宽能域中子伽马能谱测井技术及其应用

Wide field neutron-gamma spectrum logging and its application

宽能域中子伽马能谱测井是一种脉冲中子测井技术,通过记录中子与地层作用的俘获伽马射线和自然伽马放射性的全伽马射线谱,经过解谱得到地层元素含量及地层密度,并计算剩余油饱和度。介绍了宽能域中子—伽马测井原理、解释方法,并结合实例认为,该项技术在确定砂泥岩剖面的储层骨架和泥质的矿物成分及其含量、储层物性、剩余油饱和度等方面具有独特的优势。

Wide field neutron-gamma spectrum logging is a kind of pulsed neutron logging technology. Firstly, record the total gam-ma ray spectrum of capture gamma ray caused by the interaction between neutron and formation and natural gamma radioactivity, and then parse spectrum to obtain formation element content and formation density and calculate remaining oil saturation. In this ar-ticle, wide energy field neutron-gamma spectrum logging principle and interpretation methods were proposed. Combined with ex-amples, this technology was considered to have unique advantages in determining the reservoir skeleton of sand-shale profile and the aspects of mineral composition, contents, reservoir properties and remaining oil saturation of mud.