R. MAY B
R. MAY B is a Texas oil lease in Atascosa County, Railroad Commission district 01, operated by Marathon Oil Ef LLC. It has 28 wellbores on file with the Commission. Reported production runs from September 2012 to August 2026, totalling 5,765,817 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 $6.9M, with roughly $3.5M 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 7,329 barrels a month, about 262 per wellbore. Its strongest month on the record we hold was August 2017, at 103,127 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 R. MAY B
- Who operates R. MAY B?
- R. MAY B is operated by Marathon Oil Ef LLC, Railroad Commission of Texas operator number 525398.
- Where is R. MAY B?
- R. MAY B is a Texas oil lease in Atascosa County, Texas, in Railroad Commission district 01. Its Railroad Commission lease number is 16361.
- Is R. MAY B still producing?
- R. MAY B is currently producing. The most recent month of production reported to the Railroad Commission of Texas for R. MAY B is August 2026.
- How much has R. MAY B produced?
- R. MAY B has reported 5,765,817 barrels of oil (bbl) to the Railroad Commission of Texas between September 2012 and August 2026, from 28 wellbores.
- How much is R. MAY B worth?
- The remaining production from R. MAY B is estimated to be worth about $6.9M in total as of 27 August 2026, within a range of $5.8M to $8.1M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in R. MAY B is a fraction of it. The estimate fits an Arps decline curve to the production R. MAY B has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for R. MAY B is an estimate of value, not an offer and not an appraisal.
- How much income does R. MAY B generate in a year?
- R. MAY B is forecast to net about $3.5M across the whole undivided lease over the twelve months following 27 August 2026, before income tax. A royalty owner in R. MAY B receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Marathon Oil Ef LLC |
|---|---|
| Field | Eagleville (Eagle Ford-1) |
| County | Atascosa County, Texas |
| RRC district | 01 |
| Lease number | 16361 |
| Wellbores | 28 |
| Reported production | 5,765,817 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $6.9M |
Where R. MAY B 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.