HALL-MANNING
HALL-MANNING is a Texas oil lease in Gonzales County, Railroad Commission district 01, operated by Marathon Oil Ef LLC. It has 4 wellbores on file with the Commission. Reported production runs from August 2014 to August 2026, totalling 563,811 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 $1.2M, with roughly $658K 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 1,198 barrels a month, about 299 per wellbore. Its strongest month on the record we hold was April 2022, at 37,230 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 HALL-MANNING
- Who operates HALL-MANNING?
- HALL-MANNING is operated by Marathon Oil Ef LLC, Railroad Commission of Texas operator number 525398.
- Where is HALL-MANNING?
- HALL-MANNING is a Texas oil lease in Gonzales County, Texas, in Railroad Commission district 01. Its Railroad Commission lease number is 18030.
- Is HALL-MANNING still producing?
- HALL-MANNING is currently producing. The most recent month of production reported to the Railroad Commission of Texas for HALL-MANNING is August 2026.
- How much has HALL-MANNING produced?
- HALL-MANNING has reported 563,811 barrels of oil (bbl) to the Railroad Commission of Texas between August 2014 and August 2026, from 4 wellbores.
- How much is HALL-MANNING worth?
- The remaining production from HALL-MANNING is estimated to be worth about $1.2M in total as of 26 August 2026, within a range of $963K to $1.4M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in HALL-MANNING is a fraction of it. The estimate fits an Arps decline curve to the production HALL-MANNING has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for HALL-MANNING is an estimate of value, not an offer and not an appraisal.
- How much income does HALL-MANNING generate in a year?
- HALL-MANNING is forecast to net about $658K across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in HALL-MANNING 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 | Gonzales County, Texas |
| RRC district | 01 |
| Lease number | 18030 |
| Wellbores | 4 |
| Reported production | 563,811 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $1.2M |
Where HALL-MANNING 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.