Patent Document ID: 6044327
Application ID: 08970171
Patent Flag: 1

Claim One:
1. A method for determining the lithology of formations surrounding an earth borehole, comprising: traversing an earth borehole with a well logging instrument and generating data with said instrument relating to the lithology of the formations surrounding said borehole as a function of depth in said borehole; generating a first lithology compositional model based upon said data to establish an upper limit of a range of values for each component of the lithology at a given depth in the borehole; and generating a second lithology compositional model based upon said data to establish a lower limit of a range of values for each component of the lithology at said given depth in the borehole, wherein the first and second models together provide a dual compositional model for establishing a complete range of possible values for each component of the lithology at a given depth in the borehole.