驱油用聚合物溶液的流变模型应用优化研究

doi:10.13809/j.cnki.cn32-1825/te.2022.04.016

油气藏评价与开发 ›› 2022, Vol. 12 ›› Issue (4): 677-683.doi: 10.13809/j.cnki.cn32-1825/te.2022.04.016

驱油用聚合物溶液的流变模型应用优化研究

朱诗杰^1,³(),叶仲斌^2,³,施雷庭³,宋瑞^3,⁴,徐建根¹,刘哲知^1,³

1.重庆科技学院石油与天然气工程学院,重庆 401331
2.成都工业学院,四川成都 611730
3.西南石油大学油气藏地质与开发工程国家重点实验室,四川成都 610500
4.中海油能源发展股份有限公司工程技术分公司,天津 300452

收稿日期:2021-04-29 出版日期:2022-08-26 发布日期:2022-09-02
作者简介:朱诗杰（1989—）,男,博士,讲师,从事化学驱提高采收率、多孔介质渗流、调剖堵水等方向的研究。地址：重庆市高新区大学城东路20号重庆科技学院,邮政编码：401331。E-mail： zhusj@cqust.edu.cn
基金资助:
重庆市基础研究与前沿探索项目“黏弹性流体动态吸附量与滞留量的量化界定及数学模型表征研究”(cstc2021jcyj-msxmX0522);重庆市基础研究与前沿探索项目“页岩气地层水基钻井液专用热致形状记忆智能封堵剂研制及作用机理”(cstc2020jcyj-msxmX0163);重庆市教育委员会科学技术研究项目“封堵与抑制协同作用的微纳米页岩稳定剂制备及其作用机理”(KJQN202001518)

Application and optimization of rheological model of polymer solution for oil displacement

ZHU Shijie^1,³(),YE Zhongbin^2,³,SHI Leiting³,SONG Rui^3,⁴,XU Jiangen¹,LIU Zhezhi^1,³

1. Chongqing University of Science & Technology, Chongqing 401331, China
2. Chengdu Technological University, Chengdu, Sichuan 611730, China
3. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
4. CNOOC EnerTech-Drilling & Production Co., Tianjin 300452, China

Received:2021-04-29 Online:2022-08-26 Published:2022-09-02

摘要/Abstract

摘要：

流变测试手段的进步推进了研究人员在较广的测试区间内对黏弹性流体的认识。驱油用聚合物溶液呈现“三段式”的流变曲线特征（零剪切段、剪切变稀、极限剪切段）,极其需要一个更为准确的描述模型和限定条件。以部分水解聚丙烯酰胺和疏水缔合聚合物为研究对象,通过分析较广范围（0.01~10 000 s^-1）的流变曲线,结合黏弹性模量变化进行研究。结果表明：在实验条件下,两种聚合物的流变曲线可以用Carreau流变模型进行描述;疏水缔合作用形成的结构黏度,大幅度增强了溶液的弹性作用,使聚合物溶液AP-P4的弹性模量占据主导。考虑弹性特征对流变曲线的影响,应用小幅振荡实验数据推导的松弛时间谱,限制特征松弛时间（λ）的取值范围,最后通过Carreau流变模型的非线性回归拟合曲线高度匹配了实验数据。研究黏弹性溶液流变本构方程时,需充分考虑溶液特性,搭建不同测试参数间的相互关系,建立合理的限制条件,是优化和改进黏弹性流体流变本构方程的有效手段。

关键词: 疏水缔合聚合物, 黏弹性, 流变性, 本构方程, 特征松弛时间

Abstract:

