天然气勘探与开发2026，Vol.49Issue(3)：56-67,12.DOI:10.12055/gaskk.issn.1673-3177.2026.03.005
康滇隆起西缘地区氦气成藏条件及其主控因素
Conditions and controlling factors of helium accumulation in the western margin of Kangdian Uplift
摘要
Abstract
Helium is highly valued as a scarce strategic resource.China is highly dependent on imported helium,implying a severe challenge of supply security.The early exploration in the western margin of Kangdian Uplift,which primarily focused on conventional oil and gas,revealed favorable helium shows in some wells,suggesting that this area holds a certain potential of helium resource.To provide reference and basis for helium area evaluation in China,the conditions for helium accumulation in the western margin of Kangdian Uplift were analyzed from the aspects of effective helium source rocks,migration pathways,migration carriers and preservation conditions after investigating the gas composition,fluid information and regional geological data of wells in this area.Then,the main controlling factors of helium accumulation were explored,and two types of helium accumulation models were established.Results show that helium-rich fluids appear in both hot spring gas and natural gas in the western margin of Kangdian Uplift,and some wells show relatively high helium-rich fluids and industrial exploitation value.The Devonian and Silurian shales in the study area have high contents of uranium and thorium and serve as high-quality helium source rocks.Also,the study area has undergone four stages of tectonic evolution,and the deep basement faults act as pathways for helium migration.It is concluded that(i)the source of helium gas in the western margin of the Kangdian Uplift is mainly crustal helium,while helium gas in local areas such as the Chuxiong Basin is of mixed crust mantle source;(ii)this area is developed with multiple sets of uranium-and thorium-rich sedimentary rocks,featuring deep basement faults,and exhibits favorable preservation conditions locally,creating favorable conditions for the formation of helium-rich gas reservoirs;and(iii)high-quality helium source rocks and deep faults as migration pathways are the main factors controlling the formation of helium-rich fluids in the western margin of Kangdian Uplift.关键词
康滇隆起西缘/氦气/成藏条件/主控因素/铀、钍含量/深大断裂/壳源/壳幔混源Key words
Western margin of Kangdian Uplift/Helium/Accumulation condition/Main controlling factor/Uranium and thorium contents/Discordogenic fault/Crustal source/Crust-mantle mixed source分类
能源科技引用本文复制引用
李旭文,韩京,甘元露..康滇隆起西缘地区氦气成藏条件及其主控因素[J].天然气勘探与开发,2026,49(3):56-67,12.基金项目
中国石油化工股份有限公司项目"四川盆地及周缘资源评价"(编号:P23221). （编号:P23221）
