LEASES · O-2-3981 · OIL · DISTRICT 02
O'Brien, J. M.
ReportingDorchester Operating Company LLC · Refugio County · Greta (4400) field
O'Brien, J. M. is an RRC oil lease (O-2-3981) in Refugio County operated by Dorchester Operating Company LLC, with 10 wells completed on it.
It has reported 380K barrels of oil and 252K mcf of gas since January 1993, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 4.83K barrels of oil, down 15% on the year before; the lease peaked at 3.58K barrels in January 2006.
7 operators have filed production on it, most recently Dorchester Operating Company LLC since December 2020.
- 380K
- bbl oil, all reported
- 252K
- mcf gas incl. casinghead
- 4.83K
- bbl oil, last 12 reported
- -15%
- vs the 12 before
- 10
- wells completed on it
- 3.58K
- peak month, bbl (Jan 2006)
PDQ LEASE REPORTS · FIRST JAN 1993 · 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.
Last 12 months 4,832 · prior 12 5,674(-15%)
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 1,988 · prior 12 2,743(-28%)
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.
- Exxon Corp.Jan 1993 → Mar 2000 · 87 mo
- Exxon Mobil CorporationApr 2000 → Oct 2001 · 19 mo
- Primrose Operating CompanyNov 2001 → Mar 2007 · 65 mo
- Cambrian Management LtdApr 2007 → Sep 2007 · 6 mo
- Cambrian Management, Ltd.Oct 2007 → Oct 2010 · 37 mo
- Acock/Anaqua Operating Co., LPNov 2010 → Nov 2020 · 121 mo
- Dorchester Operating Company LLCDec 2020 → Jul 2026 · 68 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
10
wells completed on the lease
- NO Type on File
- 7
- Plugged
- 3
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-2-3981, documented in the API reference.