核磁测井仪设计的进展  

New Advances in the Design of Nuclear Magnetic Resonance Logging Tool.

作　　者：梅忠武[1] 莫修文[1] 李舟波[1] 

机构地区：[1]长春科技大学地球物理系

出　　处：《测井技术》1998年第1期57-61,共5页Well Logging Technology

摘　　要：核磁测井与实验室ＮＭＲ研究的条件显著不同，要使核磁测井有足够的信噪比，关键问题是选择合适的磁场设计及测量方案。核磁测井仪中多采用预极化方式或自旋回波法，所用的磁场已从最初的地磁场演变到现在所用的各种人工磁场，所用的测量方式要与采用的磁场设计相适应。现代核磁测井的测量技术已基本与实验室技术一致，核磁测井仪获取信息的能力也有了很大发展。The environment of NML is quite different from that of NMR experiment in laboratory. In order to achieve the needed signal to noise ratio, the key point is to choose a suitable design scheme of magnetic field and measurement method. Pre polarizing and spin echo method are often used in NML tool, and the magnetic field used has been changed from primitive earth magnetic field to man made magnetic field. The measurement method should match the mangetic field. In general, the measurement technique in NML has already been the same as that in laboratory, and the data acquisition ability of NML tool has been developed greatly.

关 键 词：核磁共振 核磁测井仪 磁场 弛豫 测量 

分 类 号：P631.83[天文地球—地质矿产勘探]