AMACKER 66F
AMACKER 66F is a Texas oil lease in Upton County, Railroad Commission district 7C, operated by Cog Operating LLC. It has 1 wellbore on file with the Commission. Reported production runs from June 2019 to August 2026, totalling 450,021 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 $5.2M, with roughly $1.3M 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 1,354 barrels a month. Its strongest month on the record we hold was February 2020, at 40,582 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 AMACKER 66F
- Who operates AMACKER 66F?
- AMACKER 66F is operated by Cog Operating LLC, Railroad Commission of Texas operator number 166150.
- Where is AMACKER 66F?
- AMACKER 66F is a Texas oil lease in Upton County, Texas, in Railroad Commission district 7C. Its Railroad Commission lease number is 20848.
- Is AMACKER 66F still producing?
- AMACKER 66F is currently producing. The most recent month of production reported to the Railroad Commission of Texas for AMACKER 66F is August 2026.
- How much has AMACKER 66F produced?
- AMACKER 66F has reported 450,021 barrels of oil (bbl) to the Railroad Commission of Texas between June 2019 and August 2026, from 1 wellbore.
- How much is AMACKER 66F worth?
- The remaining production from AMACKER 66F is estimated to be worth about $5.2M in total as of 26 August 2026, within a range of $4.4M to $6.1M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in AMACKER 66F is a fraction of it. The estimate fits an Arps decline curve to the production AMACKER 66F has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for AMACKER 66F is an estimate of value, not an offer and not an appraisal.
- How much income does AMACKER 66F generate in a year?
- AMACKER 66F is forecast to net about $1.3M across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in AMACKER 66F receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Cog Operating LLC |
|---|---|
| Field | Spraberry (Trend Area) |
| County | Upton County, Texas |
| RRC district | 7C |
| Lease number | 20848 |
| Wellbores | 1 |
| Reported production | 450,021 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $5.2M |
Where AMACKER 66F 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.