Time dependent measurement of formation properties using pulsed neutron generators

摘要

An apparatus and method for estimating at least one parameter of interest of an earth formation including an estimation of the parameter of interest using a time-dependent ratio of information obtained from at least one neutron detector through the exposure of the earth formation to a radiation source, particularly a pulsed nuclear source. The apparatus includes a processor and storage subsystem with a program that, when executed, implements the method. Also, an apparatus and method for estimating at least one parameter of interest of an earth formation including an estimation of the parameter of interest using a first component and a second component of an information set obtained using a single radiation detector.

主权项

1. A method for estimating at least one parameter of interest of a material in a volume of interest, comprising:
using a processor for estimating at least one parameter of interest using a slope of a time-dependent ratio curve at at least one point, the time-dependent ratio curve based on information acquired from at least one neutron detector and a second detector, wherein the information relates to neutrons and wherein a portion of the information is acquired before a thermalization period associated with the neutrons.