天然气勘探与开发2026，Vol.49Issue(5)：1-7,7.DOI:10.12055/gaskk.issn.1673-3177.20260721046
四川盆地高浓度天然氢气的发现:零碳能源勘探的新突破
Discovery of high-concentration natural hydrogen in Sichuan Basin:a new breakthrough in exploration of zero-carbon energy
摘要
Abstract
In June 2026,a natural hydrogen leakage point was discovered in southern Chengdu,Sichuan Basin.To fill the gap in high-concentration natural hydrogen discoveries and promote the exploration of zero-carbon energy in China,after eight consecutive days of dynamic monitoring and sampling,the geochemical characteristics of the sample gas were analyzed and thereby deduced the formation mechanism of natural hydrogen and the deep hydrogen supply system.Results show that(ⅰ)the gas collected at the leakage point is overwhelmingly dominated by hydrogen,with a mole fraction ranging from 97.33%to 98.24%,associated with minor nitrogen and methane,corresponding to the δ13C1 values of-38.01‰ to-40.79‰.The overall gas composition is equivalent to that in the world's most natural hydrogen concentrated reservoirs such as those in Mali and Oman,breaking the concentration record of natural hydrogen discoveries in China;(ⅱ)the extremely low CH4 content effectively eliminates the possibility of hydrogen source from organic matter thermal evolution and methane cracking at high temperature.Coupling with the gas identification chart,it is determined that the natural hydrogen in the study area is of deep inorganic origin;(ⅲ)the minor N2 is not originated from the atmosphere but possibly from crust-derived metamorphic fluids,further verifying the source of deep inorganic fluid system;and(ⅳ)the leakage point is located in the Permian volcanic rock area and adjacent to the Shimian-Miaowan Neoproterozoic ophiolite belt.This geological setting suggests that serpentinized peridotite or Permian diabase porphyry may constitute a deep persistent hydrogen-supply system,and H2 has not experienced significant Fischer-Tropsch reaction and has rapidly transported along faults to shallow strata.It is concluded that the natural hydrogen in southern Chengdu represents the first reported high-concentration natural hydrogen leakage in China,and verifies the presence of geological conditions for highly pure hydrogen accumulation within cratonic basins.This discovery provides a new scientific evidence for natural hydrogen resource survey and evaluation in China,and also lays a foundation for seeking breakthrough by virtue of zero-carbon energy strategy.关键词
天然氢气/高浓度/无机成因/蛇绿岩/零碳能源/四川盆地/成都南部Key words
Natural hydrogen/High-concentration/Inorganic origin/Ophiolite/Zero-carbon energy/Sichuan Basin/Southern Chengdu分类
能源科技引用本文复制引用
田兴旺,谭秀成,宋泽章,李育聪,周艳,张伟,张琳羚,杨春龙,张文锦,张淳,董毕安,何坤,陈洪斌,许强,唐浩..四川盆地高浓度天然氢气的发现:零碳能源勘探的新突破[J].天然气勘探与开发,2026,49(5):1-7,7.基金项目
中国石油天然气股份有限公司前瞻性基础性攻关项目"天然氢形成富集机制与勘查技术研究"(编号:2024DJ93),新型油气勘探开发国家科技重大专项"四川盆地全油气系统与新领域勘探技术"(编号:2025ZD1400400). （编号:2024DJ93）
