油页岩原位加热温度场测温误差的评价
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摘要
基于有限体积方法,对当前国内研究程度较高的IFCD原位开采技术进行数值模拟,分析测温井系统误差的形成原因与机理,并重点阐述测温误差的影响程度及变化规律。研究表明:不同材料之间的物性差异会对局部温度场的分布产生干扰,并使得测量值显著偏离真值,偏离程度由加热时间和热源间距共同控制。模拟过程的平均相对误差为3. 15%,最大相对误差可达15%。随着加热时间的延长,测温误差呈现出先增大后减小的趋势,而随着热源间距的增加,测温误差则先降低后增加。
Based on finite volume method,the IFCD,an in-situ mining technology with high degree of research in China was numerically simulated. The errors in cause and mechanism of measurement system were analyzed,and the extent of impact and the change law were emphatically evaluated. The research shows that the distribution of local temperature field was interfered with the difference of physical properties of different materials,which caused the measured value deviate significantly from the true value,and the deviation was controlled by heating time and heat source separation distance. The average relative error of the simulation process was 3. 15%,and the maximum relative error could be up to 15%. The temperature measurement error firstly increased and then fell off with the extension of heat-up time,whereas it showed the opposite trend as the distance between the heat source increased.
Based on finite volume method,the IFCD,an in-situ mining technology with high degree of research in China was numerically simulated. The errors in cause and mechanism of measurement system were analyzed,and the extent of impact and the change law were emphatically evaluated. The research shows that the distribution of local temperature field was interfered with the difference of physical properties of different materials,which caused the measured value deviate significantly from the true value,and the deviation was controlled by heating time and heat source separation distance. The average relative error of the simulation process was 3. 15%,and the maximum relative error could be up to 15%. The temperature measurement error firstly increased and then fell off with the extension of heat-up time,whereas it showed the opposite trend as the distance between the heat source increased.
引文
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[3] US Department of Energy. Secure fuels from domestic resources:the continuing evolution of America's oil shale and tar sands industries[R]. Washington:US Department of Energy,2007:20-36.
[4]宋青磊,刘招君,胡菲,等.松辽盆地扶余—长春岭地区上白垩统青山口组油页岩品质特征及意义[J].世界地质,2016,35(2):487-494.SONG Qing-lei,LIU Zhao-jun,HU Fei,et al. Oil shale characteristics of Upper Cretaceous Qiangshankou Formation in Fuyu-Changchunling area of Songliao Basin and its significance[J]. Global Geology, 2016, 35(2):487-494.
[5]汪友平,王益维,孟祥龙,等.美国油页岩原位开采技术与启示[J].石油钻采工艺,2013,35(6):55-59.WANG You-ping,WANG Yi-wei,MENG Xiang-long,et al. Enlightenment of American's oil shale in-situ retorting technology[J]. Oil Drilling&Production Technology,2013,35(6):55-59.
[6] Fan Y,Durlofsky L J,Tchelepi H A. Numerical simulation of the in-situ upgrading of oil shale[J]. SPE Journal,2010,15(2):368-381.
[7]施卫平,郑欢,王冰清.水平井电加热油页岩过程的数值模拟[J].石油钻采工艺,2014,36(5):80-83.SHI Wei-ping,ZHENG Huan,WANG Bing-qing. Numerical simulation of electric heating for oil shale in horizontal wells[J]. Oil Drilling&Production Technology,2014,36(5):80-83.
[8]薛晋霞,刘中华.油页岩电加热法原位干馏温度场分布的数值仿真[J].地下空间与学报,2015,11(3):669-672.XUE Jin-xia,LIU Zhong-hua. Numerical simulation of the temperature field distribution of oil shale under in-situ process by the electricity heating method[J]. Chinese Journal of Underground Space and Engineering,2015,11(3):669-672.
[9]高孝巧,杨浩,熊繁升,等.油页岩原位加热井下温度场及热应力研究[J].断块油气田,2014,21(3):373-377.GAO Xiao-qiao,YANG Hao,XIONG Fan-sheng,et al.Temperature field and thermal stress of downhole system for in-situ heating on oil shale[J]. Fault-Block Oil&Gas Field,2014,21(3):373-377.
[10]李隽,汤达祯,薛华庆,等.中国油页岩原位开采可行性初探[J].西南石油大学学报(自然科学版),2014,36(1):58-64.LI Jun,TANG Da-Zhen,XUE Hua-qing,et al. Discussion of oil shale in-situ conversion process in China[J]. Journal of Southwest Pertoleum University(Science&Technology Edition),2014,36(1):58-64.
[11]赵金岷.油页岩原位竖井压裂化学干馏提取页岩油气的方法及工艺[P].中国,2013101525337.2014-3-26.ZHAO Jin-min. Method and process for extracting shale oil and gas by in-situ shaft fracturing chemical distillation of oil shale[P]. China,2013101525337. 2014-3-26.
[12] Spalding D. Lectures in mathematical models of turbulence[M]. Manhattan:Academic Press,1972:75.
[13] Gustafsson S,Karawacki E,Chohan M. Thermal transport studies of electrically conducting materials using the transient hot-strip technique[J]. Journal of Physics D:Applied Physics,2000,19(5):727.
[14] Dorfman A. Laminar fluid flow and heat transfer[M].Hoboken:John Wiley&Sons Limited,2016:15-19.