BLACKJACK UNIT 'A'
BLACKJACK UNIT 'A' is a Texas oil lease in Karnes County, Railroad Commission district 02, operated by Marathon Oil Ef LLC. It has 2 wellbores on file with the Commission. Reported production runs from May 2012 to August 2026, totalling 448,459 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 $1.5M, with roughly $678K 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 1,054 barrels a month, about 527 per wellbore. Its strongest month on the record we hold was November 2025, at 3,841 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 BLACKJACK UNIT 'A'
- Who operates BLACKJACK UNIT 'A'?
- BLACKJACK UNIT 'A' is operated by Marathon Oil Ef LLC, Railroad Commission of Texas operator number 525398.
- Where is BLACKJACK UNIT 'A'?
- BLACKJACK UNIT 'A' is a Texas oil lease in Karnes County, Texas, in Railroad Commission district 02. Its Railroad Commission lease number is 10124.
- Is BLACKJACK UNIT 'A' still producing?
- BLACKJACK UNIT 'A' is currently producing. The most recent month of production reported to the Railroad Commission of Texas for BLACKJACK UNIT 'A' is August 2026.
- How much has BLACKJACK UNIT 'A' produced?
- BLACKJACK UNIT 'A' has reported 448,459 barrels of oil (bbl) to the Railroad Commission of Texas between May 2012 and August 2026, from 2 wellbores.
- How much is BLACKJACK UNIT 'A' worth?
- The remaining production from BLACKJACK UNIT 'A' is estimated to be worth about $1.5M in total as of 26 August 2026, within a range of $1.2M to $1.8M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in BLACKJACK UNIT 'A' is a fraction of it. The estimate fits an Arps decline curve to the production BLACKJACK UNIT 'A' has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for BLACKJACK UNIT 'A' is an estimate of value, not an offer and not an appraisal.
- How much income does BLACKJACK UNIT 'A' generate in a year?
- BLACKJACK UNIT 'A' is forecast to net about $678K across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in BLACKJACK UNIT 'A' receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Marathon Oil Ef LLC |
|---|---|
| Field | Eagleville (Eagle Ford-2) |
| County | Karnes County, Texas |
| RRC district | 02 |
| Lease number | 10124 |
| Wellbores | 2 |
| Reported production | 448,459 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $1.5M |
Where BLACKJACK UNIT 'A' 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.