测井技术2025，Vol.49Issue(4)：565-579,15.DOI:10.16489/j.issn.1004-1338.2025.04.009
基于自然伽马测井的鄂尔多斯盆地庆阳地区氦气资源评价
Helium Resource Evaluation in the Qingyang Area of the Ordos Basin Based on Natural Gamma Logging
摘要
Abstract
To explore the contribution of helium generation from sedimentary rocks to helium reserves in the Qingyang area of the Ordos basin,natural gamma logging technology is used to reflect the abundance of radioactive elements in rocks by detecting the natural radioactive intensity of U,Th and K in the formation.Combined with core sampling and laboratory energy spectrum analysis,the contents of U and Th elements are calibrated and the natural gamma logging values are fitted to calculate the helium generation amount.The logical chain of"radioactive element abundance—helium generation rate—cumulative amount"is used to evaluate the helium generation potential of potential helium source rocks.Logging data from 23 wells,along with data on formation thickness,density,and area,are used to quantitatively assess the total helium resource generation from major sedimentary rocks in the study area,which is compared with the conventional component method.The research results show that:①The helium generation potential of different lithologies is bauxite>mudstone>sandstone,and that of different horizons is Taiyuan formation>Shan 2 member>He 8 member ≈ Shan 1 member.②The total helium generation from sandstone horizons of He 8 member and Shan 1 member in the Qingyang area is 0.911×108 m3,that from mudstone horizon of Shan 2 member is 11.116×108 m3,that from bauxite horizon of Taiyuan formation is 4.431×108 m3,with a total of 1.646×109 m3,and the Heshui area and its surrounding regions have high helium generation potential.③The calculated helium generation potential of sandstone in Shan 1 member is slightly higher than the measured helium content,the calculated value of bauxite in Taiyuan formation is close to the measured value,the calculated value of He 8 member is significantly lower than the measured value,and the total helium generated by the sedimentary rock series in the study interval is higher than the measured helium content in the Qingyang gas field.④The genetic method can quantify the helium resource generation,predict resources in undeveloped areas,and reduce exploration risks,but it is highly dependent on data and may overestimate resources,the component method can directly calculate recoverable resources but cannot dynamically evaluate gas reservoirs or predict undeveloped horizons.It is concluded that the helium generated by the sedimentary rock series can be the main helium source rock.The genetic method,based on the analysis of the genetic mechanism of helium resources,can calculate the theoretical resource amount more accurately and can be used for preliminary prediction of favorable helium exploration areas.关键词
地质评价/氦气资源评价/自然伽马测井/生氦潜量/鄂尔多斯盆地/庆阳地区/沉积岩Key words
geological evaluation/helium resource evaluation/natural gamma logging/helium generation potential/Ordos basin/Qingyang area/sedimentary rock分类
天文与地球科学引用本文复制引用
唐敏,郝乐伟,康锐,范立勇,李小燕,马晓峰,陶辉飞..基于自然伽马测井的鄂尔多斯盆地庆阳地区氦气资源评价[J].测井技术,2025,49(4):565-579,15.基金项目
中国石油天然气股份有限公司关键核心项目"氦气资源评价与低成本提氦及运储关键技术研究"(2021ZG13) （2021ZG13）
中国科学院"西部之光"人才培养引进计划资助项目 （）
