川南某页岩气井N80油管腐蚀穿孔的失效分析

刘良果, 胡欢, 刘鹏, 鲁威, 赵柯, 曾德智

doi:10.16577/j.issn.1001-1560.2023.0279

材料保护 >

2023 , Vol. 56 >Issue 11: 193 - 198

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0279

实用技术

川南某页岩气井N80油管腐蚀穿孔的失效分析

展开

¹西南油气田分公司集输工程技术研究所； ²西南石油大学油气藏及地质开发工程国家重点实验室； ³四川长宁天然气开发有限责任公司； ⁴西南油气田分公司输气管理处

曾德智(1980-),教授,主要研究方向为石油管力学与环境行为、油气田材料与腐蚀,电话:19130617352,E-mail:9137110@qq.com

收稿日期: 2023-05-25

修回日期: 2023-06-21

录用日期: 2023-07-20

网络出版日期: 2023-12-25

基金资助

四川省科技计划资助项目(21JCQN0066);国家自然科学基金资助项目(51774249)

收起

Failure Analysis of N80 Tubing Corrosion Perforation in a Shale Gas Well in South Sichuan

Expand

(1. Institute of Gathering and Transportation Engineering, Southwest Oil and Gas Field Company, Chengdu 610014, China; 2. State Key Laboratory of Oil and Gas Reservoir and Geological Development Engineering, Southwest Petroleum University, Chengdu 610500, China; 3. Sichuan Changning Natural Gas Development Co., Ltd., Chengdu 610000, China; 4. Gas Transmission Management Department of Southwest Oil and Gas Field Company, Chengdu 610200, China)

Received date: 2023-05-25

Revised date: 2023-06-21

Accepted date: 2023-07-20

Online published: 2023-12-25

Fold

摘要

为探究四川某盆地页岩气井N80油管发生腐蚀穿孔失效的原因,通过宏观观察、理化性能检测、组织分析、扫描电镜观察和能谱分析等方法,并结合现场服役工况,系统分析了某N80油管发生腐蚀穿孔的原因。结果表明:油管理化性能及材质符合要求,油管表面有大量疏松多孔的腐蚀产物,以FeCO3、FeS和CaCO3等形式存在且可以看到SRB细菌的聚合体,EDS结果表明腐蚀产物中含有较多的S元素。该油管的腐蚀穿孔主要是由微生物腐蚀导致,CO2和油基钻井液中的高Cl-的耦合作用加速了局部腐蚀穿孔,添加杀菌剂可以抑制微生物对油管的腐蚀。

关键词： N80油管; 细菌腐蚀; 穿孔; 失效分析

本文引用格式

刘良果, 胡欢, 刘鹏, 鲁威, 赵柯, 曾德智 . 川南某页岩气井N80油管腐蚀穿孔的失效分析[J]. 材料保护, 2023 , 56(11) : 193 -198 . DOI: 10.16577/j.issn.1001-1560.2023.0279

Abstract

In order to find out the cause of corrosion perforation failure of N80 tubing in a shale gas well in Sichuan basin, the causes of corrosion and perforation of N80 tubing were systematically analyzed by macroscopic observation, physical and chemical properties examination, tissue analysis, scanning electron microscope observation and energy spectrum analysis, combined with field service conditions. Results showed that the physical and chemical properties and materials of the oil pipe met the requirements, and there were a large number of loose and porous corrosion products on the surface of the oil pipe, which existed in the form of FeCO3, FeS and CaCO3. Moreover, the aggregate of SRB bacteria could be observed, and EDS results suggested the surface corrosion products contained more S elements. Hence, the corrosion perforation of the tubing was mainly caused by microbial corrosion. The coupling effect of CO2 and high Cl- in oil-based drilling fluid accelerated the local corrosion perforation, and adding fungicides could inhibit microbial corrosions of tubing.

Key words： N80 tubing; bacteria corrosion; perforation; failure analysis

Options

文章导航

模态框（Modal）标题

摘要

本文引用格式

Abstract