齐鲁石化—胜利油田CO_(2)长输管道数智化关键技术与创新实践

Key technologies for digital intelligence of long-distance CO_(2) pipeline and their innovative practices in the Qilu Petrochemical-Shengli Oilfield CO_(2) pipeline

二氧化碳(CO_(2))管道输送是碳捕集利用与封存(CCUS)的关键环节之一,齐鲁石化—胜利油田CO_(2)长输管道工程作为我国第一条百公里、百万吨级、超临界压力CO_(2)管道示范工程,将数智化作为保障管道安全运维的重要技术手段,取得了重要的理论创新和建设新进展。为此,以该示范工程为例,分析了其面临的挑战,从流动保障、腐蚀防控及泄露监测等方面系统梳理了底层机理模型构建、多系统数据融合等长距离管道安全运维的关键技术及其数智化技术应用,最后对CO_(2)长输管道数智化技术发展进行了展望。研究结果表明:(1)通过“工程建设100%数字交付+多元机理数据驱动”的方式,打造了基于CO_(2)管输的水热力流动模型、管道腐蚀速率模型、管外土壤中气—固两相迁移模型,构建了站线一体化的多机理融合数字孪生管道;(2)形成了超临界CO_(2)管输流动保障关键技术体系;(3)揭示了超临界CO_(2)管输内腐蚀机制,建立了管道腐蚀预测模型;(4)创建超临界压力下密相CO_(2)管道小孔泄漏扩散模型,构建了CO_(2)管道泄漏数智化预警模型。结论认为,齐鲁石化—胜利油田CO_(2)长输管道以数智化建设为导向,在流动保障、腐蚀防控及泄露监测方面取得了理论创新成果,对“碳中和”目标下CO_(2)管道数智化技术的发展具有重要的指导作用和现实意义。

CO_(2) pipeline transportation is one of the key links in carbon capture,utilization and storage(CCUS).As China's first demonstration project of CO_(2) pipeline with supercritical pressure and a length of one hundred kilometers and a capacity of one million tons,the long-distance CO_(2) pipeline from Qilu Petrochemical to Shengli Oilfield takes digital intelligence as the important technical means to ensure safe pipeline operation maintenance,which has achieved important theoretical innovation and new construction progress.Taking the Qilu Petrochemical–Shengli Oilfield CO_(2) pipeline as an example,this paper analyzes the challenges,systematically reviews the application of the key technologies and digital intelligence technologies for safe operation maintenance of long-distance pipeline such as low-level mechanism model building and multi-system data integration from the aspects of flow assurance,corrosion prevention&control and leakage monitoring,and finally predicts the development of long-distance CO_(2) pipeline technologies.The following results are obtained.First,the thermal hydraulic flow model based on CO_(2) pipeline,the pipeline corrosion rate model and the gas–solid two-phase transfer model in the soil outside the pipeline are established in the mode of"100%digital delivery of engineering construction+multi-element mechanism data driven",and the station–pipeline integrated multi-mechanism fusion digital twin pipeline is constructed.Second,the key technology system for flow assurance of supercritical CO_(2) pipeline is formed.Third,the corrosion mechanisms inside the supercritical CO_(2) pipeline are revealed,and the pipeline corrosion prediction model is established.Fourth,the small-hole leakage diffusion model of dense phase CO_(2) pipeline under supercritical pressure is established,and the digital intelligence warning model of CO_(2) pipeline leakage is constructed.In conclusion,the Qilu Petrochemical–Shengli Oilfield CO_(2) pipeline has achieved theoretical innovation from aspects of flow assurance,corrosion prevention&control and leakage monitoring under the orientation of digital intelligence construction,which is of important guidance and practical significance for the development of the digital intelligence technologies for CO_(2) pipelines under the goal of"carbon neutrality".