摘要
对埋地液态CO_2管道沿线土壤温度场的分布规律进行了研究,分析了季节及管道输量、埋深、起点温度变化等因素对土壤温度场分布规律的影响。结果表明:埋地液态CO_2管道在其周围形成环状温度场,内层温度较低,外层温度较高;随着输送里程的增加,低温温度层的温度逐渐升高;管道周围土壤等温线在冬季表现为上疏下密,夏季表现为上密下疏;管道埋深越大,起点温度越低,管道周围低温层越厚,而远离管道的温度层受影响较小;CO_2输量变化对土壤温度场分布的影响相对较小,随输送距离的增加,可对管道周围的低温层产生一定的影响。
The study on the soil temperature distribution regularity along the buried liquified CO2 pipeline is conducted. The influences of seasons and pipeline flow rate, buried depth and starting point temperature variation on soil temperature field distribution are analyzed. The study shows the buried liquified CO2 pipeline could form a circular temperature field in the soil. The temperature in outer soil layer is higher than that in inner soil layer. With the increase of CO2 transmission distance, the temperature in low temperature layer increases. In winter, the isotherms are sparse in upper soil and dense in lower soil;but in summer, the isotherms are dense in upper soil and sparse in lower soil. The deeper the buried depth and the lower the starting point temperature of pipeline are, the thicker the low temperature layer is, but the smaller the influence on the remote temperature flied is. The flow rate of CO2 has less influence on soil temperature distribution, it only affects the low temperature layer around the pipeline when the transmission distance increases.
作者
林罡
商永滨
杨立雷
赵大庆
肖述琴
LIN Gang1, SHANG Yongbin1, YANG Lilei1, ZHAO Daqing1, XIAO Shuqin2,3(1. Xi＇an Changqing Technology Engineering Co., Ltd., Xi＇an 710018, China; 2. Oil ＆ Gas Technology Institute, Changqing Oilfield Company, Xi＇an 710018, China; 3. National Engineering Laboratory for Exploration and Development of Low-Permeability Oil ＆ Gas Fields, Xi＇an 710018, Chin)
出处
《石油工程建设》
2018年第4期13-18,24,共7页
Petroleum Engineering Construction
基金
中国石油天然气股份有限公司重大科技专项"CO2驱油与埋存工业化输送和地面工艺技术研究"(2014-E3604)
关键词
液态CO2
埋地管道
土壤温度场
分布规律
影响因素
liquified CO2
buried pipeline
soil temperature field
distribution regularity
influence factor
