煤田地质与勘探2024，Vol.52Issue(7)：14-24,11.DOI:10.12363/issn.1001-1986.24.05.0362
陕北富油煤地下原位热解先导试验
Pilot experiment for underground in-situ pyrolysis of tar-rich coal in the northern Shaanxi Province
摘要
Abstract
[Objective]The breakthrough of the pilot experiment for underground in-situ pyrolysis of tar-rich coal in the northern Shaanxi has added new vitality to the research on in-situ conversion of fossil energy such as tar-rich coal and oil shale,and the results have attracted wide attention both inside and outside the industry.The research on underground in-situ pyrolysis of tar rich coal is still in its infancy,lacking systematic research on field engineering data.[Methods]Based on the pilot experiment,the main geological conditions and engineering difficulties have been clari-fied,and the progress of underground in-situ pyrolysis has been summarized.The next technical breakthrough directions are also discussed.[Results and Conclusions]The results show that:(1)The superior geological conditions of the pilot experiment area,such as stable coal seams,good coal quality,high tar yield of coal seams,large oil generation potential,weak water-rich coal measures and large thickness of aquiclude.However,there are some factors affecting the engineer-ing implementation,such as poor connectivity of coal seam pores,low diversion capacity,poor thermal conductivity of coal seams,difficulty in efficient heating,difficulty in coal reservoir reconstruction,and high requirements for volume.fracturing;(2)Comprehensive geological evaluation is conducive to avoiding the influence of unfavorable factors such as formation water and faults on the underground pyrolysis process.Controllable shock wave fracturing technology is helpful for the connectivity of underground coal seams.The stable operation of efficient underground electric heaters is the key to efficient oil production.(3)After one month of heating operation,the world's first barrel of underground in-situ pyrolysis oil was extracted,which opened up the technical path of underground in-situ pyrolysis extraction of tar-rich coal and initially obtained the underground temperature,pressure and other process parameters for efficient oil pro-duction.The pilot experiment has a short heating cycle,low oil production and high energy consumption,lacks a tech-nical systematic evaluation of project operation.It is necessary to continue upgrading technologies in terms of develop-ing efficient underground electric heaters,underground coal seam volume fracturing,pyrolysis-gasification integration,comprehensive utilization of heat energy and integrated CCS,so as to comprehensively improve the economy,safety and reliability of underground in-situ pyrolysis extraction of tar-rich coal.关键词
富油煤/地下原位热解/先导试验/热解-气化一体化/陕北Key words
tar-rich coal/underground in-situ pyrolysis/pilot experiment/pyrolytic-gasification integration/northern Shaanxi Province分类
化学化工引用本文复制引用
段中会,杨甫,王振东,马丽,段晓青,曹虎生,陈亮..陕北富油煤地下原位热解先导试验[J].煤田地质与勘探,2024,52(7):14-24,11.基金项目
陕西省秦创原"科学家+工程师"队伍建设项目(KXJ-126) （KXJ-126）
陕西省煤田地质集团有限公司重大科研项目(SMDZ 2020ZD-1) （SMDZ 2020ZD-1）
中国博士后基金项目(2023M732757) （2023M732757）
