Nuclear magnetic resonance logger probe while drilling and nuclear magnetic resonance logger while drilling

Abstract

The invention provides a nuclear magnetic resonance logger probe while drilling and a nuclear magnetic resonance logger while drilling. The nuclear magnetic resonance logger while drilling comprises a probe framework, wherein a slurry pipe penetrates through the center of the probe framework; in the probe framework, a first annular magnet and a second annular magnet are sleeved on the slurry pipe and all axially magnetized, and one ends of the first magnet and the second magnet, which have the same polarity, are correspondingly arranged; an antenna for forming a pulsed magnet field is fixedly embedded at a middle position on the peripheral side wall of the probe framework; and at least one pair of annular focusing magnet is coaxially sleeved on the slurry pipe and between the first magnet and the second magnet, and two focusing magnets which form each pair of focusing magnet are symmetrical to each other by the middle section of the antenna, and are radially magnetized. The nuclear magnetic resonance logger probe while drilling can increase the vertical extension length of a sensitive area, so the measurement signal to noise ratio and the precision of the measurement result are improved.

Description

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AI Technical Summary

Benefits of technology

This patented device increases the size of an active region where measurements are made on samples from subsurface formations like oil or gas wells without being affected with changes caused by rotating tools used for drilling operations. It reduces the amount of data needed per unit volume compared to traditional methods such as scanning electron microscopy (SEM) techniques.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the quality of measurements made from tools called neutronic oscillators or atomic force microscopies (AFM). These instruments use strong electromagnetic fields to stimulate specific parts within the earth's crust surrounding it with high levels of energy. However, these techniques require long periods before they become effective because they involve measuring changes caused by the presence of certain substances near the borehole wall. Additionally, current methods result in poorly measured values when there are multiple layers deep inside the ground being studied.

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