WELLOG OVERVIEW

Revised 06-20-2007

The information found on the following pages and included in the WELLOG webinar are for educational purposes. Because log interpretation

is based on electronic or electrical measurements, many technical issues may affect the results obtained in any well log. Final log interpretation

and analysis should be conducted by a trained professional. If possible correlation with cores removed from the well is recommended.

Professional petrophysical consultants may be found online for the purpose of log interpretation and analysis.

Links to petrophysical log analysts:

http://www.rjzpetrophysics.com

CONDITIONS OF USE:

WELLOG makes no warrantee as to the applicability of the following webinar content in any specific petrophysical environment. All log interpretation is subjective and is based on the knowledge, understanding and experience of the person performing the task of interpretation and analysis.

Part I:

Geophysical Considerations

Rock types

Reservoir characteristics

Primary Porosity

Secondary Porosity

Permeability

Saturation

The Borehole

The Borehole environment

Hydrostatic pressure

Water loss of mud