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Our Next Luncheon Talk

(11:30 Reception; 11:45 Lunch; 12:15 Talk)


The next talk of the 2017-2018 RMS-SEPM Luncheon Lecture Series will be held on October 31st, 2017. (Halloween costumes encouraged)!

Steve Cumella, Consulting Geologist to Whiting Petroleum Corporation

Fun Things to Do with Digital Logs in Your Spare Time


11:30 Reception, 11:45 Lunch, 12:15 Talk
at the
Wynkoop Brewing Company
1634 18th St., Denver, CO

The cost is $25.00 for current members and $35.00 for non-members ($10 of which pays for an annual membership in the RMS-SEPM). Unemployed individuals may sign up for lunch for just $10.00. Persons who do not wish to have lunch are welcome for a $10.00 fee. Walk-ins may purchase a lunch for the standard fees ($25.00 or $35.00) although quantities are limited. Walk-ins without a lunch are charged a $10.00 fee.

Please submit reservations by 10:00 a.m., the Friday before the talk.

After the reservation deadline, you may attend the talk for a $10.00 "walk-in" fee. Reservations may be secured online, by e-mail at
or by calling Jason Eleson at 281-382-1839


Robust digital-log datasets allow the subsurface to be creatively imaged using cross sections with single-track color-filled log displays. Furthermore, simple processing of a log can reveal interesting data content not readily visible in normal log displays. For example, the large-scale depositional architecture of sedimentary sequences can be seen in cross sections constructed from gamma-ray logs smoothed over intervals of a hundred feet or so. Another example is using the first derivative of the temperature curve to reveal subtle changes in gradient that result from different thermal conductivities of rocks and the fluid in the rocks. Neutron-log cross sections can indicate gas bearing horizons. Resistivity cross sections can show resistivity reversals that indicate the transition from wet to dry gas. Sonic log cross sections can indicate the presence of overpressured parts of a basin. And the list goes on.
The smoothed gamma-ray cross section of the Mesaverde in the southern Piceance Basin shown below is constructed from hundreds of smoothed gamma-ray logs along four different line-and-corridor segments. Warm colors are low gamma ray. The bright-red marine shorefaces in the lower right prograded during times of low accommodation. These intervals can be traced landward to amalgamated fluvial channel sandstones that are also the result of periods of low accommodation. The low net-to-gross interval in the middle of the cross section acts as a top seal to the Mesaverde gas accumulation in much of the southern Piceance.



Speaker Biography:

Steve Cumella is a consulting geologist in Denver, Colorado, working primarily for Whiting since 2014. He received his bachelors and masters in geology at University of Texas at Austin and started his career with Chevron in 1981. Steve worked the Piceance Basin and other Rocky Mountain basins at Barrett Resources, Williams, Bill Barrett Corporation, and Endeavour International. He was awarded Rocky Mountain Association of Geologists’ Outstanding Scientist Award in 2005 and AAPG’s Robert H. Dott, Sr. Memorial Award for Best Special Publication in 2010. He was an AAPG Distinguished Lecturer in 2011. He is past executive editor of the Mountain Geologist and was president of the Grand Junction Geological Society in 1991. Steve has authored several publications, given numerous presentations, and led several fieldtrips.


Tentatifve Speakers List

Click on the talk title for a PDF version of the abstract.


Sep 26

Ali Jaffri, Applied Stratigraphix

Our Belief in Benches; Will it Ever Go Away? A Sequence Stratigrapher's Perspective on Layer-Cake Stratigraphy

Oct 31

Steve Cumella, Whiting Consultant

Fun Things to Do with Digital Logs in Your Spare Time

Nov 28

Sven Egenhoff, CSU

What is so Special about Shales? Concepts, Questions, and Problems (and, a few Answers).

Dec   Break

Jan 31

Donna Anderson

Paleozoic of Wyoming

Feb 28

Larry Rasmussen

Mar 28

Mike Gardner

Apr 25 TBD  
Jun 6 TBD  


In order to keep our Luncheon Program profitable and operating on schedule,
the RMS-SEPM Board has adopted the following guidelines for reservations and seating at the Wynkoop:

  • Reservations for this Luncheon Talk will be closed at 10:00am on Friday, before the talk. (No reservations are needed for walk-ins.)