COX 21
COX 21 is a Texas oil lease in Glasscock County, Railroad Commission district 08, operated by Burleson Petroleum, Inc. It has 3 wellbores on file with the Commission. Reported production runs from July 2011 to August 2026, totalling 271,869 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 $2.2M, with roughly $479K 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 445 barrels a month, about 148 per wellbore. Its strongest month on the record we hold was May 2016, at 2,592 barrels. In our own backtest, leases producing at this rate are forecast to within about 22% 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 COX 21
- Who operates COX 21?
- COX 21 is operated by Burleson Petroleum, Inc., Railroad Commission of Texas operator number 109255.
- Where is COX 21?
- COX 21 is a Texas oil lease in Glasscock County, Texas, in Railroad Commission district 08. Its Railroad Commission lease number is 41648.
- Is COX 21 still producing?
- COX 21 is currently producing. The most recent month of production reported to the Railroad Commission of Texas for COX 21 is August 2026.
- How much has COX 21 produced?
- COX 21 has reported 271,869 barrels of oil (bbl) to the Railroad Commission of Texas between July 2011 and August 2026, from 3 wellbores.
- How much is COX 21 worth?
- The remaining production from COX 21 is estimated to be worth about $2.2M in total as of 27 August 2026, within a range of $1.7M to $2.6M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in COX 21 is a fraction of it. The estimate fits an Arps decline curve to the production COX 21 has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for COX 21 is an estimate of value, not an offer and not an appraisal.
- How much income does COX 21 generate in a year?
- COX 21 is forecast to net about $479K across the whole undivided lease over the twelve months following 27 August 2026, before income tax. A royalty owner in COX 21 receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Burleson Petroleum, Inc. |
|---|---|
| Field | Garden City, S. (Wolfcamp) |
| County | Glasscock County, Texas |
| RRC district | 08 |
| Lease number | 41648 |
| Wellbores | 3 |
| Reported production | 271,869 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $2.2M |
Where COX 21 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.