ARMSTRONG "12"
ARMSTRONG "12" is a Texas oil lease in Martin County, Railroad Commission district 08, operated by Petroplex Energy Inc. It has 2 wellbores on file with the Commission. Reported production runs from May 2009 to August 2026, totalling 281,439 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 $1.3M, with roughly $336K 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 473 barrels a month, about 236 per wellbore. Its strongest month on the record we hold was September 2020, at 2,949 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 ARMSTRONG "12"
- Who operates ARMSTRONG "12"?
- ARMSTRONG "12" is operated by Petroplex Energy Inc., Railroad Commission of Texas operator number 660886.
- Where is ARMSTRONG "12"?
- ARMSTRONG "12" is a Texas oil lease in Martin County, Texas, in Railroad Commission district 08. Its Railroad Commission lease number is 39527.
- Is ARMSTRONG "12" still producing?
- ARMSTRONG "12" is currently producing. The most recent month of production reported to the Railroad Commission of Texas for ARMSTRONG "12" is August 2026.
- How much has ARMSTRONG "12" produced?
- ARMSTRONG "12" has reported 281,439 barrels of oil (bbl) to the Railroad Commission of Texas between May 2009 and August 2026, from 2 wellbores.
- How much is ARMSTRONG "12" worth?
- The remaining production from ARMSTRONG "12" is estimated to be worth about $1.3M in total as of 27 August 2026, within a range of $984K to $1.5M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in ARMSTRONG "12" is a fraction of it. The estimate fits an Arps decline curve to the production ARMSTRONG "12" has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for ARMSTRONG "12" is an estimate of value, not an offer and not an appraisal.
- How much income does ARMSTRONG "12" generate in a year?
- ARMSTRONG "12" is forecast to net about $336K across the whole undivided lease over the twelve months following 27 August 2026, before income tax. A royalty owner in ARMSTRONG "12" receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Petroplex Energy Inc. |
|---|---|
| Field | Spraberry (Trend Area) |
| County | Martin County, Texas |
| RRC district | 08 |
| Lease number | 39527 |
| Wellbores | 2 |
| Reported production | 281,439 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $1.3M |
Where ARMSTRONG "12" 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.