深水湿天然气管道温降机理模型的建立及应用  

Establishment and application of temperature drop mechanism model for deep water wet natural gas pipeline

作　　者：王凯 李新仲 李清平 陈晶华 宫敬[2] 

机构地区：[1]中海油研究总院 [2]中国石油大学(北京)

出　　处：《中国海上油气》2013年第1期78-81,共4页China Offshore Oil and Gas

基　　金：国家科技重大专项"深水流动安全保障与水合物风险控制技术(编号:2008ZX05026-004)";中海油京直地区青年科技与管理创新项目"深水含CO2湿天然气管道CRA段长度研究(编号:JZTW2011KJ12)"共同资助

摘　　要：深水湿天然气管道一般采用不挖沟露置铺设方式,投产后在海流、管体自重和海床土质等因素的共同作用下常处于比较复杂的半掩埋状态,其温降预测目前一般采用粗略的总传热系数线性插值模型,但该模型用于确定耐蚀合金管段长度时误差较大。针对这一问题,建立了深水湿天然气管道温降机理模型,并将其应用到耐蚀合金管段长度的计算中。根据机理模型与线性模型的对比结果,建议采用本文建立的机理模型。Generally, the wet natural gas pipeline is directly laid on the surface of seabed in deep water, and will be in the complex partially-buried state due to the combined effect of such factors as subsea current, pipe weight and seabed soil during the op- eration phase. The simple model, based on the lin- ear interpolation of the overall heat transfer coeffi- cient according to the buried ratio, is usually used to predict the temperature drop of the fluid flow in the partially-buried pipeline, which may give big error for the determination of length of corrosion resistant alloy （CRA） pipe section. For this prob- lem, a temperature drop mechanism model for deep water wet natural gas pipeline is developed and ap- plied to calculate the CRA length in this paper. Based on the comparison of the mechanism model and linear model, the mechanism model is recom- mended.

关 键 词：深水 湿天然气管道 温降 机理模型 耐蚀合金管段长度 

分 类 号：TE973[石油与天然气工程—石油机械设备]