UCG engineering demonstrations in Australia: History and its implications

Authors

ZHOU Ze, Guizhou Youchi Energy Technology Co., Ltd., Guiyang 550014, China; Guizhou Provincial Coalfield Geology Bureau, Guiyang 550081, ChinaFollow
WANG Lingxia, Guizhou Youchi Energy Technology Co., Ltd., Guiyang 550014, China; Guizhou Provincial Coalfield Geology Bureau, Guiyang 550081, China
QIN Yong, Guizhou Youchi Energy Technology Co., Ltd., Guiyang 550014, China; China University of Mining and Technology, Xuzhou 221116, ChinaFollow
JIN Jun, Guizhou Provincial Coalfield Geology Bureau, Guiyang 550081, China; China University of Mining and Technology, Xuzhou 221116, China
YANG Lei, Guizhou Youchi Energy Technology Co., Ltd., Guiyang 550014, China
YI Tongsheng, Guizhou Provincial Coalfield Geology Bureau, Guiyang 550081, China

Abstract

Underground coal gasification (UCG), which is a revolutionary coal mining technology, is an important direction for achieving a low-carbon and efficient coal energy structure in China and is also a potential explorable way to ensure the smooth realization of the peak carbon dioxide emissions and carbon neutrality in China. Based on a literature survey, this study sorts out the exploration process of UCG technologies in Australia and analyzes the gains and losses using field test cases. The experience in UCG technologies in Australia can provide a reference for the development of the technologies in China. The results show that the exploration of UCG technologies in Australia can date from the 1970s, followed by UCG field experiments for up to 15 years. As a result, three UCG demonstration projects have been launched in sequence, including the largest, successfully implemented on-site demonstration project outside the former Soviet Union to date. Despite several twists and turns, significant progress has been made, and relevant achievements act as models of global UCG industrialization. The exploration and development of UCG (research and development) technologies in Australia demonstrate that it is feasible to introduce nongovernmental capital to support the costly R&D and field tests of UCG technologies. Moreover, the risks of UCG field tests can be reduced by fully investigating and referencing global experience. According to the experience, an important development direction of the UCG industry is to produce diversified final products using syngas. Regarding engineering technologies, the drilling design and engineering quality are the key to the reliable operation of a UCG gasifier. In particular, materials for well cementing should be determined given the heating-induced shrinkage and expansion of borehole walls. Moreover, the pure oxygen injection device should be equipped with an automatic tripping system to ensure safe UCG production, the sealing performance of a gasifier and its pipelines should be strictly guaranteed in each link of the entire UCG engineering, and it is necessary to conduct geological evaluation and siting in the early stage. Furthermore, various factors should be comprehensively taken into account in the UCG design to ensure the optimal configuration of gasifier-associated wells in the gasification area based on the single-gasifier rolling production. Meanwhile, the development of systematic and detailed industrial policies is the basic guarantee to promote UCG industrialization, and the degree of the prior communication between enterprises and government departments in charge tends to determine the success or failure of UCG projects.

Keywords

Australia, underground coal gasification (UCG), demonstration, research progress, enlightenment

DOI

10.12363/issn.1001-1986.22.12.0971

Recommended Citation

ZHOU Ze, WANG Lingxia, QIN Yong, et al. (2023) "UCG engineering demonstrations in Australia: History and its implications," Coal Geology & Exploration: Vol. 51: Iss. 7, Article 7.
DOI: 10.12363/issn.1001-1986.22.12.0971
Available at: https://cge.researchcommons.org/journal/vol51/iss7/7

Reference

[1] 谢和平. 21世纪高新技术与我国矿业的发展与展望[J]. 中国矿业,2002,11(1):15−22.

XIE Heping. Promoting influences of high–tech progress on development of mining industry in the 21st century[J]. China Mining Magazine,2002,11(1):15−22.

[2] 刘峰,郭林峰,赵路正. 双碳背景下煤炭安全区间与绿色低碳技术路径[J]. 煤炭学报,2022,47(1):1−15.

LIU Feng,GUO Linfeng,ZHAO Luzheng. Research on coal safety range and green low–carbon technology path under the dual–carbon background[J]. Journal of China Coal Society,2022,47(1):1−15.

[3] 葛世荣. 深部煤炭化学开采技术[J]. 中国矿业大学学报,2017,46(4):679−691.

GE Shirong. Chemical mining technology for deep coal resources[J]. Journal of China University of Mining & Technology,2017,46(4):679−691.

[4] 蒋秀明,吴财芳. 煤炭地下气化地质可行性和工艺适用性研究现状与进展[J]. 煤田地质与勘探,2022,50(5):1−12.

JIANG Xiuming,WU Caifang. A review:Geological feasibility and technological applicability of underground coal gasification[J]. Coal Geology & Exploration,2022,50(5):1−12.

[5] 朱利辉,冯备战,胡永兴,等. 华亭烟煤地下气化污染物分布及富集规律[J]. 煤田地质与勘探,2021,49(3):18−25.

ZHU Lihui,FENG Beizhan,HU Yongxing,et al. Distribution and enrichment of pollutants from underground gasification of bituminous coal in Huating Mining Area[J]. Coal Geology & Exploration,2021,49(3):18−25.

