Patent ID: 6737864
Filing Date: 2004-05-18
Classification: G01R,G01V

Abstract:
A method for analyzing formation fluids in a borehole environment, comprising the steps of:(a) introducing formation fluids in a flow-through vessel located in the borehole; (b) generating a substantially uniform static magnetic field in the vessel with a defined magnetic field direction; (c) generating pulsed oscillating magnetic fields for exciting nuclei of formation fluids in a first portion of the vessel, said oscillating fields having a magnetic direction substantially perpendicular to the direction of the static magnetic field; (d) receiving nuclear magnetic resonance (NMR) relaxation signals from excited nuclei of the fluid in a second portion of the vessel, smaller than the first portion; and (e) analyzing the received signals to determine fluid properties at any flow rate of the formation fluids in the vessel below a predetermined non-zero threshold.