Patent ID: 6344746
Filing Date: 2002-02-05
Classification: G01V

Abstract:
A method for determining a property of interest of earth formations penetrated by a borehole, said property experiencing change in the event of invasion of a borehole fluid into said formations over a period of time, the method comprising:(a) acquiring at a first epoch a plurality of raw measurements indicative of said property of interest, said first plurality of measurements having a first level of resolution; (b) acquiring at at least a second epoch a plurality of raw measurements indicative of said property of interest, said plurality of measurements at the second epoch having a second level of resolution, said property of interest at the second epoch being different from said property at the first epoch in the event of occurrence of said invasion of borehole fluids between the first and second epochs; and (c) simultaneously inverting parameter values derived from the first and second plurality of raw measurements for determining said property at the first epoch and the at least second epoch.