Study on the Flow and Oil Displacement Characteristics of Associating Polymers of Different Molecules under Conditions with Different Permeabilities and Max-to-Min Permeability Ratios

Xinjiang Oil & Gas ›› 2021, Vol. 17 ›› Issue (3): 44-52.

• OIL AND GAS DEVELOPMENT • Previous Articles Next Articles

Study on the Flow and Oil Displacement Characteristics of Associating Polymers of Different Molecules under Conditions with Different Permeabilities and Max-to-Min Permeability Ratios

LIANG Yan^1,2, WANG Yi³, ZHANG Xinmin^1,4, CAO Miao⁴, HU Jun⁴, ZHANG Wei⁴, LUO Pingya¹, GUO Yongjun^1,2,4

1. State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,Sichuan,China;
2. School of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,Sichuan,China;
3. Research Institute of Exploration and Development,Sinopec Shengli Oilfield Company,Dongying 257015,Shandong,China;
4. Sichuan Guangya Polymer Chemical Co.,Ltd.,Nanchong 637900,Sichuan,China

Online:2021-09-10 Published:2021-09-10

不同渗透率及渗透率极差下不同分子缔合聚合物的渗流驱替特征研究

梁严^1,2, 王毅³, 张新民^1,4, 曹苗⁴, 胡俊⁴, 张伟⁴, 罗平亚¹, 郭拥军^1,2,4

1.西南石油大学油气藏地质及开发工程国家重点实验室,四川成都 610500;
2.西南石油大学化学化工学院,四川成都 610500;
3.中国石油化工股份有限公司胜利油田分公司勘探开发研究院,山东东营 257015;
4.四川光亚聚合物化工有限公司,四川南充 637900

通讯作者: 郭拥军（1973-）,1999年毕业于西南石油大学化学化工学院应用化学专业,博士,研究员,目前从事油田功能化学剂研究及化学驱提高采收率技术研究工作。（Tel）13990868622（E-mail） gyfzgyj@126.com
作者简介:梁严（1988-）,在读博士研究生,目前从事化学驱渗流驱替物理模拟及提高采收率技术研究。（Tel）13666142817（E-mail）gyfzly@126.com

Abstract

Abstract: By establishing a long sand-packing model with satisfactory reproducibility for porosity, permeability parameters and sand-packing stability, the flow characteristics and oil displacement effect of associating polymers with different hydrophobe contents at a similar shear viscosity were investigated under conditions with different permeabilities and max-to-min permeability ratios. The results show that, in the permeability range of 0.55~6.93 μm², the polymer without hydrophobes (DM-0) always exhibits an identical "equal resistance" pattern; while the associating polymers DM-1~DM-3 respectively demonstrates a flow pattern of "equal resistance" and "increasing resistance" before and after a certain critical permeability, and the critical permeability notably increases with increasing hydrophobe content. Moreover, the combination pattern of "increasing resistance + increasing resistance" can achieve the best oil displacement effect, and the higher hydrophobe content the greater max-to-min permeability ratio. The synergetic oil displacement of associating polymers with different flow patterns can provide important technical reference for heterogeneous reservoirs to enhance recovery factor significantly.

Key words: associating polymer, similar shear viscosity, flow pattern, oil displacement characteristics, heterogeneity adjustment

摘要： 通过建立具有良好孔渗参数重现性和稳定性的长填砂模型,在不同渗透率和渗透率极差下考察了不同疏水基含量缔合聚合物在相近剪切粘度下的渗流特性及驱油效果。结果表明,在0.55~6.93 μm²的渗透率范围内,不包含疏水基的DM-0均表现出“等阻”的渗流模式,而缔合聚合物DM-1~DM-3均在一定临界渗透率前后分别表现出“等阻”和“增阻”的渗流模式,且该临界渗透率随疏水基含量增加而明显增大。同时,不同渗透率极差下以“增阻+增阻”模式的组合可获得最好的驱油效果且“增阻”模式越强可适应的渗透率极差越大。通过缔合聚合物不同渗流模式的协同驱油可为非均质油藏显著提高采收率提供重要技术借鉴。

关键词: 缔合聚合物, 相近剪切粘度, 渗流模式, 驱替特征, 非均质性调控

CLC Number:

TE357

LIANG Yan, WANG Yi, ZHANG Xinmin, CAO Miao, HU Jun, ZHANG Wei, LUO Pingya, GUO Yongjun. Study on the Flow and Oil Displacement Characteristics of Associating Polymers of Different Molecules under Conditions with Different Permeabilities and Max-to-Min Permeability Ratios[J]. Xinjiang Oil & Gas, 2021, 17(3): 44-52.

梁严, 王毅, 张新民, 曹苗, 胡俊, 张伟, 罗平亚, 郭拥军. 不同渗透率及渗透率极差下不同分子缔合聚合物的渗流驱替特征研究[J]. 新疆石油天然气, 2021, 17(3): 44-52.

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Study on the Flow and Oil Displacement Characteristics of Associating Polymers of Different Molecules under Conditions with Different Permeabilities and Max-to-Min Permeability Ratios

不同渗透率及渗透率极差下不同分子缔合聚合物的渗流驱替特征研究

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