中国氦气产业现状及未来发展方向

    Overview of China’s helium industry and its future development

    • 摘要: 氦气作为一种不可再生、不可替代的战略性稀有气体,在航空航天、半导体制造、核磁共振成像、低温超导及国防军工等关键领域具有不可替代的重要作用。当前,中国氦气需求持续快速增长,但国内供应能力严重不足,高度依赖进口,且进口来源受国际地缘政治格局变动影响显著,供应链安全面临严峻挑战。在此背景下,本文从近年来国内氦气供给的复杂变化情况,分析加强国内氦气产业布局的必要性,根据中国氦气资源现状和资源特点,提出未来氦气产业发展方向。研究结果表明,中国对氦气的需求总体呈上升趋势,严重依赖进口,进口国由于国际形势的变化不断发生改变。为了避免断供风险,需要加强国内氦气产业布局,让氦气供给达到自主可控。目前国内发现的天然气中氦气资源总体品位较低,富氦资源少,贫氦资源多,不利于氦气的生产。未来氦气产业发展方向,从源头上,根据氦气富集特点与天然气成藏的差异,在中部地区、西部地区选择有利于氦气富集的低品位油气区进行富氦资源的勘探。在生产上,根据天然气中氦气资源品位划分等级,分别采用不同的方法进行提氦生产,氦气含量大于0.3%的资源可以直接提氦;氦气含量介于0.1%~0.3%之间的气藏,可以结合其他化工产品生产进行联合提氦,降低成本;氦气含量在0.03%~0.10%之间的天然气,可以借助液化天然气生产利用闪蒸气提氦;在以二氧化碳为主的气藏,氦气含量达0.03%以上,辖区内有需要注二氧化碳采油的区块,可以进行二氧化碳生产的同时提取氦气。在西部经济欠发达地区,用氦企业少,氦气到中部、东部发达地区运输成本高,不具有竞争力,发现的富氦气藏可作为战略储备进行保护,限制开采。本文提出的氦气勘探和提氦建议为中国氦气产业的发展规划和政策的制定提供参考依据。

       

      Abstract: Helium, as an irreplaceable and non-renewable strategic rare gas, plays an indispensable and crucial role in key fields such as aerospace, semiconductor manufacturing, nuclear magnetic resonance imaging, low-temperature superconductivity, and national defense and military industry. Currently, China’s demand for helium is growing rapidly, but domestic supply capacity is seriously insufficient, with a high degree of reliance on imports. Moreover, the sources of imports are significantly affected by changes in the international geopolitical landscape, posing severe challenges to the security of the supply chain. Against this backdrop, this paper examines the complex changes in domestic helium supply in recent years, analyzes the necessity of strengthening the domestic layout of the helium industry, and, based on the current status and characteristics of China’s helium resources, proposes future development directions for the helium industry. The results show that China’s demand for helium is generally increasing and remains heavily dependent on imports, while the countries of origin for helium imports have been constantly shifting in response to changes in the international situation. To mitigate the risk of supply disruption, it is necessary to reinforce the domestic industry layout so that helium supply becomes autonomous and controllable. Helium contents in helium-bearing natural gas resources discovered in China are generally low, with relatively few helium-rich and many helium-poor accumulations, which is unfavorable for helium production. For the future development of the helium industry: at the upstream stage, focus on exploration for helium-rich resources in low-grade oil and gas accumulations in central and western China that are favorable for helium enrichment, taking into account the differences between helium enrichment characteristics and natural gas accumulation. At the production stage, different helium recovery technologies should be adopted according to helium grades in natural gas: helium can be directly recovered from gases with helium contents >0.3%; for gas reservoirs with 0.1%-0.3% helium, helium should be co-produced together with other chemical products to reduce costs; for natural gas with 0.03%-0.10% helium, helium can be recovered from boil-off (flash) gas during liquefied natural gas (LNG) production; in CO2-rich gas reservoirs where helium content exceeds 0.03% and CO2 injection for enhanced oil recovery is required within the area, helium can be extracted concurrently with CO2 production. In less developed western regions, where helium-consuming enterprises are scarce and the cost of transporting helium to the more developed central and eastern regions is high and uncompetitive, discovered helium-rich gas reservoirs may be designated as strategic reserves with restricted exploitation. The exploration and helium recovery strategies proposed in this paper provide a reference for the planning of China’s helium industry and for the formulation of relevant policies.

       

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