Well logging method and apparatus for NMR and resistivity measur

Details Well logging method and apparatus for NMR and resistivity measur Well logging method and apparatus for NMR and resistivity measur

1996-12-04

1998-11-03

O'Shea, Sandra L.

Electricity: measuring and testing

Particle precession resonance

Using well logging device

G01V 332

Patent

active

058314334

ABSTRACT:
A method is disclosed for determining a nuclear magnetic resonance characteristic and the resistivity of earth formations surrounding a borehole, including the following steps: passing a logging device through the borehole; producing, at the logging device, a static magnetic field; producing, at the logging device, electromagnetic energy having a field component in the formations that is orthogonal to the static magnetic field; receiving, at the logging device, electromagnetic energy that has passed through said formations; and determining, from the received electromagnetic energy, the nuclear magnetic resonance characteristic of the formations and the resistivity of the formations.

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