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核磁测并从提出到商业化经历了近半个世纪的漫长过程。目前,世界上能够提供核磁测井服务的主要有俄罗斯以及Schlumberger和NUMAR公司。在技术方案上,既有基于“预极化-地磁场自由进动测量”的初始方案,也有利用Inside-out概念和偶极梯度场对自旋回波串进行观测的新方法。未来的核磁测井正朝着多核、多频、可组合,以及提高测速、增加探测深度、改善纵向分辨能力的方向发展。回顾了核磁测井技术的发展过程,对比当前国际上已有的3种核磁测井技术方案,对如何发展我国的核磁测井技术提出了一些建议。
Nuclear magnetic measurement and from the proposed commercial development has gone through a long course of nearly half a century. At present, Russia and Schlumberger and NUMAR are the two major suppliers of NMR logging services in the world. In terms of technical solutions, there are both original schemes based on “prepolarization - free precession of geomagnetic field” and new methods for observing spin echo trains using the Inside-out concept and dipole gradient field. Future NMR logging is moving in the direction of multi-core, multi-frequency, combinability, as well as speeding up, increasing the depth of detection and improving vertical resolution. Recalling the development of nuclear magnetic logging technology, compared with the current three international nuclear magnetic logging technology programs, how to develop our NMR logging technology put forward some suggestions.