SAU 40-4
SAU 40-4 is a Texas oil lease in Reagan County, Railroad Commission district 7C, operated by Mariner Energy, Inc. It has 4 wellbores on file with the Commission. Reported production runs from May 2008 to August 2026, totalling 76,703 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 $223K, with roughly $38K 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 57 barrels a month, about 14 per wellbore. Its strongest month on the record we hold was June 2016, at 420 barrels. In our own backtest, leases producing at this rate are forecast to within about 45% 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 SAU 40-4
- Who operates SAU 40-4?
- SAU 40-4 is operated by Mariner Energy, Inc., Railroad Commission of Texas operator number 526155.
- Where is SAU 40-4?
- SAU 40-4 is a Texas oil lease in Reagan County, Texas, in Railroad Commission district 7C. Its Railroad Commission lease number is 16632.
- Is SAU 40-4 still producing?
- SAU 40-4 is currently producing. The most recent month of production reported to the Railroad Commission of Texas for SAU 40-4 is August 2026.
- How much has SAU 40-4 produced?
- SAU 40-4 has reported 76,703 barrels of oil (bbl) to the Railroad Commission of Texas between May 2008 and August 2026, from 4 wellbores.
- How much is SAU 40-4 worth?
- The remaining production from SAU 40-4 is estimated to be worth about $223K in total as of 27 August 2026, within a range of $123K to $323K. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in SAU 40-4 is a fraction of it. The estimate fits an Arps decline curve to the production SAU 40-4 has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for SAU 40-4 is an estimate of value, not an offer and not an appraisal.
- How much income does SAU 40-4 generate in a year?
- SAU 40-4 is forecast to net about $38K across the whole undivided lease over the twelve months following 27 August 2026, before income tax. A royalty owner in SAU 40-4 receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Mariner Energy, Inc. |
|---|---|
| Field | Spraberry (Trend Area) |
| County | Reagan County, Texas |
| RRC district | 7C |
| Lease number | 16632 |
| Wellbores | 4 |
| Reported production | 76,703 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $223K |
Where SAU 40-4 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.