注CO2采油井油管柱腐蚀速率预测

doi:10.11885/j.issn.1674-5086.2018.06.07.01

西南石油大学学报(自然科学版) ›› 2019, Vol. 41 ›› Issue (2): 175-184.DOI: 10.11885/j.issn.1674-5086.2018.06.07.01

• 石油机械与油田化学 • 上一篇

注CO₂采油井油管柱腐蚀速率预测

张智¹, 刘金铭¹, 张华礼², 李玉飞², 罗伟²

1. “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;
2. 中国石油西南油气田分公司采气工程研究院, 四川成都 610017

收稿日期:2018-06-07 出版日期:2019-04-10 发布日期:2019-04-10
通讯作者: 张智,E-mail:wisezh@126.com
作者简介:张智,1976年生,男,汉族,四川南充人,教授,博士生导师,主要从事油气井工程教学和科研工作。E-mail:wisezh@126.com;刘金铭,1992年生,女,汉族,河南周口人,硕士研究生,主要从事油气井井筒完整性及管柱腐蚀方面的研究。E-mail:jmconcerns@qq.com;张华礼,1975年生,男,汉族,四川泸州人,高级工程师,主要从事油气井完整性评价、修井和井下工具研发工作。E-mail:zhanghuali@petrochina.com.cn;李玉飞,1981年生,男,汉族,河南驻马店人,高级工程师,硕士,主要从事油气井完井、完整性评价和修井等研究工作。E-mail:L_yf@petrochina.com.cn;罗伟,1983年生,男,汉族,四川遂宁人,高级工程师,硕士,主要从事油气井修井和安全封堵等研究工作。E-mail:luo.wei@petrochina.com.cn
基金资助:
国家科技重大专项（2016ZX05028-001-006）；四川省科技厅青年科技基金（2016JQ0010）；中国石油科技创新基金（2017D-5007-0315）

Prediction of Tubing String Corrosion Rate in CO₂-injection Production Wells

ZHANG Zhi¹, LIU Jinming¹, ZHANG Huali², LI Yufei², LUO Wei²

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. Gas Production Engineering Research Institute, PetroChina Southwest Oil and Gas Field Branch, Chengdu, Sichuan 610017, China

Received:2018-06-07 Online:2019-04-10 Published:2019-04-10

摘要/Abstract

摘要： 针对注CO₂采油井生产中油管柱存在的腐蚀现象，开展了注CO₂采油井不同阶段的油管腐蚀规律研究。对油管柱CO₂腐蚀进展进行了概述，基于动力学原理与金属的电化学腐蚀理论，考虑油气生产过程的产液量、含水率、井口温度、生产压差、流体流速等因素，得到油管内温度压力分布，研究了CO₂采油井油管腐蚀速率预测方法。对实例井的油管柱腐蚀速率做出了预测，并开展主控因素下油管柱腐蚀速率随时间、井深的变化规律研究。结果表明，在整个吞吐周期中，油管腐蚀主要发生在生产阶段。腐蚀情况预测结果与现场实测腐蚀情况吻合较好。

关键词: 油管柱, CO₂腐蚀, 预测模型, 腐蚀速率, 吞吐周期

Abstract: The pattern of tubing corrosion in different stages in CO₂ production wells was investigated from the viewpoint of the phenomenon of tubing string corrosion. Moreover, the progression of CO₂ corrosion in the tubing string is summarized. Based on kinetic principles and the theory of electrochemical corrosion of metals, factors such as the liquid production, water cut, wellhead temperature, production pressure difference, and fluid flow rate were considered. Further, the internal temperature and pressure distribution of the tubing were obtained, and methods for predicting the corrosion rate in CO₂ production well tubing were investigated. The corrosion rates of the tubing string in actual wells were predicted, and the pattern of variation in the tubing string corrosion rate with the time and depth was investigated under the principal control factors. The results show that tubing corrosion occurs primarily in the production stage throughout the throughput cycle. The prediction results of corrosion conditions are in good agreement with the corrosion conditions measured in the field.

Key words: tubing string, CO₂ corrosion, prediction model, corrosion rate, throughput cycle

中图分类号:

TE983
O646.6

张智, 刘金铭, 张华礼, 李玉飞, 罗伟. 注CO₂采油井油管柱腐蚀速率预测[J]. 西南石油大学学报(自然科学版), 2019, 41(2): 175-184.

ZHANG Zhi, LIU Jinming, ZHANG Huali, LI Yufei, LUO Wei. Prediction of Tubing String Corrosion Rate in CO₂-injection Production Wells[J]. 西南石油大学学报(自然科学版), 2019, 41(2): 175-184.

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注CO₂采油井油管柱腐蚀速率预测

Prediction of Tubing String Corrosion Rate in CO₂-injection Production Wells

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