The progress of rheological testing methods has promoted the researchers' understanding of viscoelastic fluids in a wider testing range. The polymer solution used for oil displacement has the characteristics of “Three-stage” rheological curve （zero shear section, shear thinning section, and ultimate shear section）, so a more accurate description model and limiting conditions are extremely needed. Taking partially hydrolyzed polyacrylamide and hydrophobically associating polymer as the research objects, the rheological curves in a wide range （0.01 ~ 10 000 s^-1） have been analyzed, and the changes of viscoelastic modulus have been studied. The results show that under the experimental conditions, the rheological curves of the two polymers can be described by Carreau rheological model. The structural viscosity formed by hydrophobic association greatly enhances the elasticity of the solution, and makes the elastic modulus of the polymer P-P4 dominant. Considering the influence of elastic characteristics on the rheological curve, the relaxation time spectrum derived from the experimental data of small amplitude oscillation is used to limit the characteristic relaxation time（λ）. Finally, the experimental data are highly matched by the nonlinear regression fitting curve of Carreau rheological model. When studying the rheological constitutive equation of viscoelastic solution, it is necessary to fully consider the solution characteristics, establish the relationship between different test parameters, and establish reasonable limiting conditions, which are effective means to optimize and improve the rheological constitutive equation of viscoelastic fluid.

Key words: hydrophobically associating polymer, viscoelasticity, rheological property, constitutive equation, characteristic relaxation time

中图分类号:

TE357

朱诗杰,叶仲斌,施雷庭,宋瑞,徐建根,刘哲知. 驱油用聚合物溶液的流变模型应用优化研究[J]. 油气藏评价与开发, 2022, 12(4): 677-683.

ZHU Shijie,YE Zhongbin,SHI Leiting,SONG Rui,XU Jiangen,LIU Zhezhi. Application and optimization of rheological model of polymer solution for oil displacement[J]. Petroleum Reservoir Evaluation and Development, 2022, 12(4): 677-683.

图/表 10

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表4

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质量分数（%）		HPAM				AP-P4
质量分数（%）		公式		拟合精度		公式		拟合精度
0.10	G^*=0.115 2f ^{0.760 6}		R²=0.997 4		G^*=0.407 1f ^{0.388 6}		R²=0.999 1
0.14	G^*=0.229 8f ^{0.646 5}		R²=0.995 5		G^*=0.522 3f ^{0.241 8}		R²=0.997 2
0.20	G^*=0.395 6f ^{0.520 9}		R²=0.996 6		G^*=0.835 9f ^{0.235 5}		R²=0.994 5
0.25	G^*=0.645 9f ^{0.467 7}		R²=0.997 3		G^*=1.542 7f ^{0.209 2}		R²=0.996 1

类型	质量分数（%）	g（Pa）
类型	质量分数（%）	λ_i=0.01 s	λ_i=0.10 s	λ_i=1 s	λ_i=10 s	λ_i=100 s	λ_i=1 000 s
HPAM	0.10	5.12	0.18	0.10	0.01	5.90×10^-10	5.79×10^-10
	0.14	6.27	0.05	0.21	0.04	1.65×10^-9	1.62×10^-9
	0.20	3.21	0.89	0.28	0.13	4.83×10^-9	4.74×10^-9
	0.25	5.04	1.28	0.46	0.25	1.68×10^-9	1.65×10^-9
AP-P4	0.10	11.89	3.40×10^-7	0.15	0.21	5.49×10^-6	0.03
	0.14	1.46×10^-7	1.04	0.19	0.16	9.38×10^-8	0.20
	0.20	6.06	0.79	0.33	0.42	5.26×10^-6	0.17
	0.25	5.96	0.94	0.60	0.66	3.52×10^-6	0.49

聚合物类型	λ（s）
聚合物类型	质量分数0.10 %	质量分数0.14 %	质量分数0.20 %	质量分数0.25 %
HPAM	λ<0.01	λ<0.01	0.01<λ<0.10	0.01<λ<0.10
AP-P4	0.5<λ<1.0	0.5<λ<1.0	0.5<λ<1.0	0.5<λ<1.0

聚合物	质量分数（%）	μ₀（mPa·s）	μ_inf（mPa·s）	λ（s）	a	n
HPAM	0.10	852.9	4.4	0.002	0.155	-0.250
	0.20	2 499.0	4.8	0.005	0.176	-0.306
	0.25	7 542.9	5.3	0.008	0.152	-0.253
AP-P4	0.10	2 592.9	7.5	0.659	0.466	-0.102
	0.20	3 610.1	8.0	0.767	0.766	0.057
	0.25	4 180.1	9.2	0.906	1.226	0.146

驱油用聚合物溶液的流变模型应用优化研究

Application and optimization of rheological model of polymer solution for oil displacement

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