Y BAR EF
Y BAR EF is a Texas oil lease in Mcmullen County, Railroad Commission district 01, operated by Swift Energy Operating, LLC. It has 5 wellbores on file with the Commission. Reported production runs from January 2011 to August 2026, totalling 408,170 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 $636K, with roughly $235K 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 347 barrels a month, about 69 per wellbore. Its strongest month on the record we hold was May 2016, at 2,267 barrels. In our own backtest, leases producing at this rate are forecast to within about 22% 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 Y BAR EF
- Who operates Y BAR EF?
- Y BAR EF is operated by Swift Energy Operating, LLC, Railroad Commission of Texas operator number 833348.
- Where is Y BAR EF?
- Y BAR EF is a Texas oil lease in Mcmullen County, Texas, in Railroad Commission district 01. Its Railroad Commission lease number is 15440.
- Is Y BAR EF still producing?
- Y BAR EF is currently producing. The most recent month of production reported to the Railroad Commission of Texas for Y BAR EF is August 2026.
- How much has Y BAR EF produced?
- Y BAR EF has reported 408,170 barrels of oil (bbl) to the Railroad Commission of Texas between January 2011 and August 2026, from 5 wellbores.
- How much is Y BAR EF worth?
- The remaining production from Y BAR EF is estimated to be worth about $636K in total as of 27 August 2026, within a range of $496K to $775K. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in Y BAR EF is a fraction of it. The estimate fits an Arps decline curve to the production Y BAR EF has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for Y BAR EF is an estimate of value, not an offer and not an appraisal.
- How much income does Y BAR EF generate in a year?
- Y BAR EF is forecast to net about $235K across the whole undivided lease over the twelve months following 27 August 2026, before income tax. A royalty owner in Y BAR EF receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Swift Energy Operating, LLC |
|---|---|
| Field | Eagleville (Eagle Ford-1) |
| County | Mcmullen County, Texas |
| RRC district | 01 |
| Lease number | 15440 |
| Wellbores | 5 |
| Reported production | 408,170 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $636K |
Where Y BAR 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.