From the President

Dick Merkel
EnCana

As your new president, I would first like to acknowledge and thank the 2006-2007 Directors for their time and effort given to the DWLS. Similarly, I want to thank the members of the new Board for volunteering their time to our organization (in particular those who will be serving both years). Special recognition needs to be made to Dominic and Tony Holmes and Eleice Wickham for their continued service and dedication to DWLS.

The current energy boom brings with it a unique set of problems, including (but not limited to) understaffing, inexperienced staff, log QC, and petrophysical models in complex geology/mineralogy. Our common goal is the understanding of well logs and core, and the interpretation of these data to define hydrocarbons. The DWLS has always been directed to the advancement of the science of petrophysics through the education of its members. In order to meet the challenges noted above, this year the DWLS is providing its membership:

1. One day short courses in the fall and in the spring (see our website for details)
2. Monthly speakers whose topics are heavily weighted towards topics of log interpretation and petrophysical models

We hope that you take the opportunity to join us at these scheduled events and capitalize upon the networking and discussions that accompany our gatherings.

From the Vice President - Technology

Jack Bowler
Bowler Petrophysics, Inc.

My major goal this year was to line up all 9 speakers before the year starts and that has been achieved. Additionally we have two backup speakers to cover in a last minute emergency (heavy spring snowfall?).

A secondary goal is to have a heavy emphasis on geology because I have noticed that such talks seem to draw more attendees. Several presentations meet that goal although the talk title may not make that clear.

DWLS would like to thank all the speakers for volunteering to talk and for their efforts in presenting their ideas and knowledge to the DWLS community. It takes time to put a presentation together and who has much of that these days.

The first three talks deal with tight gas sands - a subject of great interest to many. Both operators developing tight gas sands and explorers looking for by-passed tight gas sands are going to like these three presentations.

Lesley Evans will lead off on September 18^th with her talk on Magnetic Imaging Results in the Williams Fork Formation, Piceance Basin, CO. This talk was a "sell out" at RMAG and now those who missed out will have a chance to hear it. Lesley may have modified her RMAG talk if time allowed so even if you heard it the first time be sure to catch it again. That is what I plan to do.

Steve Cumella will follow on October 16^th with Open-Hole or Cased-Hole Logs in Tight Gas Sands?. As you know there are more and more pulsed neutron logs being run in the Rocky Mountain tight gas sands. It will be very interesting to hear Steve's take on this subject as he has a lot of tight gas sand experience.

On November 20, our President, Dick Merkel, will discuss Using Core Data to Develop and Calibrate Petrophysical Models in Tight Gas Sandstone Reservoirs. Bring your pencil and notebook because over the years Dick has presented DWLS with ideas that can be used in our work.

Lastly, DWLS would like to thank Bob Eaton and Dominic Holmes for their creative speaker's gift idea.

From the Vice President - Membership

Bill Rodgers
Weatherford International

It's time once again to get your membership dues paid up. Here's a membership form you can fill out and send with your payment to me at:

Bill Rodgers
DWLS VP Membership
c/o Weatherford International
410 17^th St, Suite 400
Denver, CO 80202

Or bring your filled out form along with payment to the September meeting.

If you are already a lifetime member, you may want to fill out an update form if any of your contact information may have changed in the last year.

DWLS Fall Workshop – Clay Minerals and Their Effect on the Electrical Behavior of Shaly Sands

Jack Bowler
Bowler Petrophysics, Inc.

DWLS and SPWLA members, the Rocky Mountain Oil and Gas community and others from various universities are in for a treat this autumn when E. C. Thomas presents this one-day course 19 October 2007 at the Colorado School of Mines. This is a unique opportunity to hear one of the shaly sand pioneers and original thinkers present his ideas on a problem that anyone who looks at wire-line logs needs to understand.

Resistivity contrast between oil and gas zones and water zones has been the main means of identifying hydrocarbons since the inception of wire-line logs. Clay minerals can reduce that contrast and make hydrocarbon identification more difficult.

E. C. starts his course with the Periodic Chart of the Elements and works his way through clay mineral structures and winds up with methods to deal with the Clay Minerals problem. Not only is the course informative but his "brain teasers" sprinkled throughout the course keep one alert and are pretty amusing.

How do I know? I attended the sold-out course at the recent Austin SPWLA meeting and already have my check in to attend a second time at CSM. The course fee is heavily subsidized by DWLS resulting in very low cost to DWLS members (must be paid up as of May 2007). Don't procrastinate. Get your check in today. See the announcement for additional details.

From the Editor

Dominic Holmes
Digital Formation

As you can see, I have changed little in the format of the newsletter this year. Mostly due to just being too busy to play around with it. The email reminders have been simplified for various reasons, although the content is identical.

I am always open to suggestions and comments on the design, content, and email reminders from the members. That goes for the website too. Drop me an email if you have any thoughts on ways we can improve things to make it better or easier for you.

Finally, just a quick reminder that Bill Rodgers is handling the membership roster again this year. If you need to change your email address, or update your contact information in any way, please contact him directly.

"Magnetic Resonance Imaging Results in the Williams Fork Formation, Piceance Basin, CO"

Lesley W. Evans
Williams E & P

This talk is a replay of the presentation given to RMAG on May 18^th, 2007. Further emphasis on MRIL T1 and T2 modeled tool responses and further integration of Williams Fork Fm. rock types with NMR data will be given.

In 2004 Williams Exploration and Production began a comprehensive test well program to better identify pay in the Williams Fork Fm., Piceance Basin Colorado. To achieve this goal, six wells were chosen in the Grand Valley, Parachute and Rulison fields for magnetic resonance image logs, standard open hole logs and production logs. While our initial goal was one of pay and non- pay identification, magnetic resonance image logs also provided interesting insights into the pore structure at the top of continuous gas, as well as rock type changes within the continuous gas cell. By combining these data with previously obtained magnetic resonance image logs, regional pore size variations were seen. Highlights from the test wells will be shown and a brief overview of our practical experience with magnetic resonance logs will be given.

About the Speaker

Lesley Evans is a petrophysicist with Williams E&P in Denver where she is working the Piceance Basin, CO. Much of her career has been spent working tight gas plays in the Rockies, as she has also worked with Amoco Production Company and Schlumberger. She is a member of SPE, RMAG and DWLS. Lesley holds a BA from Rice University in Geology and Geophysics, a MSc from the U. Colorado, Boulder in Geology, an MBA from Erasmus University in Rotterdam, NL and she is a graduate of Amoco's Petrophysics Program, Class 30.