COOK RANCH 85WS
COOK RANCH 85WS is a Texas oil lease in Shackelford County, Railroad Commission district 7B, operated by Stasney Well Service, LLC. It has 14 wellbores on file with the Commission. Reported production runs from December 2013 to August 2026, totalling 41,043 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 $377K, with roughly $72K 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 104 barrels a month, about 7 per wellbore. Its strongest month on the record we hold was March 2017, at 1,117 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 COOK RANCH 85WS
- Who operates COOK RANCH 85WS?
- COOK RANCH 85WS is operated by Stasney Well Service, LLC, Railroad Commission of Texas operator number 816067.
- Where is COOK RANCH 85WS?
- COOK RANCH 85WS is a Texas oil lease in Shackelford County, Texas, in Railroad Commission district 7B. Its Railroad Commission lease number is 31366.
- Is COOK RANCH 85WS still producing?
- COOK RANCH 85WS is currently producing. The most recent month of production reported to the Railroad Commission of Texas for COOK RANCH 85WS is August 2026.
- How much has COOK RANCH 85WS produced?
- COOK RANCH 85WS has reported 41,043 barrels of oil (bbl) to the Railroad Commission of Texas between December 2013 and August 2026, from 14 wellbores.
- How much is COOK RANCH 85WS worth?
- The remaining production from COOK RANCH 85WS is estimated to be worth about $377K in total as of 26 August 2026, within a range of $294K to $460K. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in COOK RANCH 85WS is a fraction of it. The estimate fits an Arps decline curve to the production COOK RANCH 85WS has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for COOK RANCH 85WS is an estimate of value, not an offer and not an appraisal.
- How much income does COOK RANCH 85WS generate in a year?
- COOK RANCH 85WS is forecast to net about $72K across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in COOK RANCH 85WS receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Stasney Well Service, LLC |
|---|---|
| Field | Cook Ranch |
| County | Shackelford County, Texas |
| RRC district | 7B |
| Lease number | 31366 |
| Wellbores | 14 |
| Reported production | 41,043 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $377K |
Where COOK RANCH 85WS 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.