Study On Influencing Factors Of The Temperature Of Leakage Of High-Pressure Dense-Phase CO₂ In Pipeline Transportation

Carbon dioxide enhanced oil recovery technology?CO₂-EOR?can combine carbon reduction and flooding with a wide range of applications.High-pressure dense phase CO₂ pipeline transport,as a CO₂ transport method,can easily lead to pipeline failure rupture in the transport process,resulting in CO₂ leakage;the surrounding soil environment has a low temperature effect.Based on this research status,the high pressure dense phase buried CO₂ buried pipeline is the research object;the experimental analysis and numerical simulation of the soil temperature distribution after pipeline leakage has been studied,and the temperature distribution law and its influencing factors and changes in the law after the buried pipeline leakage have been obtained.1)In experimental research part,the CO₂ buried pipeline leakage simulation device has been designed,and some leakage experiments have been carried out;the soil temperature distribution after the leakage of pipeline has been studied.The low temperature distribution in the sand is funnel-like,the lowest temperature appears in a certain distance above the leakage;the area above the leak is low temperature area,the outward temperature gradually increased.2)The effects of leakage pressure and leakage caliber on the temperature distribution in soil were studied experimentally.The greater the leakage temperature,the larger the maximum temperature difference in the soil,the greater the maximum temperature difference between the surface temperature;the larger the leakage caliber,the higher the lowest temperature in the soil,the greater the maximum temperature difference,the faster the surface temperature cools.3)In numerical simulation part,combined with the actual working conditions,determine the numerical calculation program and use of Fluent software to simulate the distribution of buried pipeline after the temperature distribution in the soil,and experimental results verify that there is a good fit.