Patent ID: 6255819
Filing Date: 2001-07-03
Classification: G01N,G01R,G01V

Abstract:
A method for determining petrophysical properties of layered geologic formations using nuclear magnetic resonance (NMR) echo train data, comprising:classifying layers in a portion of a geologic formation into two or more discrete layer types;providing information about layer compositions in said portion of the formation based on the classified layer types;generating an NMR echo train model using the provided information about layer compositions;providing an NMR echo train log corresponding to said portion of the formation;processing the NMR echo train log using the generated NMR echo train model to obtain lithology-specific NMR echo train data representations corresponding to said two or more discrete layer types; anddetermining petrophysical properties of layers in said portion of the formation from the lithology-specific NMR echo train data representations.