Monday, June 5, 2017

Austin Chalk - South Texas, Karnes Trough Area

The map below depicts recent Austin Chalk activity in the Karnes Trough area (Karnes, Gonzalez Counties, TX).  The yellow boxes highlight active rig locations while the green provide the details on EOG's Austin Chalk completions.  EOG's Matterhorn well had a "prac IP" of 7088 bopd and 11858 mcfgd equating to 9064 boepd (Source DrillingInfo).  Their nine Austin Chalk completions in Sugarkane Field have prac IP's ranging from 157-9064.  It will be interesting to see if they can repeat these rates in other areas of the play.  Their results to the northeast in Gonzales County have prac IPs ranging from 64-795 boepd. Keep an eye on this one.


  1. Any idea how they are D&C? Traditional Austin chaulk with underbalance dual lateral or are they multi-stage facking?

  2. Kevin, it's a different approach these days. EOG is designing large fracs for the AC in South Texas. The approach is not targeting natural fractures, but high porosity charged rock.

  3. Interesting... The decline curve should not be as steep as the Austin Chalk wells that targeted natural fractures...