Study on Crack-Driving Force of CO2 Pipelines

摘要：

In view of the challenge of fracture propagation to the CO2 pipeline, it is illustrated by theory and experiment analysis that saturation pressures of the phase boundary are main crack-driving forces of CO2 pipeline. The correlation between onic and fracture velocity is introduced into the formula between pressure at fracture tip and fracture velocity. On this basis, the calculation model of crack-driving force of CO2 pipelines is established combined with the BWRS equation. Besides, the model solution procedures are also proposed. Simulation program is developed based on VC language and successfully simulates the pressure plateau during release and expansion process of CO2 transported by pipelines. The simulation results also show that the higher the operation temperatures, the narrower the pressure plateau. But the relative pressures will be higher. Therefore the operation temperatures of CO2 pipelines should be as low as possible without phase transition to reduce the crack-driving force as well as the possibility of fracture propagation.

关键词： CO2 pipeline crack-driving force fracture propagation fracture velocity pressure

作者: WU Xia LI Changjun JIA Wenlong YANG Yu

作者单位: School of Petroleum Engineering, Southwest Petroleum University, Chengdu, 610500, Sichuan, China

会议类型: 国际会议

会议名称: The 2010 International Symposium on Safety Science and Technology(2010 安全科学与技术国际会议)

会议地点: 杭州

会议语种:英文

页码: 1317-1321

在线出版日期: 2010-10-26（万方平台首次上网日期，不代表论文的发表时间）