AMACKER 66E
AMACKER 66E 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 July 2019 to August 2026, totalling 417,851 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 $3.0M, with roughly $1.1M 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 1,286 barrels a month. Its strongest month on the record we hold was February 2020, at 40,137 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 66E
- Who operates AMACKER 66E?
- AMACKER 66E is operated by Cog Operating LLC, Railroad Commission of Texas operator number 166150.
- Where is AMACKER 66E?
- AMACKER 66E is a Texas oil lease in Upton County, Texas, in Railroad Commission district 7C. Its Railroad Commission lease number is 20851.
- Is AMACKER 66E still producing?
- AMACKER 66E is currently producing. The most recent month of production reported to the Railroad Commission of Texas for AMACKER 66E is August 2026.
- How much has AMACKER 66E produced?
- AMACKER 66E has reported 417,851 barrels of oil (bbl) to the Railroad Commission of Texas between July 2019 and August 2026, from 1 wellbore.
- How much is AMACKER 66E worth?
- The remaining production from AMACKER 66E is estimated to be worth about $3.0M in total as of 26 August 2026, within a range of $2.5M to $3.5M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in AMACKER 66E is a fraction of it. The estimate fits an Arps decline curve to the production AMACKER 66E has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for AMACKER 66E is an estimate of value, not an offer and not an appraisal.
- How much income does AMACKER 66E generate in a year?
- AMACKER 66E is forecast to net about $1.1M across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in AMACKER 66E 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 | 20851 |
| Wellbores | 1 |
| Reported production | 417,851 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $3.0M |
Where AMACKER 66E 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.