Monday, March 4, 2013

EOG: Dupuy 20H-1 and Gauthier 14H-1 Evaluation

Last week I posted the 20 day production average for the EOG Gauthier 14H-1. On Friday, the offical initial potential was released on SONRIS:
COMP 01/31/13: OIL, TUSCALOOSA MARINE SHALE, 218 BOPD, 196.6 MCFD, GOR 899, CK 12, GVTY 43.47, BWD 228, BS&W 51%, FP 1084, CP 1084, PERFS: 14407'-19091'

This result is very surprising.  I predicted an IP30 for the Gauthier of 665 boepd. With the 20 day average at 224 barrels of oil (not including gas), I'm likely to be quite a ways off on my estimate.  Porosity or sonic logs have not been released for either the Dupuy 20H-1 or the Gauthier 14H-1, but the cross section below presents the gamma ray and deep induction logs.  While the Gauthier had less "high resistivity", I believed that the increase in depth and more southern position would result in an improved rate due to higher pressure, more gas, and more calcite.  Interesting enough, the oil gravity of the two wells is almost the same.

The Gauthier has 37% less resistivity thickness and the IP is 48% less than the IP30 of the Dupuy.  Not perfect consistency, but if the porosities of the two wells are similar, the results start to make sense.  The gamma ray at the base of the TMS in the Dupuy indicates more silt.  The resistivity in the lower part of the TMS in the Gauthier has lower resistivity.  Both points support the resulting rates.

The map below presents an isopach on the "feet of TMS resistivity > 5 ohm-m".  As I've stated many times, the Passey "Delta-Log-R" is a much better parameter to map because it includes porosity.  Since I don't have sonics on the two EOG wells, I've presented this map that provides control points for both EOG wells.  The Dupuy, with 127' of resistivity, is anomalously thick for the local area.  The contours indicate a northwest-southeast trending "tongue".  As stated in my post last week, EOG might be defining the western boundary of the play.

Just west of the Dupuy well, historical vertical wells indicate a drop in resistivity thickness.  Halcon, on their earnings call last week, stated that the Broadway H-1 has 120' of pay.  Due to the lack of well control near that well, it's possible that another "thick" occurs.  Based on the well control that I've evaluated, I conclude that the results would be less than the EOG wells.  We'll see.

1 comment:

  1. I certainly have missed your great posts lately. All of the great information that you have posted over the last year or so has been a great learning experience. Thanks.