天然气工业2026，Vol.46Issue(3)：45-57,13.DOI:10.3787/j.issn.1000-0976.2026.03.004
柴达木盆地阿尔金斜坡氦气富集规律及成藏机制
Helium enrichment patterns and accumulation mechanisms in the Altyn Slope of the Qaidam Basin
摘要
Abstract
In recent years,helium-rich natural gas resources have been discovered in several gas fields in the Altyn Slope of the Qaidam Basin.However,the helium enrichment patterns,sources and accumulation mechanisms have not been understood completely,which hinders the exploration of helium resources in this area.In this study,natural gas samples collected from Dongping 1,Dongping 3,Jianbei,and Kunteyi gas fields in the Altyn Slope were tested for compositions,carbon isotopes,and noble gas isotopes.Then,the geochemical characteristics,spatial distribution patterns and controlling factors of helium were analyzed systematically,and its accumulation mechanisms were revealed.The following results are obtained.First,the helium content of natural gas in the Altyn Slope exhibits a pattern of"high in marginal uplifts and low in adjacent sags",and it is influenced by multiple factors such as structural position,reservoir horizon,basement lithology,gas reservoir depth,and natural gas charging process.Second,the helium in different gas fields shows multi-source contributions:Dongping 3 and Dongping 1 gas fields feature mixed crustal shallow and deep sources,Jianbei gas field is dominated by deep-source helium,while Dongping 17,Niudong,and Kunteyi gas fields display weak helium supply from in-situ reservoirs or adjacent sources.Third,formation pore-fracture water serves as a key carrier for helium migration and enrichment,and the accumulation of helium in formation water is closely related to the content of radioactive elements U and Th in basement rocks,rock formation age,and formation water activity.Fourth,there are three helium accumulation models in the Altyn Slope:multi-source supply and continuous enrichment,distal supply and multi-stage accumulation,and weak-source supply and proximal accumulation.In conclusion,the helium enrichment in the Altyn Slope of the Qaidam Basin is under the joint control of multiple factors,such as structural position,basement lithology,natural gas charging and formation water activity,and the understanding of helium sources,distribution patterns and accumulation models provides an important theoretical support for the resource potential assessment and targeted exploration and development of helium in this area.关键词
柴达木盆地/阿尔金斜坡/氦气/稀有气体同位素示踪/富集规律/成藏模式Key words
Qaidam Basin/Altyn Slope/Helium/Noble gas isotope tracing/Enrichment pattern/Accumulation model分类
能源科技引用本文复制引用
周俊林,白建科,赵明福,李玉宏,杨国军,韩伟,尹菲,徐聃,贺政阳..柴达木盆地阿尔金斜坡氦气富集规律及成藏机制[J].天然气工业,2026,46(3):45-57,13.基金项目
国家重点研发计划项目"复杂地质介质中氦气运聚及富氦气藏封盖机制研究"(编号:2021YFA0719003),青海省"昆仑英才·高端创新创业人才"特色人才项目"柴达木盆地北缘氦气资源成藏机理及勘探开发"、中国地质调查局项目"氦气资源调查评价与示范"(编号:DD202302002)、陕西省自然科学基金面上项目"热年代学约束下的六盘山盆地海源-固原地区中新生代构造热演化恢复"(编号:2024JC-YBMS-204). （编号:2021YFA0719003）
