低磁场条件下天然气核磁共振特性的实验研究  

THE LABORATORY STUDIES OF NMR PROPERTIES OF NATURAL GAS IN LOW MAGNETIC FIELD

作　　者：王为民[1] 郭和坤[2] 叶朝辉[1] 

机构地区：[1]中国科学院武汉物理与数学研究所,武汉430071 [2]石油天然气集团公司中国科学院渗流力学所,廊坊065007

出　　处：《波谱学杂志》2001年第3期223-227,共5页Chinese Journal of Magnetic Resonance

摘　　要：研究天然气在低磁场条件下的核磁共振弛豫特性及含烃因子的变化对天然气的勘探和开发工作具有重要意义 ,由于受核磁共振仪器耐温、耐压条件的限制 ,这方面的研究工作非常少 ,国内还是空白 .本文在一套自行研制的耐高温、耐高压的低磁场 (磁场强度 0 .0 5 6T)核磁共振设备上 ,对我国大庆油田深层天然气的核磁共振特性进行了实验研究 ,获得了天然气的T1 弛豫时间、含烃因子随温度和压力变化的函数关系 .It is very important for natural gas exploration and development to study the NMR properties of natural gas in a low magnetic field. Few studies have been reported on this subject mainly due to the restriction of high temperature and high pressure. In this work, a home made NMR instrument, which could bear both high temperature and high pressure, was developed. The magnetic field is 0.056Tesla. The NMR properties of natural gas from deep formation of Daqing oil field were explored. The relationships among relaxation time, hydrocarbon factor, temperature, and pressure were extracted, resulting in useful information in the application of NMR logging.

关 键 词：核磁驰豫 含烃因子 天然气 低磁场 核磁共振 测井技术 

分 类 号：TE642[石油与天然气工程—油气加工工程] P618.13[天文地球—矿床学]