西北地质2025，Vol.58Issue(5)：46-59,14.DOI:10.12401/j.nwg.2025038
四川盆地威远气田、金秋气田氦气成藏机制
Study on Helium Reservoir Forming Mechanism of Weiyuan Gas Field and Jinqiu Gas Field in Sichuan Basin
摘要
Abstract
The Sichuan Basin is one of the main natural gas production areas in China,and the helium re-sources of natural gas associated gas are widely distributed.Among them,the Weiyuan Rich Helium Natural Gas Field is the first helium gas field to be industrially utilized in China,with the highest helium content in Weiyuan natural gas reaching 0.342%;Jinqiu gas field is the second natural gas field with high helium content discovered in the basin in recent years,with an average helium abundance of 0.07%.This article analyzes rock and gas samples from Weiyuan and Jinqiu gas fields,and compares them with previous research results.The study shows that the reservoir formation mechanisms of Weiyuan gas field and Jinqiu gas field are different:the main production layer of helium in Weiyuan gas field is the Dengying Formation of the Sinian system,with an average helium content of 0.28%.Helium mainly comes from the basement granite and migrates upward with formation water as a carrier;The helium gas in Jinqiu gas field is mainly produced in the Jurassic Shaximiao Formation,with the highest content of 0.2%in the well.There are multiple sets of helium source rocks,and the Shaximiao Formation sandstone has the highest contribution rate of endogenous helium gas.Helium gas is trans-ported by hydrocarbon gas as the carrier gas,and the differential accumulation of lithological gas reservoirs leads to strong heterogeneity in helium content.关键词
四川盆地/威远气田/金秋气田/氦气成藏机制Key words
Sichuan basin/Weiyuan gas field/Jinqiu gas field/helium accumulation mechanism分类
天文与地球科学引用本文复制引用
戴鑫,施雨华,豆霜,陈双玲,张宝收,汪华,王小娟,周刚,张亚,严威..四川盆地威远气田、金秋气田氦气成藏机制[J].西北地质,2025,58(5):46-59,14.基金项目
中石油"十四五"油气资源评价课题"西南油气田探区"十四五"油气资源评价"(2023YQX20112)资助. （2023YQX20112）
