Petrora

LEASES · O-8-17550 · OIL · DISTRICT 7B

Hallmark-Keel

No volume since Jan 2015

Olenox Corp. · Coleman County · Coleman County Regular field

Hallmark-Keel is an RRC oil lease (O-8-17550) in Coleman County operated by Olenox Corp., with one well completed on it.

It has reported 1.6K barrels of oil and 4.86K mcf of gas since January 1993, last reporting volume in January 2015 (statewide data runs through April 2026).

No volume was reported in the last 12 months; the last was in January 2015.

11 operators have filed production on it, most recently Olenox Corp. since December 2025.

1.6K
bbl oil, all reported
4.86K
mcf gas incl. casinghead
0
bbl oil, last 12 reported
—
vs the 12 before
1
wells completed on it
92
peak month, bbl (Jul 1994)

PDQ LEASE REPORTS · FIRST JAN 1993 · LAST VOLUME JAN 2015 · STATEWIDE DATA THROUGH APR 2026

Oil by month

Barrels reported on Form PR for the whole lease. The latest months are revised upward as late reports arrive.

Last 12 months 0 · prior 12 0

012017201820192020202120222023202420252026

Gas by month

Gas-well gas plus casinghead gas, mcf. On an oil lease all gas is reported as casinghead. The latest months are revised upward as late reports arrive.

Last 12 months 0 · prior 12 0

012017201820192020202120222023202420252026

Who reported it

Each run of months one operator filed the production report, oldest first.

  1. Subsurface ExplorationJan 1993 → Jul 1995 · 31 mo
  2. Subsurface Energy Corp.Aug 1995 → Dec 2001 · 77 mo
  3. Rockwood Resources IncJan 2002 → Jan 2010 · 97 mo
  4. Charis Oil & Gas, LLCFeb 2010 → Dec 2012 · 35 mo
  5. Cedar Ridge Energy, Inc.Jan 2013 → Jun 2013 · 6 mo
  6. Minuteman Energy, LLCJul 2013 → Feb 2015 · 20 mo
  7. Transcontinental Shale L.L.C.Mar 2015 → Feb 2016 · 12 mo
  8. Oil, Gas, Etc. LLCMar 2016 → May 2018 · 27 mo
  9. Imperator Operating, LLCJun 2018 → Feb 2019 · 9 mo
  10. Oil, Gas, Etc. LLCMar 2019 → Nov 2025 · 81 mo
  11. Olenox Corp.Dec 2025 → Jul 2026 · 8 mo

Wells on the lease

FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL

1

wells completed on the lease

NO Type on File
1

Operates them now

Petrolero Exploration Inc.
1

Newest permits

All 1 wells, searchable →

About this data

Monthly oil, gas, and casinghead from the RRC PDQ production dump, which lags the reporting month by two to three months; figures shown through Apr 2026. Wells from completion reports; operator runs from who filed each month's report.

Developers: this page as JSON is GET /v1/data/leases/tx/o-8-17550, documented in the API reference.