世界核地质科学2025，Vol.42Issue(4)：793-800,815,9.DOI:10.3969/j.issn.1672-0636.2025.04.009
中子寿命测井在鄂尔多斯盆地西南缘砂岩型铀矿勘查中的应用
The application of neutron lifetime logging the exploration of sandstone-type uranium deposits at the southwestern margin of Ordos basin
摘要
Abstract
In recent years,significant breakthroughs have been made in the exploration of sandstone-type uranium deposits in Cretaceous Huanhe formation at the southwestern margin of Ordos basin.Due to the special sedimentary environment of Cretaceous Huanhe formation in the study area,impermeable rocks are filled with non-conductive minerals such as gypsum and carbonates,making it difficult for conventional logging curves to accurately distinguish permeable and impermeable rocks.Neutron lifetime logging is widely used in oil and gas exploration and development to determine water saturation.In order to accurately distinguish permeable sandstone and impermeable mudstone or siltstone,core samples from the study area were tested for permeability and porosity,and groundwater characteristics of the ore-bearing target layer were investigated.Based on understanding of neutron lifetime logging principle,neutron lifetime logging tests were conducted for the first time in the study area.The neutron lifetime distribution characteristics of different rocks were statistically analyzed.Through borehole verification,it was found that the neutron lifetime of permeable sandstone was significantly higher than that of impermeable rocks.The neutron lifetime logging curve can effectively distinguish the permeable and impermeable rocks in the Cretaceous Huanhe formation of the study area,which provides significant reference for the geophysical logging of sandstone-type uranium deposits.关键词
中子寿命测井/鄂尔多斯盆地西南缘/环河组/砂岩型铀矿Key words
neutron lifetime logging/southwestern margin of the Ordos basin/Huanhe formation/sandstone-type uranium deposit分类
天文与地球科学引用本文复制引用
王伟,武正乾,邓小卫,刘坤鹏,高国林,王奇辉,李磊,李涛,喻腾..中子寿命测井在鄂尔多斯盆地西南缘砂岩型铀矿勘查中的应用[J].世界核地质科学,2025,42(4):793-800,815,9.基金项目
中国核工业地质局项目"鄂尔多斯盆地镇原—盐池地区铀矿资源调查评价"(编号:202115-2)、"鄂尔多斯盆地旬邑—盐池地区铀矿资源调查评价与勘查"(编号:202217)、"甘肃省镇原县新庄地区铀矿普查"(编号:202417-1)和中国核工业地质局项目"鄂尔多斯盆地南部地区铀裂变瞬发中子测井"(编号:202517-6)联合资助 Supported by joint funding from projects of China Nuclear Industry Geological Bureau"Uranium Resource Survey and Evaluation in Zhenyuan-Yanchi Area,Ordos Basin"(No.202115-2),"Uranium Resource Survey,Evaluation and Exploration in Xunyi-Yanchi Area,Ordos Basin"(No.202217),and"Uranium Ore General Survey in Xinzhuang Area,Zhenyuan County,Gansu Province"(No.202417-1)and"Uranium Ore General Survey in Xinzhuang Area,Zhenyuan County,Gansu Province"(No.202417-1)and"Uraniium Fiss Prompt Neutron Logging in the Southen Ordos Basin"(No.202517-6) （编号:202115-2）
