分散聚合法制备聚丙烯酰胺降滤失剂的研究

杨丽丽; 刘瀚卿; 敖天; 蒋官澄; 王爱佳

doi:10.12358/j.issn.1001-5620.2022.02.005

分散聚合法制备聚丙烯酰胺降滤失剂的研究

doi: 10.12358/j.issn.1001-5620.2022.02.005

中国石油大学（北京）石油工程教育部重点实验室，北京102249

基金项目: 国家自然基金面上项目“聚合物拓扑结构和序列结构影响其流变调节能力的机理及结构优化研究”（51874329）

详细信息

作者简介:
杨丽丽，副教授，博士生导师，主要从事油气井化学与工程、油气层损害与保护等方面的教学和科研工作。E-mail：yangll@cup.edu.cn

中图分类号: TE254.4
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- 被引次数: 0
出版历程
- 收稿日期: 2021-09-29
- 修回日期: 2021-11-10
- 录用日期: 2021-08-29
- 刊出日期: 2022-06-23

Study and Application of Dispersion Polymerization in Preparing PAM Filter Loss Reducer

MOE Key Laboratory of Petroleum Engineering, China University of Petroleum （Beijing）, Beijing 102249

摘要

摘要: 以丙烯酰胺为单体，通过分散聚合法制备了一种聚丙烯酰胺微球降滤失剂，并与水溶液聚合法、反相乳液聚合法分别合成的聚丙烯酰胺降滤失剂进行了对比。通过优化引发剂加量等方法，合成了可溶解的聚丙烯酰胺微球降滤失剂FA-25。该方法合成过程无毒、环保，无需进行后处理。通过透射电镜分析、热重分析、粒径分析、凝胶色谱法分子量分析等手段，对FA-25进行了结构表征研究，结果表明FA-25为球形，尺寸在40～200 nm范围内，分子量可以达到104 928，初始热分解温度200 ℃。在膨润土浆中加入1% FA-25后能够将中压滤失量降至13.8 mL，优于水溶液合成的产品及反相乳液法制备的产品。此外，产品抗温性能良好，可以抵抗200 ℃的高温，具有良好的应用前景。
- 微球 /
- 降滤失剂 /
- 聚丙烯酰胺
Abstract: A microsphere polyacrylamide (PAM) filter loss reducer FA-25 has been developed with acrylamide monomer through dispersion polymerization. The filtration control performance of FA-25 and other PAMs made through aqueous polymerization and inverse emulsion polymerization was compared. The dispersion polymerization is nontoxic and environmentally friendly, and the product does not need any post-treatment. The product FA-25 was characterized through TEM analysis, TG analysis, particle size analysis and molecular weight analysis through gel chromatography. It was proved that the particles of FA-25 are in a shape of sphere, with particle sizes between 40 nm and 200 nm. The molecular weight of FA-25 is 104,928, and the initial thermal decomposition temperature is 200 ℃. A bentonite slurry treated with 1% FA-25 had its API filtration rate reduced to 13.8 mL, this proves that FA-25 has filtration control performance better than the PAMs made through water solution polymerization and inverse emulsion polymerization. FA-25 functions normally at temperatures up to 200 ℃. Good performance of FA-25 renders it good application prospect.
- Microballoon /
- Filtrate reducer /
- Polyacrylamide

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图 1 引发剂加量对产品降滤失性的影响

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图 2 聚合物微球的透射电镜图

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图 3 FA-25聚合物的色谱和校准曲线

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图 4 水溶液聚合法产品的色谱和校准曲线

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图 5 3种聚合物的热重分析曲线

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图 6 FA-25聚合物的粒径分析曲线

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表 1 加入不同产品的膨润土浆200 ℃老化前后的性能

实验方案	实验条件	φ₆₀₀	φ₃₀₀	PV/ mPa·s	YP/ Pa	YP/PV/ Pa/(mPa·s)	FL_API/ mL
水溶液聚合	老化前	240	213	27	95.05	3.52	12.2
水溶液聚合	老化后	14	9	5	2.04	0.41	15.6
分散聚合	老化前	128	83	45	19.42	0.43	8.4
分散聚合	老化后	31	20	11	4.60	0.42	13.8
反相乳液聚合	老化前	29	25	4	10.73	2.68	22.8
反相乳液聚合	老化后	10	5	5	0	0	25.0
注：膨润土浆中加入的不同产品的有效含量浓度均为1%

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表 2 不同含量FA-25的膨润土浆在200 ℃老化前后性能

FA-25有效含量/%	反应条件	φ₆₀₀	PV/ mPa·s	YP/ Pa	YP/PV/ Pa/(mPa·s)	FL_API/ mL
0.25	老化前	118	33	26.5720	0.8052	16.0
0.25	老化后	30	12	3.0660	0.2555	18.0
0.50	老化前	125	36	27.0830	0.7523	15.0
0.50	老化后	26	10	3.0660	0.3066	17.6
0.75	老化前	131	39	27.0830	0.6944	12.0
0.75	老化后	25	10	2.5550	0.2555	16.8
1.00	老化前	136	46	22.4840	0.4888	8.4
1.00	老化后	31	11	4.5990	0.4181	13.8
1.25	老化前	142	48	23.5060	0.4897	8.0
1.25	老化后	38	14	5.1100	0.3650	13.4
1.50	老化前	156	49	29.6380	0.6049	8.2
1.50	老化后	40	11	9.1980	0.8362	13.6

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表 3 加入1%FA-25的膨润土浆在老化前后的性能

T_老化/ ℃	φ₆₀₀	φ₃₀₀	PV/ mPa·s	YP/ Pa	YP/PV/ Pa/(mPa·s)	FL_API/ mL
150	62	36	26	5.1100	0.1965	9.2
180	32	23	9	7.1540	0.7949	11.6
200	31	20	11	4.5990	0.4181	13.8
220	25	14	11	1.5330	0.1394	19.2

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