METHOD AND APPARATUS FOR DETERMINING FORMATION AND FLUID PROPERTIES

摘要

A downhole tool and method for determining a parameter of a formation as a function of radial distance from the borehole into the formation. The tool comprising a nuclear source 302 for irradiating the formation and a plurality of sensors 202, 302, 203 each independently measuring a density of the formation at a different radial depth into the formation. A processor combines the density measurements for determining the parameter of the formation as a function of radial distance.