套管内腐蚀的牺牲阳极保护效果模拟评价  

Reliability Analysis of Sacrifice Anode Protection Technology for Oilwell Casing

作　　者：李琼玮 孙雨来[2,3] 程碧海[2,3] 杨立华[2,3] 卢文伟[2,3] 付彩利[2,3] 张建勋[1] LI Qiongwei;SUN Yulai;CHENG Bihai;YANG Lihua;LU Wenwei;FU Caili;ZHANG Jianxun(State Key Laboratory for Mechanical Behavior of Materials,Xi′an Jiaotong University,Xi′an,Shaanxi 710049,China;National Engineering Laboratory for Low-permeability Oil&Gas Exploration and Development,Xi′an,Shaanxi 710021,China;Oil&Gas Technology Research Institute,PetroChina Changqing Oilfield Company,Xi′an,Shaanxi 710021,China)

机构地区：[1]西安交通大学金属材料强度国家重点实验室,陕西西安710049 [2]低渗透油气田勘探开发国家工程实验室,陕西西安710021 [3]中国石油长庆油田分公司油气工艺研究院,陕西西安710021

出　　处：《石油管材与仪器》2021年第6期62-66,73,共6页Petroleum Tubular Goods & Instruments

摘　　要：针对某区域的侏罗系油井动液面以下段内腐蚀套损问题,以重点腐蚀段长效防护为目标,研制并试验了耐温阳极工具的套管保护技术。为评价其保护效果,依据阴极保护相关规范,开展理论计算研究、数值模拟计算分析和模拟试验验证,获得套管内壁保护电位与保护长度、介质电阻率等参数的关系规律,为保障和优化耐温阳极工具在高腐蚀井中的应用提供指导。Aiming at the long-term protection of casing internal corrosion problems below moving liquid-surface in Jurassic formation of one oilfield district, thermostable sacrifice anode protection technology and tools have been developed and applied to the oilwell. The reliability of sacrifice anode is evaluated using the theoretical calculated analysis, mathematical model and simulation experiments based on cathodic protection recommended practices. The relationships of surface protective potential, distance and medium resistance ratio have been achieved for field application of thermostable anode tools.

关 键 词：油井 套管内腐蚀 耐温牺牲阳极 模拟评价 

分 类 号：TE931.2[石油与天然气工程—石油机械设备]