WINDHAM 40
WINDHAM 40 is a Texas oil lease in Midland County, Railroad Commission district 08, operated by Discovery Operating, Inc. It has 13 wellbores on file with the Commission. Reported production runs from January 2001 to August 2026, totalling 502,349 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 $1.4M, with roughly $998K 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 3,078 barrels a month, about 237 per wellbore. Its strongest month on the record we hold was October 2025, at 5,029 barrels. In our own backtest, leases producing at this rate are forecast to within about 17% 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 WINDHAM 40
- Who operates WINDHAM 40?
- WINDHAM 40 is operated by Discovery Operating, Inc., Railroad Commission of Texas operator number 220865.
- Where is WINDHAM 40?
- WINDHAM 40 is a Texas oil lease in Midland County, Texas, in Railroad Commission district 08. Its Railroad Commission lease number is 36561.
- Is WINDHAM 40 still producing?
- WINDHAM 40 is currently producing. The most recent month of production reported to the Railroad Commission of Texas for WINDHAM 40 is August 2026.
- How much has WINDHAM 40 produced?
- WINDHAM 40 has reported 502,349 barrels of oil (bbl) to the Railroad Commission of Texas between January 2001 and August 2026, from 13 wellbores.
- How much is WINDHAM 40 worth?
- The remaining production from WINDHAM 40 is estimated to be worth about $1.4M in total as of 26 August 2026, within a range of $1.2M to $1.7M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in WINDHAM 40 is a fraction of it. The estimate fits an Arps decline curve to the production WINDHAM 40 has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for WINDHAM 40 is an estimate of value, not an offer and not an appraisal.
- How much income does WINDHAM 40 generate in a year?
- WINDHAM 40 is forecast to net about $998K across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in WINDHAM 40 receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Discovery Operating, Inc. |
|---|---|
| Field | Spraberry (Trend Area) |
| County | Midland County, Texas |
| RRC district | 08 |
| Lease number | 36561 |
| Wellbores | 13 |
| Reported production | 502,349 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $1.4M |
Where WINDHAM 40 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.