王峰, 喻岳钰, 方惠军, 徐小虎, 葛腾泽, 东振, 徐博瑞, 刘丹璐, 张友军, 刘奕杉. 中国石油中—深层煤炭地下气化理论与技术研究进展[J]. 石油学报, 2024, 45(12): 1863-1876. DOI: 10.7623/syxb202412011
引用本文: 王峰, 喻岳钰, 方惠军, 徐小虎, 葛腾泽, 东振, 徐博瑞, 刘丹璐, 张友军, 刘奕杉. 中国石油中—深层煤炭地下气化理论与技术研究进展[J]. 石油学报, 2024, 45(12): 1863-1876. DOI: 10.7623/syxb202412011
Wang Feng, Yu Yueyu, Fang Huijun, Xu Xiaohu, Ge Tengze, Dong Zhen, Xu Borui, Liu Danlu, Zhang Youjun, Liu Yishan. Research progress in the theory and technology of middle-deep coal underground gasification in CNPC[J]. Acta Petrolei Sinica, 2024, 45(12): 1863-1876. DOI: 10.7623/syxb202412011
Citation: Wang Feng, Yu Yueyu, Fang Huijun, Xu Xiaohu, Ge Tengze, Dong Zhen, Xu Borui, Liu Danlu, Zhang Youjun, Liu Yishan. Research progress in the theory and technology of middle-deep coal underground gasification in CNPC[J]. Acta Petrolei Sinica, 2024, 45(12): 1863-1876. DOI: 10.7623/syxb202412011

中国石油中—深层煤炭地下气化理论与技术研究进展

Research progress in the theory and technology of middle-deep coal underground gasification in CNPC

  • 摘要: 煤炭地下气化可以实现煤炭资源的清洁开发利用,符合油气企业低碳发展战略和国家"双碳"目标。通过简述煤炭地下气化理论技术研究现状,认为煤炭地下气化理论体系基本建立,浅层煤炭地下气化技术相对成熟但未产业化,中—深层煤炭地下气化获得初步验证并已成为煤炭地下气化的发展趋势,但技术复杂、基础研究薄弱,面临气化过程稳定控制等关键挑战。2019年以来,中国石油天然气集团有限公司实施了重大科技专项,攻关800 m以深中—深层煤炭地下气化关键技术。从理论和技术两个角度,总结和介绍专项研究取得的重要进展和认识。在基础理论方面,基于实验技术攻关和系统的实验与模拟研究,深化了煤炭地下气化动力学、气化腔扩展机制、覆岩热形变机制等规律认识,为中—深层煤炭地下气化工程和工艺设计奠定了理论基础。在工艺技术方面,突破了包含气化资源评价与选址评价、气化炉完整性设计和控制、气化运行控制等关键核心技术,形成了气化炉建造装备体系、地下气化井下作业装备系统。提出了继续深化中—深层煤炭地下气化基础研究、同步稳妥推进矿场试验的建议,以提高技术成熟度和工艺稳定性,推进煤炭地下气化产业化发展。

     

    Abstract: Underground coal gasification can achieve the clean development and utilization of coal resources, which is in line with the low-carbon development strategy of petroleum enterprises and the national carbon peaking and carbon neutrality goals. The paper sketches the current research status of the theory and technology of underground coal gasification, and it is considered that the theoretical system of underground coal gasification has been fundamentally established, the shallow coal underground gasification technology is relatively mature and has not yet become industrialized. The middle-deep coal underground gasification has been preliminarily validated and become the development tendency of underground coal gasification. However, it still faces key challenges such as complex technology, poor basic studies, and stability control in the gasification process. Since 2019, China National Petroleum Corporation Limited has implemented a number of major science and technology projects, which aims to tackle key technologies for coal underground gasification in the middle and deep strata deeper than 800 m. From both theoretical and technical perspectives, this paper summarizes and introduces important progresses and understandings achieved from the implementation of major projects. In terms of basic theory, the understandings of underground coal gasification kinetics, gasification cavity expansion mechanism and overburden thermal deformation mechanism is deepened based on a breakthrough in experimental technique and systematic experimental and simulated studies, laying a theoretical basis for the engineering and process design of middle-deep coal underground gasification. In terms of process technology, a breakthrough has been made in the key core technologies, including gasification resource evaluation and site selection evaluation, gasifier integrity design and control as well as gasification operation control, thus forming the gasifier construction equipment system and underground gasification borehole operation equipment system. In addition, it is proposed to continue to deepen the basic research on middle-deep coal underground gasification and simultaneously promote field tests, so as to improve technology maturity and process stability, and push forward the industrialization of underground coal gasification.

     

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