MCMASTER
MCMASTER is a Texas oil lease in Reagan County, Railroad Commission district 7C, operated by Cox, John L. It has 3 wellbores on file with the Commission. Reported production runs from November 1995 to August 2026, totalling 21,300 barrels. The lease is currently producing. Fitting a decline curve to that history and pricing the remaining production at today's forward curve values the whole lease — a 100% undivided interest — at about $82K, with roughly $14K expected over the next twelve months. An individual royalty owner receives their own decimal interest times that figure. Over the last twelve months on file it averaged 27 barrels a month, about 9 per wellbore. Its strongest month on the record we hold was August 2025, at 99 barrels. In our own backtest, leases producing at this rate are forecast to within about 45% of what they went on to produce, and that measured error is the range shown on the page rather than a confidence of our own devising.
Key facts about MCMASTER
- Who operates MCMASTER?
- MCMASTER is operated by Cox, John L., Railroad Commission of Texas operator number 185980.
- Where is MCMASTER?
- MCMASTER is a Texas oil lease in Reagan County, Texas, in Railroad Commission district 7C. Its Railroad Commission lease number is 13967.
- Is MCMASTER still producing?
- MCMASTER is currently producing. The most recent month of production reported to the Railroad Commission of Texas for MCMASTER is August 2026.
- How much has MCMASTER produced?
- MCMASTER has reported 21,300 barrels of oil (bbl) to the Railroad Commission of Texas between November 1995 and August 2026, from 3 wellbores.
- How much is MCMASTER worth?
- The remaining production from MCMASTER is estimated to be worth about $82K in total as of 26 August 2026, within a range of $45K to $119K. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in MCMASTER is a fraction of it. The estimate fits an Arps decline curve to the production MCMASTER has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for MCMASTER is an estimate of value, not an offer and not an appraisal.
- How much income does MCMASTER generate in a year?
- MCMASTER is forecast to net about $14K across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in MCMASTER receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Cox, John L. |
|---|---|
| Field | Spraberry (Trend Area) |
| County | Reagan County, Texas |
| RRC district | 7C |
| Lease number | 13967 |
| Wellbores | 3 |
| Reported production | 21,300 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $82K |
Where MCMASTER sits
Source: Railroad Commission of Texas lease production records, complete through . Figures on this page were computed on .
Production figures are as reported to the Railroad Commission of Texas. The value shown is an estimate produced by fitting a decline curve to that reported history; it is not an offer or an appraisal. How this estimate is calculated.