MAY-CHAPMAN
MAY-CHAPMAN is a Texas oil lease in Atascosa County, Railroad Commission district 01, operated by Marathon Oil Ef LLC. It has 9 wellbores on file with the Commission. Reported production runs from June 2012 to August 2026, totalling 2,115,760 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 $6.5M, with roughly $1.7M 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 2,671 barrels a month, about 297 per wellbore. Its strongest month on the record we hold was March 2018, at 131,294 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 MAY-CHAPMAN
- Who operates MAY-CHAPMAN?
- MAY-CHAPMAN is operated by Marathon Oil Ef LLC, Railroad Commission of Texas operator number 525398.
- Where is MAY-CHAPMAN?
- MAY-CHAPMAN is a Texas oil lease in Atascosa County, Texas, in Railroad Commission district 01. Its Railroad Commission lease number is 16009.
- Is MAY-CHAPMAN still producing?
- MAY-CHAPMAN is currently producing. The most recent month of production reported to the Railroad Commission of Texas for MAY-CHAPMAN is August 2026.
- How much has MAY-CHAPMAN produced?
- MAY-CHAPMAN has reported 2,115,760 barrels of oil (bbl) to the Railroad Commission of Texas between June 2012 and August 2026, from 9 wellbores.
- How much is MAY-CHAPMAN worth?
- The remaining production from MAY-CHAPMAN is estimated to be worth about $6.5M in total as of 27 August 2026, within a range of $5.4M to $7.6M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in MAY-CHAPMAN is a fraction of it. The estimate fits an Arps decline curve to the production MAY-CHAPMAN has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for MAY-CHAPMAN is an estimate of value, not an offer and not an appraisal.
- How much income does MAY-CHAPMAN generate in a year?
- MAY-CHAPMAN is forecast to net about $1.7M across the whole undivided lease over the twelve months following 27 August 2026, before income tax. A royalty owner in MAY-CHAPMAN 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 | 16009 |
| Wellbores | 9 |
| Reported production | 2,115,760 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $6.5M |
Where MAY-CHAPMAN 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.