高效嘧啶衍生物酸化缓蚀剂的研制与表征

夏玉磊; 兰建平; 姚伟

doi:10.12358/j.issn.1001-5620.2023.06.018

高效嘧啶衍生物酸化缓蚀剂的研制与表征

doi: 10.12358/j.issn.1001-5620.2023.06.018

夏玉磊^{1, 2,},
兰建平^{1, 2},
姚伟¹

1.
中国石油集团川庆钻探工程有限公司长庆井下技术作业公司, 西安 710018
2.
中国石油集团油气藏改造重点实验室—二氧化碳压裂增产研究室, 西安 710018

基金项目: 国家重大科技专项“山地页岩气井优快钻完井技术现场试验与应用”（2017ZX05063- 003）。

详细信息

作者简介:
夏玉磊，高级工程师，博士研究生，现在主要从事油气田开发专业压裂酸化及试油（气）工作。E-mail：xiayl@cnpc.com.cn。

中图分类号: TE357.12
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- 被引次数: 0
出版历程
- 收稿日期: 2023-07-10
- 修回日期: 2023-08-22
- 刊出日期: 2023-12-30

The Development and Characterization of a High Efficiency Pyrimidine Derivatives Corrosion Inhibitor for Acid Jobs

XIA Yulei^{1, 2
,},
LAN Jianping^{1, 2},
YAO Wei¹

1.
Changqing Downhole Technology Company, Chuanqing Drilling Engineering Co.Ltd, CNPC, Xi’an, Shaanxi 710018
2.
Department of CO₂ Fracturing Stimulation, Key Laboratory of Reservoir Stimulation, CNPC, Xi’an, Shaanxi 710018

摘要

摘要: 采用绿色嘧啶生物材料4-氨基-6-羟基-2-巯基嘧啶（AMSN）和无水N，N-二甲基甲酰胺（DMF）,一步合成了高效嘧啶衍生物酸化缓蚀剂ASMF，红外光谱表征及元素分析结果表明其合成纯度较高。通过研究其合成过程中影响ASMF产率的因素发现：AMSN和DMF的物质的量之比的水平宜选为1∶1，反应温度不宜高于170 ℃，反应时间至少要有4 h，ASMF可获得较高产率。通过中试生产高效嘧啶衍生物酸化缓蚀剂ASMF，并研究其缓蚀性能，与市售生物缓蚀剂相比，中试产品嘧啶衍生物酸化缓蚀剂ASMF在高浓度酸液（>20%）中仍有优秀的缓蚀性能，其耐温能达170 ℃，添加量低于0.2%时，缓蚀剂ASMF仍能表现出优异的缓蚀性能。ASMF电化学极化曲线结果表明，缓蚀剂ASMF能有效地抑制腐蚀过程中阴极和阳极过程的电极反应，是偏阴极抑制的混合型缓蚀剂；阻抗结果表明，ASMF具有良好的缓蚀性能，其在添加量为0.2%时，其缓蚀效率可达99.85%，具有高效的缓蚀效率；岩心损害评价表明，缓蚀剂ASMF的岩心伤害性能属于弱伤害，对环境友好。综上认为所研制的产品为绿色高效嘧啶衍生物酸化缓蚀剂。
- 嘧啶衍生物 /
- 酸化缓蚀剂 /
- 缓蚀性能 /
- 电化学测试
Abstract: Using the environmentally friendly biomaterial 4-amino-6-hydroxy-2-mercaptopyrimidine (AMSN) and the anhydrous N,N-dimethylformamide (DMF), a high performance pyrimidine derivative ASMF, which is a corrosion inhibitor for acid job, has been developed through one-step reaction. Characterization by IR spectroscopy and element analysis show that the reaction gave high purity product. Studies on the factors affecting the yield of ASMF show that the optimum molar ratio of AMSN and DMF is 1:1, the reaction temperature should not be higher than 170 °C, and the reaction time should be at least 4 h. The yield of ASMF is relatively high under these conditions. An ASMF sample produced in an experimental production showed excellent corrosion inhibitive capacity in high concentration (>20%) acid solutions, and it functioned at temperatures as high as 170 °C. ASMF shows superior corrosion inhibitive performance even at concentrations less than 0.2%. The electrochemical polarization curve of ASMF shows that ASMF can effectively inhibit the electrode reactions taken place at the cathode and anode during a corrosion process, and it is a mixed corrosion inhibitor which shows cathode inhibition property. Impedance test results show that ASMF has good corrosion inhibition efficiency, at a concentration of 0.2%, the corrosion inhibition efficiency of ASMF is 99.85%. Core damage evaluation test results show that ASMF shows only weak damage to the permeability of cores flooded with the ASMF solution, and ASMF is environmentally friendly. It can be concluded that the product developed is an environmentally friendly high performance pyrimidine derivative corrosion inhibitor for acid jobs
- Pyrimidine derivatives /
- Acidizing corrosion inhibitor /
- Corrosion inhibitive performance /
- Electrochemical test

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图 1 高效嘧啶衍生物缓蚀剂ASMF合成路线

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图 2 高效嘧啶衍生物缓蚀剂ASMF的红外光谱

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图 3 AMSN和DMF的物质的量之比对ASMF产率的影响

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图 4 反应温度对高效嘧啶衍生物缓蚀剂ASMF产率的影响

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图 5 反应时间对ASMF产率的影响

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图 6 盐酸浓度对缓蚀剂缓蚀性能的影响

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图 7 温度对缓蚀剂缓蚀性能的影响

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图 8 缓蚀剂加量对缓蚀剂缓蚀性能的影响

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图 9 不同质量分数ASMF盐酸溶液中的极化曲线和阻抗谱图

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表 1 缓蚀剂ASMF的相关电化学参数拟合结果

ASMF/ %	腐蚀电位/ mV	腐蚀电流/ mA·cm⁻²	b_a/ mV·dec⁻¹	b_c/ mV·dec⁻¹	缓蚀效率/ %
空白	−765	1.3×10⁻⁵	71	−232
0.05	−717	1.8×10⁻⁷	77	−123	95.49
0.10	−695	4.3×10⁻⁸	51	−105	97.65
0.15	−691	3.7×10⁻⁸	50	−119	98.70
0.20	−689	2.1×10⁻⁸	56	−113	99.85
注：b_a和b_c为塔菲尔斜率。

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表 2 缓蚀剂ASMF对长庆油田天然岩心的伤害评价

岩心	K₀/mD	K_d/mD	岩心伤害率/%
C-1	0.0334	0.0283	10.78
C-2	0.0463	0.0400	9.35
Y-1	0.0375	0.0318	10.64
Y-2	0.0386	0.0330	10.09

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表 3 不同缓蚀剂在长庆油田应用实验

缓蚀剂	试验井号	T_井内/ ℃	井内酸浓度/ %	油管节扣在井下时间/d	缓释效率/%
JN	1^#	85～90	15.1～17.3	5	53.2
JY-811	2^#	85～90	15.2～16.9	5	48.3
TDAS	3^#	130～150	18.7～19.3	5	65.3
ASMF	4^#	150～170	18.2～20.4	5	98.3

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