Date of Graduation

2001

Document Type

Thesis

Degree Type

MS

Committee Chair

Shahab Mohagehgh

Abstract

Reservoir characterization in the Cotton Valley formation has always been a challenge for the Engineers, Geologist and Geophysists because of its heterogeneity as well as for the fact that well logs and reservoir characteristics are non-correlatable from well to well. This study introduces a new technique to characterize the cotton valley reservoir. Synthetic magnetic resonance imaging logs (MRI) provide information about reservoir characteristics such as effective porosity, fluid saturation and rock permeability more accurately than conventional wireline logs. The fuzzy C- mean analysis tool is utilized to group well logs together based on similarity criteria of the reservoir formation and fuzzy curve analysis is applied to identify the most influential logs for a well. This study also demonstrates that combining fuzzy techniques with artificial neural networks will help to model a complex, poorly defined, non-linear system.

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