碳酰胺复合驱吞吐井缓蚀剂优选评价

doi:10.11885/j.issn.16745086.2021.04.29.06

西南石油大学学报(自然科学版) ›› 2021, Vol. 43 ›› Issue (4): 138-146.DOI: 10.11885/j.issn.16745086.2021.04.29.06

• 深层和非常规油气钻完井专刊 • 上一篇下一篇

碳酰胺复合驱吞吐井缓蚀剂优选评价

赵海燕¹, 易勇刚¹, 于会永¹, 刘振东^2,3, 曾德智²

1. 中国石油新疆油田公司工程技术研究院, 新疆克拉玛依 834000;
2. 油气藏地质及开发工程国家重点实验室·西南石油大学, 四川成都 610500;
3. 四川新创能石油工程技术有限公司, 四川广元 628000

收稿日期:2021-04-29 发布日期:2021-08-06
通讯作者: 曾德智,E-mail:zengdezhi1980@163.com
作者简介:赵海燕,1983年生,女,汉族,四川南充人,工程师,硕士,主要从事采油工程方面的研究工作。E-mail:182368256@qq.com
易勇刚,1979年生,男,汉族,四川仁寿人,高级工程师,主要从事提高采收率及油田化学方面的研究。E-mail:yiyg@petrochina.com.cn
于会永,1983年生,男,汉族,山东沂南人,高级工程师,硕士,主要从事采油工程方面的研究工作。E-mail:fcyhy@petrochina.com.cn
刘振东,1994年生,男,汉族,陕西延安人,博士研究生,主要从事油气田腐蚀与防护方面的研究工作。E-mail:421886244@qq.com
曾德智,1980年生,男,汉族,四川宜宾人,教授,博士,主要从事油气田腐蚀与防护、石油管力学与环境行为方面的研究工作。E-mail:zengdezhi1980@163.com
基金资助:
国家自然科学基金（51774249）；四川省科技计划（21JCQN0066）

Optimization and Evaluation of Carbamide Composite Flooding Corrosion Inhibitor for Stimulation Well

ZHAO Haiyan¹, YI Yonggang¹, YU Huiyong¹, LIU Zhendong^2,3, ZENG Dezhi²

1. Research Institute of Engineering Technology, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China;
2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
3. Sichuan Xinchuangneng Petroleum Engineering Technology Co. Ltd., Guangyuan, Sichaun 628000, China

Received:2021-04-29 Published:2021-08-06

摘要/Abstract

摘要： 某西部油田碳酰胺复合驱吞吐井井筒温度最高可达260℃，CO₂分压预计为0.4 MPa，井筒管柱面临较高的腐蚀风险。为了解决井筒腐蚀问题，根据碳酰胺复合驱吞吐井井筒服役工况的特点，提出了一套适用于碳酰胺复合驱吞吐井的缓蚀剂优选评价技术流程。首先，对预选的缓蚀剂进行配伍性评价，然后，进行热滚耐温测试和电化学测试，优选出耐温性能和缓蚀性能良好的缓蚀剂，再采用高温高压釜模拟现场腐蚀工况对缓蚀剂防护效果进行评价；最后，结合碳酰胺复合驱吞吐井注-焖-采的工艺特点和不同阶段的腐蚀环境，确定了焖井降温阶段为缓蚀剂的最佳注入时机。研究结果表明，在温度180℃、CO₂分压0.4 MPa条件下，优选出的缓蚀剂XCN2-21可将N80管材的腐蚀速率降低至0.044 1 mm/a，满足油田腐蚀控制要求。

关键词: 碳酰胺, 二氧化碳, 井筒, 腐蚀与防护, 缓蚀剂

Abstract: In a western oil field, the temperature of the wellbore of a carbonamide combined flooding well can be as high as 260℃, and the partial pressure of CO₂ is expected to be 0.4 MPa. The wellbore string is facing a higher risk of corrosion. To solve the problem of wellbore corrosion, according to the characteristics of the service conditions of the wellbore of the carbonamide combined flooding huff and puff well, a set of corrosion inhibitor optimization evaluation technical process suitable for the carbonamide combination flooding huff and puff well is proposed. First, the compatibility of the preselected corrosion inhibitor is evaluated, and then the hot roll resistance is performed. Temperature test and electrochemical test, select the corrosion inhibitor with good temperature resistance and corrosion inhibition performance, and then use the high-temperature autoclave to simulate the on-site corrosion conditions to evaluate the corrosion inhibitor protection effect; finally, combining the process characteristics of the injection-simmering-production of the carbonamide combined flooding huff and puff well and the corrosive environment at different stages, the optimal injection timing of the corrosion inhibitor in the cooling stage of the simmering well is determined. The research results show that under the conditions of temperature 180℃ and CO₂ partial pressure 0.4 MPa, the optimized corrosion inhibitors XCN2-21 can reduce the corrosion rate of N80 pipes to 0.044 1 mm/a, meeting the requirements of oilfield corrosion control.

Key words: carbonamide, carbon dioxide, wellbore, corrosion and protection, corrosion inhibitor

中图分类号:

TE341

赵海燕, 易勇刚, 于会永, 刘振东, 曾德智. 碳酰胺复合驱吞吐井缓蚀剂优选评价[J]. 西南石油大学学报(自然科学版), 2021, 43(4): 138-146.

ZHAO Haiyan, YI Yonggang, YU Huiyong, LIU Zhendong, ZENG Dezhi. Optimization and Evaluation of Carbamide Composite Flooding Corrosion Inhibitor for Stimulation Well[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2021, 43(4): 138-146.

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碳酰胺复合驱吞吐井缓蚀剂优选评价

Optimization and Evaluation of Carbamide Composite Flooding Corrosion Inhibitor for Stimulation Well

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