COX 9-12 UNIT 2
COX 9-12 UNIT 2 is a Texas oil lease in Martin County, Railroad Commission district 08, operated by Endeavor Energy Resources L.P. It has 13 wellbores on file with the Commission. Reported production runs from November 2018 to August 2026, totalling 2,354,831 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 $36.5M, with roughly $15.6M 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 44,872 barrels a month, about 3,452 per wellbore. Its strongest month on the record we hold was January 2025, at 159,106 barrels. In our own backtest, leases producing at this rate are forecast to within about 18% 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 9-12 UNIT 2
- Who operates COX 9-12 UNIT 2?
- COX 9-12 UNIT 2 is operated by Endeavor Energy Resources L.P., Railroad Commission of Texas operator number 251726.
- Where is COX 9-12 UNIT 2?
- COX 9-12 UNIT 2 is a Texas oil lease in Martin County, Texas, in Railroad Commission district 08. Its Railroad Commission lease number is 51547.
- Is COX 9-12 UNIT 2 still producing?
- COX 9-12 UNIT 2 is currently producing. The most recent month of production reported to the Railroad Commission of Texas for COX 9-12 UNIT 2 is August 2026.
- How much has COX 9-12 UNIT 2 produced?
- COX 9-12 UNIT 2 has reported 2,354,831 barrels of oil (bbl) to the Railroad Commission of Texas between November 2018 and August 2026, from 13 wellbores.
- How much is COX 9-12 UNIT 2 worth?
- The remaining production from COX 9-12 UNIT 2 is estimated to be worth about $36.5M in total as of 26 August 2026, within a range of $30.0M to $43.1M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in COX 9-12 UNIT 2 is a fraction of it. The estimate fits an Arps decline curve to the production COX 9-12 UNIT 2 has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for COX 9-12 UNIT 2 is an estimate of value, not an offer and not an appraisal.
- How much income does COX 9-12 UNIT 2 generate in a year?
- COX 9-12 UNIT 2 is forecast to net about $15.6M across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in COX 9-12 UNIT 2 receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Endeavor Energy Resources L.P. |
|---|---|
| Field | Spraberry (Trend Area) |
| County | Martin County, Texas |
| RRC district | 08 |
| Lease number | 51547 |
| Wellbores | 13 |
| Reported production | 2,354,831 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $36.5M |
Where COX 9-12 UNIT 2 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.