AMMANN
AMMANN is a Texas oil lease in Dimmit County, Railroad Commission district 01, operated by Endeavor Natural Gas, LP. It has 7 wellbores on file with the Commission. Reported production runs from July 2022 to August 2026, totalling 556,446 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 $43.2M, with roughly $9.4M 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 13,648 barrels a month, about 1,950 per wellbore. Its strongest month on the record we hold was July 2023, at 32,290 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 AMMANN
- Who operates AMMANN?
- AMMANN is operated by Endeavor Natural Gas, LP, Railroad Commission of Texas operator number 251729.
- Where is AMMANN?
- AMMANN is a Texas oil lease in Dimmit County, Texas, in Railroad Commission district 01. Its Railroad Commission lease number is 20667.
- Is AMMANN still producing?
- AMMANN is currently producing. The most recent month of production reported to the Railroad Commission of Texas for AMMANN is August 2026.
- How much has AMMANN produced?
- AMMANN has reported 556,446 barrels of oil (bbl) to the Railroad Commission of Texas between July 2022 and August 2026, from 7 wellbores.
- How much is AMMANN worth?
- The remaining production from AMMANN is estimated to be worth about $43.2M in total as of 26 August 2026, within a range of $35.4M to $51.0M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in AMMANN is a fraction of it. The estimate fits an Arps decline curve to the production AMMANN has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for AMMANN is an estimate of value, not an offer and not an appraisal.
- How much income does AMMANN generate in a year?
- AMMANN is forecast to net about $9.4M across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in AMMANN receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Endeavor Natural Gas, LP |
|---|---|
| Field | Hugh Fitzsimmons (San Miguel) |
| County | Dimmit County, Texas |
| RRC district | 01 |
| Lease number | 20667 |
| Wellbores | 7 |
| Reported production | 556,446 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $43.2M |
Where AMMANN 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.