快速核磁共振测井实现方法的研究

RESEARCH ON THE METHODS FOR THE REALIZATION OF FAST NUCLEAR MAGNETIC RESONANCE LOGGING

测井速度慢一直是核磁共振测井所面临的主要困难之一 .对核磁共振测井仪器磁体系统的设计作适当改进 ,无疑是解决该问题的一条有效途径 .有鉴于此 ,本文从理论上研究和推演出了两种快速核磁共振测井实现方法 (预极化方法与加速极化方法 ) ,它们对于核磁共振测井仪器的磁体系统设计具有参考价值 .计算和分析证明 ,采用这两种方法确实有助于提高核磁共振测井速度 .

Low logging speed is one of the main problems faced by nuclear magnetic resonance logging. A useful way to solve this problem is to make proper improvements on the design of the magnet system of the nuclear magnetic resonance logging instrument. In view of this, two realization methods of fast nuclear magnetic resonance logging (pre polarization method and accelerated polarization method) have been theoretically studied and derived in this article. They are helpful for the design of the magnet system of the nuclear magnetic resonance logging instrument. Calculations and analyses show that the two methods can really be of service to the improvement of logging speed. \;