摘要
从热力学和动力学角度研发出了防腐蚀外掺料BCE-750S,并分别从水泥石的腐蚀深度、渗透率、抗压强度方面对BCE-750S的防腐蚀性能进行了室内评价。结果表明,BCE-750S水泥浆具有显著的防CO2腐蚀能力,将BCE-750S按40%～60%的比例外掺到油井水泥中,可有效提高水泥石对CO2的防腐蚀能力,降低腐蚀深度和渗透率,使抗压强度提高50%以上。结合现场情况,优化设计出适合于CCS(CO2捕获与封存)项目的防腐蚀水泥浆体系,在中神注1井、中神监1井φ139.70 mm尾管及回接固井得到成功应用,对90%以上的目标层位实现了有效水力封隔。
An anti-corrosion additive BCE-750S is developed based on thermodynamics and kinetics.It is evaluated from corrosion depth,permeability and the compressive strength.The results show that the cement mixed with 40%-60% (BWOC) BCE-750S can increase the performance of CO2 corrosion resistance greatly,reduce the corrosion depth and permeability effectively,and improve the compressive strength of more than 50%.Combined with field operation,an anti-corrosion slurry system is designed for Shenhua CCS (CO2 Capture and Storage) project.This system is applied to the liner (φ 139.7 mm) cementing and tieback liner cementing of wells of Zhongshenzhul and Zhongshenjianl successfully.More than 90% target layers are isolated hydraulically.
出处
《钻井液与完井液》
CAS
2011年第B11期17-19,83,共3页
Drilling Fluid & Completion Fluid
基金
中国石油天然气集团公司科技项目"天然气井固井水泥环封隔性能研究"(2008A-2304)的部分研究成果
关键词
固井
水泥浆
CO2腐蚀
Cementing
Cement slurry
Shenhua CCS
CO2 corrosion
