Tuesday, May 16, 2017

Austin Chalk - Log Analyis Comparison


With EOG's recent leap over to Louisiana to test their new Austin Chalk frac design, it might be beneficial to compare the log analysis from each area.  All three areas compared below have a plethora of historical vertical wells to use for analysis.

EOG's recent "monster" Austin Chalk wells are located in the Karnes Trough of Karnes County, Texas. 

EOG Resources - Austin Chalk competions - Karnes County, Texas
The figures below present a log analysis comparison using Exxon's Passey Log Method which presents a log-calculated total organic carbon (TOC) value. This method has been proven to work across most of the unconventional plays in the U.S.

For an overview of the method, here's an excellent paper from Thomas Bowman:
http://www.searchanddiscovery.com/pdfz/documents/2010/110128bowman/ndx_bowman.pdf.html

EOG has also been leasing on the county line between Fayette and Lavaca Counties. The figures below compare three wells from Karnes, Fayette/Lavaca, and Avoyelles Parish. 

For comparison, a Passey thickness (DLogR > 1.0) and DLogR "mean" were calculated.  Higher DLogR indicates higher TOC.  The mean DLogR values range from 1.09-1.26 with Avoyelles being the highest at 1.26. Thicknesses range from 174'-187' with Karnes County being the highest.

As more wells are drilled, a tighter calibration can be made.





Wednesday, May 3, 2017

EOG Returns to Louisiana Expanding Their Austin Chalk Exploration Plan

EOG Resources has been making some extraordinary Austin Chalk completions in the Karnes Trough of South Texas. Under their service provider's entity, Sentry Energy Services, LLC, they have filed a Louisiana Austin Chalk permit in North Bayou Jack Field.  On the ground intel indicates that a total of 10 permits have been filed in Avoyelles and St. Landry Parishes.  This first permit will be drilled as a lease well.

In EOG's February 27, 2017 quarterly presentation, they noted their game plan to include "capture new premium plays through organic exploration". This appears to be part of that plan.

The Sentry Energy Services LLC Eagles Ranch 14H-1 has a measured depth planned of 21,900' with a TVD of 16,720'.  In South Texas, the TVD of the completions have ranged from 10,500-12,150'.  The Eagle Ranch well plan represents a signficant increase in depth to drill and complete in. If anyone can succeed at this, it will be EOG Resources.  I consider them to be the best unconventional operator in the U.S.

More details to follow.