冯建祎. 弱凝胶调驱体系性能评价研究[J]. 日用化学工业, 2019, 49(2): 87-91.

Ji-hong ZHANG,Jian-yi FENG. Evaluation of the performance of weak-gel profile-controlling and flooding system[J]. China Surfactant Detergent & Cosmetics, 2019, 49(2): 87-91.

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ρ（聚合物）/（g·L^-1）	成胶时间/h	成胶强度/（mPa·s）	η/（mPa·s）
ρ（聚合物）/（g·L^-1）	成胶时间/h	成胶强度/（mPa·s）	0 d	1 d	2 d	5 d	10 d	15 d
0.6	14	1 020	5.2	2 693	4 076	9 381	8 952	8 550
0.7	13	1 229	5.6	3 129	4 608	10 217	9 847	9 643
0.8	11	1 403	6.3	3 395	5 057	11 204	10 720	10 327
0.9	10	1 424	6.6	3 976	5 637	11 518	11 208	10 831
1.0	9.5	1 443	7.2	4 423	6 211	11 804	11 584	11 059

ρ（交联剂）/（g·L^-1）	成胶时间/h	成胶强度/（mPa·s）	η/（mPa·s）
ρ（交联剂）/（g·L^-1）	成胶时间/h	成胶强度/（mPa·s）	0 d	1 d	2 d	5 d	10 d	15 d
1.6	13	1 352	5.5	3 157	4 662	9 850	9 626	9 453
1.8	11	1 403	6.3	3 468	5 057	11 626	11 423	10 821
2.0	9.5	1 546	7.6	3 871	5 437	12 592	12 242	11 829

ρ（稳定剂）/（g·L^-1）	成胶时间/h	成胶强度/（mPa·s）	η/（mPa·s）
ρ（稳定剂）/（g·L^-1）	成胶时间/h	成胶强度/（mPa·s）	0 d	1 d	2 d	5 d	10 d	15 d
0.2	13	1 308	5.8	3 207	4 723	11 184	10 853	10 343
0.3	11	1 353	6.3	3 468	5 057	11 317	11 020	10 527
0.4	10	1 408	7.2	3 704	5 329	11 526	11 339	10 958

t/d	η/（mPa·s）
0	6
5	11 667
10	11 558
30	10 218
60	8 917
90	8 705