黄龙天然气田富氦地质条件与成藏模式  

Helium geological conditions and accumulation model of the Huanglong natural gas field,Ordos Basin

作　　者：范立勇 赵伟波 康锐 惠洁 洪思婕 刘成林[2,3] 王海东 丁振刚 FAN Liyong;ZHAO Weibo;KANG Rui;HUI Jie;HONG Sijie;LIU Chenglin;WANG Haidong;DING Zhengang(Research Institute of Exploration and Development,PetroChina Changqing Oilfield Company,Xi’an 710018,China;State Key Laboratory of Petroleum Resources and Prospecting(China University of Petroleum),Beijing 102249,China;College of Geosciences,China University of Petroleum,Beijing 102249,China)

机构地区：[1]中国石油长庆油气田公司勘探开发研究院,西安710018 [2]油气资源与探测国家重点实验室(中国石油大学(北京)),北京102249 [3]中国石油大学(北京)地球科学学院,北京102249

出　　处：《中国科技论文》2024年第9期951-961,共11页China Sciencepaper

基　　金：国家重点研发计划项目(2021YFA071900)。

摘　　要：鄂尔多斯盆地具备富氦天然气地质条件,氦气资源潜力大,但对黄龙天然气田(以下简称黄龙气田)氦气地质条件、成藏过程和机制缺乏深入分析。基于文献调研、岩心录井、测井分析、天然气组分和同位素测试,评价了黄龙气田地质条件并建立了氦气成藏模式。结果表明:黄龙气田氦气含量整体呈现南高北低,南部氦气含量峰值为0.226%,北部氦气含量峰值为0.168%,氦气含量向东逐渐降低,向西降低较快;区内存在结晶变质基底和高铀钍元素丰度的泥岩层、铝土岩层,推测为潜在氦源岩层;基底断裂与分布广泛的逆断层及构造裂缝为氦气运移优势通道;丰富的地层水和孔隙水为氦气运移提供了载体;发育有泥岩、泥质碳酸盐岩、泥质硬石膏等封闭性良好的盖层,还存在具有高剩余压力的区域性盖层;氦气成藏模式为地下水脱氦聚集。The Ordos Basin has the properly geological conditions in helium-rich natural gas and high helium resource potential,but there is a lack of in-depth analysis of the geological conditions,formation process and mechanism of helium for the Huanglong natural gas field(hereinafter referred to as Huanglong gas field).Based on literature research,core logging,logging analysis,natural gas component and isotope testing,this paper evaluated the geological conditions of Huanglong gas field and then established a helium formation model.The results show that the helium content in Huanglong gas field is high in the south and low in the north,with a peak helium content of 0.226%in the south and 0.168%in the north.The helium content decreases gradually to the east and faster to the west.There are crystalline metamorphic basement and the high uranium and thorium abundance in mudstone and bauxite for⁃mations,which are presumed to be potential helium source rock.The basement fracture,the widespread reverse faults and the tec⁃tonic fractures are all advantageous channels for helium transportation.The abundant stratigraphic water and pore water provide migratory carrier for helium transportation.There are well confined cap layers such as mudstones,muddy carbonates,muddy hard gypsums,also there are regional cap layers with high residual pressures.In conclusion,the mode of helium reservoir formation is the helium degassing from the groundwater.The understanding of helium distribution and the formation mechanism of helium in Huan⁃glong gas field has certain theoretical value and practical significance for helium exploration and development in Ordos Basin.

关 键 词：鄂尔多斯盆地 黄龙气田 氦气 天然气 成藏模式 

分 类 号：P618.13[天文地球—矿床学]