摘要
随着油气田开采环境的恶化,井管腐蚀问题引起了广泛关注,但针对气井腐蚀的研究成果相对较少,且与油井腐蚀没有完全区分开来。本文分析了气井腐蚀结垢的机制,指出井下介质的含水量、细菌、溶解的H2S和二氧化碳等腐蚀性气体,以及气井中天然气水合物的形成、井底的积液段和非积液段、流体组成和流体分布等,都是导致井管腐蚀和结垢的主要因素。介绍了近年来井管腐蚀和结垢的主要评价方法,以及高产液井井管腐蚀和结垢模拟装置的研究进展,并提出装置的自动化、智能化和集成化,是未来研发的主要方向。与传统的评价方法相比,全尺寸腐蚀模拟评价装置考虑了井内流体流速、温度和压力的变化对腐蚀速率的影响,可以在宏观上模拟整个井内环境,真实有效地模拟井内腐蚀,可为井内腐蚀的分析和结垢机理的研究提供理论指导。
With the deterioration of the oil and gas field production environment,the corrosion problem of well tube was attracted widespread attention.However,there were relatively few research reports on gas well corrosion,which was not completely different from oil well corrosion.The mechanism of corrosion and scaling in gas wells was summarized,and it was pointed out that the main factors leading to corrosion and scaling in well pipes were the water content of downhole media,bacteria,the dissolution of a certain amount of corrosive gases such as H2S and carbon dioxide,as well as the formation of natural gas hydrates in gas wells,fluid accumulation and non fluid accumulation sections at the bottom of the well,fluid composition,and fluid distribution.The main evaluation methods for well tube corrosion and scaling in recent years were introduced,and the development of high yield liquid well tube corrosion and scaling simulation devices was introduced.It was proposed that the automation,intelligence,and integration of the devices were the main directions for future research and development.Compared to traditional evaluation methods,the full-scale corrosion simulation evaluation device could simulate the entire well environment from a macro perspective,effectively simulate well corrosion,and provide theoretical guidance for well corrosion analysis and scaling mechanism research,take into account the impact of changes in fluid flow rate,temperature,and pressure in the well on the corrosion rate.
作者
琚子辉
白海涛
何顺安
刘鹏
高亮
马云
JU Zihui;BAi Haitao;HE Shun’an;LIU Peng;GAO Liang;MA Yun(Institute of Petroleum Engineering,Xi’an Shiyou University,Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil&Gas Reservoirs,Xi’an 710065,China;Engineering Research Center of the Ministry of Education for the Development and Treatment of Western Low Permeability-Ultra-low Permeability Reservoirs,Xi’an 710065,China;Gas Production Plant 2 of PetroChina Changqing Oilfield Company,Xi’an 710200,China)
出处
《化工技术与开发》
CAS
2023年第9期39-44,共6页
Technology & Development of Chemical Industry
基金
陕西省教育厅科研计划项目(21JK0841)
西安石油大学研究生创新与实践能力培养计划项目(YCS21112038)
西安石油大学青年科研创新团队项目(2019QNKYCXTD04)。
关键词
气井井筒
腐蚀结垢
影响因素
腐蚀评价
模拟装置
智能化和集成化
研究方向
gas wellbore
corrosion scaling
influencing factors
corrosion evaluation
simulation device
intelligence and integration
research direction
作者简介
琚子辉(1999-),男,汉族,安徽安庆人,在读研究生,研究方向:油气田开发工程。E-mail:1572830582@qq.com;通信联系人:马云(1975-),女,汉族,河南洛阳人,教授,博士生导师,研究方向:入井流体/油气工作液与接触介质相互作用研究。E-mail:mayun9401@xsyu.edu.cn。
