Page 216 - 《精细化工》2023年第9期
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第 40 卷第 9 期 精 细 化 工 Vol.40, No.9
2 023 年 9 月 FINE CHEMICALS Sept. 2023
油田化学品与油品添加剂
用于中低渗油藏的表面活性聚合物驱油剂
胡 俊 1,2 ,金 诚 2,3 ,施雷庭 1,2* ,郭拥军 2,4
(1. 西南石油大学 石油与天然气工程学院,四川 成都 610500;2. 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;3. 西南石油大学 新能源与材料学院,四川 成都 610500;4. 四
川光亚聚合物化工有限公司,四川 成都 610500)
摘要:以表面活性单体 N-十六烷基-N-磺基丙烯酰胺(NS)、丙烯酰胺(AM)为原料,采用水溶液自由基聚合
法制备了低相对分子质量的表面活性聚合物(PAS)。利用 FTIR 对其进行了结构表征,考察了 PAS 作为驱油剂
的增黏、乳化、注入、提高采收率相关性能。在 45 ℃、NaCl 矿化度为 2410 mg/L 条件下,质量浓度为 1000 mg/L
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的 PAS 溶液表观黏度为 32.6 mPa·s,高于相对分子质量为 8.0×10 的部分水解聚丙烯酰胺(HPAM,18.9 mPa·s);
在 PAS 质量浓度为 1000 mg/L 的条件下,其与原油形成的乳液 120 min 析水率为 5.0%,3 次吸附后表观黏度保
2
留率为 114.11%,吸附后仍具有较好的乳化性;在渗透率为 0.025 μm 的岩心中注入平稳压力为 1.02 MPa;在岩
2
心渗透率为 0.1 μm 的条件下,PAS 驱能在水驱基础上提高采收率 19.02%,比 HPAM 驱高 5.00%,与 HPAM-
碳酸钠-石油磺酸钠三元体系提高采收率相当,仅低 0.58%。
关键词:表面活性聚合物;中低渗油藏;聚丙烯酰胺;乳化性能;提高采收率;油田化学品
中图分类号:TQ317;TE357 文献标识码:A 文章编号:1003-5214 (2023) 09-2064-09
Surface active-polymer flooding agent for medium and
low permeability reservoir
1,2
2,4
2,3
HU Jun , JIN Cheng , SHI Leiting 1,2* , GUO Yongjun
(1. Petroleum Engineering School, Southwest Petroleum University, Chengdu 610500, Sichuan, China; 2. State Key
Laboratory of Oil and Gas Reservoir Geology and Development Engineering, Southwest Petroleum University, Chengdu
610500, Sichuan, China; 3. School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500,
Sichuan, China; 4. Sichuan Guangya Polymer Chemical Co., Ltd., Chengdu 610500, Sichuan, China)
Abstract: Surfactant-polymer (PAS) with relative low molecular mass was prepared from free radical
polymerization of surfactant monomer N-hexadecyl-N-sulfoacrylamide (NS) and acrylamide (AM),
characterized by FTIR, and was investigated as an oil displacement agent for analysis on the related
properties such as viscosity increase, emulsification, injection and enhanced oil recovery. At 45 ℃ and
NaCl degree of mineralization of 2410 mg/L, PAS solution with a mass concentration of 1000 mg/L
displayed an apparent viscosity of 32.6 mPa·s, which was higher than that of partially hydrolyzed
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polyacrylamide (HPAM) with a relative molecular mass of 8.0×10 (18.9 mPa·s). Meanwhile, the water
dissolution rate of emulsion formed from PAS and crude oil was 5.0% in 120 min, and the apparent
viscosity retention rate after three adsorptions was 114.11%, showing good emulsification capacity after
adsorption. The stable injection pressure was 1.02 MPa at the standstone core with a permeability of 0.025
2
2
μm . When the core permeability was 0.1 μm , PAS flooding improved oil recovery by 19.02% over water
flooding, 5.00% over flooding by HPAM flooding and comparable to flooding by HPAM-sodium
carbonate-sodium petroleum sulfonate system, only 0.58% lower.
Key words: surface active polymers; medium and low permeability reservoir; polyacrylamide; emulsifying
property; enhanced oil recovery; oil field chemicals
收稿日期:2022-11-20; 定用日期:2023-04-07; DOI: 10.13550/j.jxhg.20221047
作者简介:胡 俊(1993—),男,硕士生,E-mail:549163532@qq.com。联系人:施雷庭(1976—),男,教授,E-mail:slting@swpu.edu.cn。