[6] 韩磊,秦勇,王作棠. 煤炭地下气化炉选址的地质影响因素[J]. 煤田地质与勘探,2019,47(2):44−50.

HAN Lei,QIN Yong,WANG Zuotang. Geological consideration for site selection of underground coal gasifier[J]. Coal Geology & Exploration,2019,47(2):44−50.

[7] 秦勇,易同生,汪凌霞,等. 面向项目风险控制的煤炭地下气化地质条件分析[J]. 煤炭学报,2023,48(1):290−306.

QIN Yong,YI Tongsheng,WANG Lingxia,et al. Analysis of geological conditions for risk control of UCG project[J]. Journal of China Coal Society,2023,48(1):290−306.

[8] 国家能源局，科学技术部. “十四五”能源领域科技创新规划[EB/OL]. (2021-11-29) [2022-12-18]. http://www.gov.cn/zhengce/zhengceku/2022–04/03/content_5683361.htm.

[9] PERKINS G,DU TOIT E,COCHRANE G,et al. Overview of underground coal gasification operations at Chinchilla,Australia[J]. Energy Sources,Part A:Recovery,Utilization,and Environmental Effects,2016,38(24):3639−3646.

[10] STEWART I. In–situ gasification of coal for Australia (Report Number 297，NERDD，Program of Department of Resources and Energy)[R]. Newcastle：University of Newcastle，1984.

[11] STEWART I McC，WIBBERLEY L J，GUPTA R，et al. Towards a high–output borehole UCG system for hard coals[C]. Erda：7th Underground Coal Symposium，USA，1981.

[12] WALKER L. The development of UCG in Australia[M]. In：Underground Coal Gasification and Combustion，Michael S B and Alexander Y K (editors). Amsterdam：Elsevier Ltd，2018.

[13] Department of Mines and Energy. Feasibility study of UCG，Leigh Creek，South Australia[R]. Melbourne：Shedden Pacific Pty Ltd，August 1983.

[14] KINHILl E. Underground coal gasification：Preliminary feasibility study[R]. Brisbane：Report to WGN Ventures on Power Generation at Swanbank Power Station，January 1989.

[15] WALKER L. Underground coal gasification:A clean coal technology ready for development[J]. The Australian Coal Review,1999,8:19−21.

[16] Austa Energy and Linc Energy N L. Preliminary feasibility study：Underground coal gasification fired power station near Ipswich，Queensland[R]. Brisbane：Linc Energy，November 1997.

[17] BEATH A，WENDT M，MALLETT C. Optimisation of UCG for improved performance and reduced environmental impact[C]. Brisbane：9th Australian Coal Science Conference，2000.

[18] BEATH A C，MARK M R，MALLETT C W. An evaluation of the application of UCG technologies to electricity generation and production of synthesis gas[C]. Cairns：12th International Conference on Soil Science，2003.

[19] PERKINS G. Underground coal gasification Part I:Field demonstrations and process performance[J]. Progress in Energy and Combustion Science,2018,67:158−187.

[20] DASH A. Bloodwood creek–operations update[EB/OL]. (2011-06-27) [2022-12-18]. https://www.docin.com/p–239985150.html.

[21] BLINDERMAN M S，JONES R M. The Chinchilla IGCC project to date：UCG and environment. San Francisco：Gasification Technologies Conference，October 2002.

[22] WALKER L. UCG commercialization and the Cougar Energy project at Kingaroy，Queensland，Australia[M]. In：Underground Coal Gasification and Combustion，Michael S B and Alexander Y K (editors). Amsterdam：Elsevier Ltd，2018.

[23] YANG Dongmin,KOUKOUZAS N,GREEN M,et al. Recent development on underground coal gasification and subsequent CO₂ storage[J]. Journal of the Energy Institute,2016,89(4):469−484.

[24] BAYRAK A. Underground coal gasification[R]. Brisbane：Energy Service Company，2014. [2022-12-16]. https://www.docin. com/p–908734964.html&isPay=1.

[25] PERKINS G，DU TOIT E，KONING B，et al. Unconventional oil production from underground coal gasification and gas to liquids technologies[C]. Dubai：SPE Paper 167025，2013.

[26] GREGG D W. Relative merits of alternate linking techniques for UCG and their system design implications[J]. In Situ,1980,4:207−236.

[27] HILL R W，SHANNON M J. Controlled retracting injection point (CRIP) system：A modified–stream method for in situ coal gasification[R]. Berkeley：Lawrence Livermore National Laboratory，1981.

[28] Cougar Energy Ltd. Cougar energy challenges Queensland Government shutdown：Independent scientific panel report disputed. Brisbane：Presentation Released to Australian Securities Exchange，2011.

[29] BOOTHROYD R G. The importance of public participation in monitoring risks in large–scale industrial projects:An Australian experience[J]. International Journal of Safety and Security Engineering,2017,7(1):19−30.

[30] Queensland Government. Bloodwood creek underground coal gasification project[EB/OL]. (2016-07-26) [2021-04-12]. https://www.qld.gov.au/environment/pollution/management/eis–process/projects/withdrawn–lapsed/bloodwood–creek–underground–coal–gasification–project.