NBR EF
NBR EF is a Texas oil lease in Mcmullen County, Railroad Commission district 01, operated by Silverbow Resources Oper, LLC. It has 3 wellbores on file with the Commission. Reported production runs from January 2020 to August 2026, totalling 417,403 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 $3.3M, with roughly $866K 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 1,235 barrels a month, about 412 per wellbore. Its strongest month on the record we hold was February 2020, at 37,782 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 NBR EF
- Who operates NBR EF?
- NBR EF is operated by Silverbow Resources Oper, LLC, Railroad Commission of Texas operator number 781915.
- Where is NBR EF?
- NBR EF is a Texas oil lease in Mcmullen County, Texas, in Railroad Commission district 01. Its Railroad Commission lease number is 20231.
- Is NBR EF still producing?
- NBR EF is currently producing. The most recent month of production reported to the Railroad Commission of Texas for NBR EF is August 2026.
- How much has NBR EF produced?
- NBR EF has reported 417,403 barrels of oil (bbl) to the Railroad Commission of Texas between January 2020 and August 2026, from 3 wellbores.
- How much is NBR EF worth?
- The remaining production from NBR EF is estimated to be worth about $3.3M in total as of 26 August 2026, within a range of $2.8M to $3.9M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in NBR EF is a fraction of it. The estimate fits an Arps decline curve to the production NBR EF has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for NBR EF is an estimate of value, not an offer and not an appraisal.
- How much income does NBR EF generate in a year?
- NBR EF is forecast to net about $866K across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in NBR EF receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Silverbow Resources Oper, LLC |
|---|---|
| Field | Eagleville (Eagle Ford-1) |
| County | Mcmullen County, Texas |
| RRC district | 01 |
| Lease number | 20231 |
| Wellbores | 3 |
| Reported production | 417,403 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $3.3M |
Where NBR EF 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.