Quick Guide to Carbonate Well Log Analysis with Flow Chart, Case Studies and Problems

This one-day course in carbonate log analysis is built around a Flow Chart for Carbonate Well Log Analysis. The flow chart is designed so the user can determine carbonate pore type or types, and if the carbonate is water-wet or oil-wet using comparisons of nuclear porosity/sonic porosity/resistivity porosity plus comparisons of Archie (a=1,m=n=2) and Ratio Water Saturations. Next, on the flow chart the moveable hydrocarbon index (Sw/Sxo) and bulk volume water (BVW) values are used to determine if the carbonate reservoir is hydrocarbon or water productive. The final steps on the flow chart are the additional techniques that are used in the final analysis of carbonate reservoirs. The basic principles of carbonate well log analysis will be outlined, as well as critical cut-off values, and how to use the flow chart. Nine problems will be presented to illustrate the application of the flow chart in carbonate well log analysis. Using the log analysis of each of the nine problems along with The Flow Chart for Carbonate Well Log Analysis, the following questions will be presented on a work sheet: 1.) pore type or types, 2.) water-wet or oil-wet, and 3.) hydrocarbon, water-cut hydrocarbons or water productive.

George Asquith, Ph.D.
Pevehouse Chair of Petroleum Geology. He is a Professor of Geosciences and co-director of the Center for Applied Petrophysical Studies at Texas Tech University. Twenty- five years of petroleum industry experience that included research geologist Atlantic-Richfield Co., staff geologist ALPAR Resources, chief geologist Search Drilling Co., district geologist Pioneer Production Corp., and project leader Mesa Limited Partnerships. He has published one hundred and twenty publications, including 5 books in the fields of petrophysics, carbonate and clastic sedimentation/petrology, and computer geology.

Dr. Asquith received the Distinguished Service Award from the WTGS 1999, and the Distinguished Lecturer for the Society of Professional Well Log Analysts (1991-1992 and 1994-1995). He was a lecturer for the AAPG Subsurface Carbonate Depositional Modeling School (1980-1986) and received the Monroe Cheney Science Award from the Southwest AAPG 2001.


At the conclusion of this course in advanced petrophysics the student will be able to do the following:

Scan a well log and identify any porous and permeable zones (reservoirs) that have the potential to produce hydrocarbons using resistivity invasion profiles.

Determine the lithology (sandstone, limestone or dolomite), the porosity.

Determine carbonate pore type and wettability of a carbonate reservoir.

After determining carbonate pore type, be able to determine if it is hydrocarbon productive using the DEW PLOT and the correct Archie water saturation equation.

At the end of the course they will be able to determine the hydrocarbon productive potential of the complex carbonate reservoirs (oil, gas, water).

G032132Q Dec 10 8:00 am - 5:00 pm
Tue  $425.00
($450.00 out-of-state)
Registered: 9 8.0 Hours

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and associate and baccalaureate degrees. Contact the Commission on Colleges at 1866 Southern Lane, Decatur, Georgia 30033-4097
or call 404-679-4501 for questions about the status of Midland College.

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