中国石油大学学报（自然科学版）2012，Vol.36Issue(3)：76-83,8.DOI:10.3969/j.issn.1673-5005.2012.03.012
海拉尔盆地乌南凹陷南一段高伽马砂岩成因与识别
Genesis and identification of high gamma sandstone in the first member of Nantun formation of Wunan depression in Hailar Basin
摘要
Abstract
In order to improve the accuracy of logging lithology identification of high natural gamma sandstone in Wunan depression in Hailar Basin, in terms of rock core and microscopic sections description and logging analysis, the causes and i-dentifieation of high gamma sandstones were discussed. The classification of the sandstone CNL values can provide a estimating under a certain porosity degree. The high natural gamma sandstones can be identified using deep lateral resistivity ( DLL), micro lateral resistivity logging ( RMLL) , DEN and AC. The research results show that the factors affecting these sandstones with high natural gamma are tuffaceous matter, clay, oil, feldspar and calcium. High natural gamma sandstones express high content of thorium or uranium from logging data. The tuffaceous matter leads to the enrichment of thorium, clay leads to the enrichment of uranium, thorium and potassium, oil leads to the enrichment of uranium, feldspar leads to the enrichment of potassium, and calcareous matter leads to the decrease of uranium content. The affecting factors of sandstone nature gamma ray are high tuffaceous matter, high feldspar and high clay ranging from edge to center of the depression.关键词
海拉尔盆地/乌南凹陷/高自然伽马砂岩/岩石成因/识别方法Key words
Hailaer Basin/ Wunan depression/ high natural gamma sandstone/ lithogenesis/ recognition method分类
能源科技引用本文复制引用
于振锋,程日辉,赵小青,孙凤贤,许中杰,沈艳杰..海拉尔盆地乌南凹陷南一段高伽马砂岩成因与识别[J].中国石油大学学报（自然科学版）,2012,36(3):76-83,8.基金项目
国家自然科学基金项目(40972074) （40972074）
吉林大学平台基地建设项目(450060326044) （450060326044）
