LEASES · O-9-15583 · OIL · DISTRICT 7C
ANN29
COG Operating LLC · Upton County · Spraberry (Trend Area) field
Ann29 is an RRC oil lease (O-9-15583) in Upton County operated by Cog Operating LLC, with 2 wells completed on it.
It has reported 160K barrels of oil and 333K mcf of gas since August 2004, last reporting volume in April 2026 (statewide data runs through April 2026).
It reported 4.18K barrels of oil in the 12 months through April 2026, down 48% on the year before; the lease peaked at 2.73K barrels in May 2009.
2 operators have filed production on it, most recently Cog Operating LLC since January 2009.
- 160K
- bbl oil, all reported
- 333K
- mcf gas incl. casinghead
- 4.18K
- bbl oil, 12 months through Apr 2026
- -48%
- vs the 12 before
- 2
- wells completed on it
- 2.73K
- peak month, bbl (May 2009)
PDQ LEASE REPORTS · FIRST AUG 2004 · LAST VOLUME APR 2026 · 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.
12 months through Apr 2026 4,176 · prior 12 7,959(-48%)
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.
12 months through Apr 2026 14,179 · prior 12 16,264(-13%)
Decline curve
None shown. Petrora fits an Arps curve only when the last ten years of oil reports follow one decline closely enough to project (R² of 0.7 or better over at least a year since the peak). This lease's recent history does not, so a projection would be a guess dressed as a number.
Who reported it
Each run of months one operator filed the production report, oldest first, with what it reported in them.
- Henry Petroleum LPAug 2004 → Dec 2008 · 53 mo50.5K bbl oil · 82.3K mcf gas
- COG Operating LLCJan 2009 → Jul 2026 · 211 mo109K bbl oil · 251K mcf gas
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
2
wells completed on the lease
- Producing
- 2
Operates them now
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-9-15583, documented in the API reference.