THE SPHINX
THE SPHINX is a Texas oil lease in Reeves County, Railroad Commission district 08, operated by Cog Operating LLC. It has 8 wellbores on file with the Commission. Reported production runs from November 2017 to August 2026, totalling 3,417,514 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 $33.8M, with roughly $9.0M 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 10,929 barrels a month, about 1,366 per wellbore. Its strongest month on the record we hold was November 2018, at 119,051 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 THE SPHINX
- Who operates THE SPHINX?
- THE SPHINX is operated by Cog Operating LLC, Railroad Commission of Texas operator number 166150.
- Where is THE SPHINX?
- THE SPHINX is a Texas oil lease in Reeves County, Texas, in Railroad Commission district 08. Its Railroad Commission lease number is 49497.
- Is THE SPHINX still producing?
- THE SPHINX is currently producing. The most recent month of production reported to the Railroad Commission of Texas for THE SPHINX is August 2026.
- How much has THE SPHINX produced?
- THE SPHINX has reported 3,417,514 barrels of oil (bbl) to the Railroad Commission of Texas between November 2017 and August 2026, from 8 wellbores.
- How much is THE SPHINX worth?
- The remaining production from THE SPHINX is estimated to be worth about $33.8M in total as of 26 August 2026, within a range of $27.7M to $39.9M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in THE SPHINX is a fraction of it. The estimate fits an Arps decline curve to the production THE SPHINX has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for THE SPHINX is an estimate of value, not an offer and not an appraisal.
- How much income does THE SPHINX generate in a year?
- THE SPHINX is forecast to net about $9.0M across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in THE SPHINX receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Cog Operating LLC |
|---|---|
| Field | Wolfbone (Trend Area) |
| County | Reeves County, Texas |
| RRC district | 08 |
| Lease number | 49497 |
| Wellbores | 8 |
| Reported production | 3,417,514 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $33.8M |
Where THE SPHINX 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.