开发出一种适合于 CO2 驱技术的经济型金属管道，以期解决 CO2 驱油新技术在多家油田的示范应用带来的传统采输金属管道易发生全面腐蚀和严重的局部腐蚀问题，和使用价格昂贵的高合金耐蚀钢又必将大幅提升油田采输油成本问题。系统全面的开展不同温度、CO2 和 H2S 分压，不同 Cl-、Ca2+和 Ba2+等离子浓度环境下的多因素耦合的金属管道腐蚀机制，提出低 C 中 Cr 的经济型成分体系设计，明确晶粒尺寸、晶粒取向、晶间电位、界面结构以及钢中夹杂物类型、形态、大小、分布对低 C 中 Cr 钢均匀腐蚀、晶间腐蚀和点蚀的影响机理，从宏观、介观、微观、纳观等多尺度层次揭示钢种的耐蚀机制，突破组织精细化的工业生产的全流程控制技术及焊接技术，制备出 CO2 驱全生命周期服役的钢管，提出全生命周期腐蚀评价模型，建立 CO2 驱专有的腐蚀评价技术和评价体系，实现 CO2 驱专用管材的工业化生产及示范应用，为丰富我国钢管的品种规格、提升产品质量提供理论支撑和技术支持。

Developed an economical metal pipeline suitable for CO2 flooding technology in order to solve the problems of general corrosion and severe local corrosion of traditional production and transportation metal pipelines caused by the demonstration and application of new CO2 flooding technology in many oil fields. Expensive high-alloy corrosion-resistant steel will greatly increase the cost of oil production and transportation in oil fields. Comprehensively carry out the multi-factor coupling metal pipeline corrosion mechanism under different temperatures, CO2 and H2S partial pressures, and different Cl-, Ca2+ and Ba2+ plasma concentrations, and propose an economical composition system design for low C and Cr, and clarify the grain size , Grain orientation, intergranular potential, interface structure, and the type, shape, size, and distribution of inclusions in steel affect the uniform corrosion, intergranular corrosion and pitting corrosion of low-C and medium-Cr steel, from the macroscopic, mesoscopic, microscopic, Naguan and other multi-scale levels reveal the corrosion resistance mechanism of steel grades, break through the entire process control technology and welding technology of refined industrial production, prepare CO2 flooding full life cycle service steel pipe, propose a full life cycle corrosion evaluation model, and establish The proprietary corrosion evaluation technology and evaluation system for CO2 flooding realizes the industrial production and demonstration application of special pipes for CO2 flooding, providing theoretical support and technical support for enriching the variety and specifications of steel pipes in China and improving product quality.