AMACKER 66A
AMACKER 66A 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 387,818 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 $5.1M, 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 1,356 barrels a month. Its strongest month on the record we hold was February 2020, at 41,602 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 66A
- Who operates AMACKER 66A?
- AMACKER 66A is operated by Cog Operating LLC, Railroad Commission of Texas operator number 166150.
- Where is AMACKER 66A?
- AMACKER 66A is a Texas oil lease in Upton County, Texas, in Railroad Commission district 7C. Its Railroad Commission lease number is 20833.
- Is AMACKER 66A still producing?
- AMACKER 66A is currently producing. The most recent month of production reported to the Railroad Commission of Texas for AMACKER 66A is August 2026.
- How much has AMACKER 66A produced?
- AMACKER 66A has reported 387,818 barrels of oil (bbl) to the Railroad Commission of Texas between June 2019 and August 2026, from 1 wellbore.
- How much is AMACKER 66A worth?
- The remaining production from AMACKER 66A is estimated to be worth about $5.1M in total as of 26 August 2026, within a range of $4.3M to $6.0M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in AMACKER 66A is a fraction of it. The estimate fits an Arps decline curve to the production AMACKER 66A has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for AMACKER 66A is an estimate of value, not an offer and not an appraisal.
- How much income does AMACKER 66A generate in a year?
- AMACKER 66A 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 66A 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 | 20833 |
| Wellbores | 1 |
| Reported production | 387,818 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $5.1M |
Where AMACKER 66A 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.