摘要
针对中原油田气举井流速高腐蚀严重的生产难点,自行研制实验设备,分别模拟了不同温度、压力条件下各种流体条件下的多组气蚀实验,并借助X-衍射分析、扫描电镜能谱分析等分析方法对气举井油管腐蚀沟槽的形成原因及特点进行了分析对比,得出了气液两相流状态下石油管材的腐蚀规律。结果表明,两相流状态的冲蚀磨损主要是以剥落机制为主,通过基体表面的片层剥落进,进而形成腐蚀坑。腐蚀速率随着冲击速度的增大而增大,在压力为0.1MPa附近达到最大值,腐蚀形貌也最明显,其后又逐渐减小。在试验温度下,速率随着温度升高增大。本实验为气举开发油气田的管柱冲蚀腐蚀与防护工作提供理论及实验依据。
Based on simulating respectively different kinds of fluid under different temperature and pressure, the cavitation experiments were carried out, and the formative causes and features of tubing corrosion in gas-lift well were analyzed and contrasted in virtue of X-diffracted ray and scanning electron microscope spectral analysis method, consequently, the corrosive laws of tubing were obtained in air and liquid two-phase flow state. The results in experiment showed that the flakeroff was main mode of abrasion. With flow speed increasing, corrosion rate augment. In the vicinity of 0.1 MPa pressure, the corrosion rate is maximal. In test temperature, corrosion rate increases with temperature raising.
出处
《钻采工艺》
CAS
北大核心
2007年第3期108-110,共3页
Drilling & Production Technology
基金
国家自然基金项目的研究成果
编号:50374057
关键词
气举
管柱
气蚀
实验
gas lift, pipe string, cavitation, experiment
