天然气工业2023，Vol.43Issue(12)：138-151,14.DOI:10.3787/j.issn.1000-0976.2023.12.015
氦气富集与天然气成藏差异、勘探误区
Difference between helium enrichment and natural gas accumulation and misunderstandings in helium exploration
摘要
Abstract
Helium is one of the rare strategic resources that are indispensable for the development of national defense and high-tech industries.Helium containing natural gas is still the only source of industrial helium production.Helium rich natural gas is the main source of helium,so it is easily misunderstood that helium resource can be discovered where natural gas is discovered.In fact,however,helium enrichment is quite different from natural gas accumulation,so the theories and methods for searching natural gas cannot be used to search helium.Based on the characteristics of helium enrichment,this paper summarizes the differences between helium enrichment and natural gas accumulation,systematically sorts out five major misunderstandings in helium exploration,and finally proposes specific helium exploration suggestions.And the following research results are obtained.First,helium enrichment is significantly different from natural gas accumulation in terms of source,generation mechanism,migration and accumulation process(including primary and secondary migration modes),structural setting and groundwater activity degree.Second,the current five major misunderstandings in helium exploration are as follows:helium can be searched in the sweet spots of natural gas enrichment;better caprocks are needed for helium rich gas reservoirs;all the gas reservoirs lying above the ancient basement can be helium rich;helium can be searched in coalbed methane;helium can be searched in volcanic reservoirs.In conclusion,to search helium rich resources,it is necessary to evade the exploration areas where helium is diluted seriously and the areas where natural gas charging intensity is high,and avoid searching helium in coalbed methane and volcanic gas reservoirs.What's more,helium exploration shall get free from oil & gas exploration ideas,and it is necessary to select the areas reasonably based on helium enrichment conditions.Helium usually gets enriched in the gas reservoir at the structural high of the same horizon under the control of basement fault and ancient formation water system,and the gas bearing areas satisfying these conditions will be the favorable areas of helium exploration.关键词
氦气/氦气富集/天然气成藏/差异/勘探误区/盖层/构造高部位/基底断裂Key words
Helium/Helium enrichment/Natural gas accumulation/Difference/Exploration misunderstanding/Caprock/Structural high/Basement fault引用本文复制引用
秦胜飞,陶刚,罗鑫,郭艳波,龚德瑜..氦气富集与天然气成藏差异、勘探误区[J].天然气工业,2023,43(12):138-151,14.基金项目
国家自然科学基金专项项目"中西部叠合盆地氦气富集机理与资源潜力"(编号:42141022)、国家自然科学基金面上项目"富氦煤层气和页岩气藏氦气富集机理"(编号:42272189)、中国石油集团关键核心攻关项目"氦气资源评价与低成本提氦及运储关键技术研究"(编号:2021ZG13)、中国石油天然气股份有限公司项目"新能源综合开发利用关键技术研究"(编号:2022KT2602). （编号:42141022）
