RIO SAN MARCOS 36-45 UNIT 1A
RIO SAN MARCOS 36-45 UNIT 1A is a Texas oil lease in Midland County, Railroad Commission district 08, operated by Endeavor Energy Resources L.P. It has 5 wellbores on file with the Commission. Reported production runs from February 2020 to August 2026, totalling 1,256,432 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 $16.3M, with roughly $4.5M 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 6,104 barrels a month, about 1,221 per wellbore. Its strongest month on the record we hold was April 2020, at 51,827 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 RIO SAN MARCOS 36-45 UNIT 1A
- Who operates RIO SAN MARCOS 36-45 UNIT 1A?
- RIO SAN MARCOS 36-45 UNIT 1A is operated by Endeavor Energy Resources L.P., Railroad Commission of Texas operator number 251726.
- Where is RIO SAN MARCOS 36-45 UNIT 1A?
- RIO SAN MARCOS 36-45 UNIT 1A is a Texas oil lease in Midland County, Texas, in Railroad Commission district 08. Its Railroad Commission lease number is 53693.
- Is RIO SAN MARCOS 36-45 UNIT 1A still producing?
- RIO SAN MARCOS 36-45 UNIT 1A is currently producing. The most recent month of production reported to the Railroad Commission of Texas for RIO SAN MARCOS 36-45 UNIT 1A is August 2026.
- How much has RIO SAN MARCOS 36-45 UNIT 1A produced?
- RIO SAN MARCOS 36-45 UNIT 1A has reported 1,256,432 barrels of oil (bbl) to the Railroad Commission of Texas between February 2020 and August 2026, from 5 wellbores.
- How much is RIO SAN MARCOS 36-45 UNIT 1A worth?
- The remaining production from RIO SAN MARCOS 36-45 UNIT 1A is estimated to be worth about $16.3M in total as of 27 August 2026, within a range of $13.5M to $19.0M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in RIO SAN MARCOS 36-45 UNIT 1A is a fraction of it. The estimate fits an Arps decline curve to the production RIO SAN MARCOS 36-45 UNIT 1A has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for RIO SAN MARCOS 36-45 UNIT 1A is an estimate of value, not an offer and not an appraisal.
- How much income does RIO SAN MARCOS 36-45 UNIT 1A generate in a year?
- RIO SAN MARCOS 36-45 UNIT 1A is forecast to net about $4.5M across the whole undivided lease over the twelve months following 27 August 2026, before income tax. A royalty owner in RIO SAN MARCOS 36-45 UNIT 1A 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) R 40 Exc |
| County | Midland County, Texas |
| RRC district | 08 |
| Lease number | 53693 |
| Wellbores | 5 |
| Reported production | 1,256,432 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $16.3M |
Where RIO SAN MARCOS 36-45 UNIT 1A 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.