HIERHOLZER SEEWALD UNIT
HIERHOLZER SEEWALD UNIT is a Texas oil lease in Atascosa County, Railroad Commission district 01, operated by Marathon Oil Ef LLC. It has 1 wellbore on file with the Commission. Reported production runs from May 2011 to August 2026, totalling 190,021 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 $547K, with roughly $104K 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 91 barrels a month. Its strongest month on the record we hold was December 2024, at 2,965 barrels. In our own backtest, leases producing at this rate are forecast to within about 45% 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 HIERHOLZER SEEWALD UNIT
- Who operates HIERHOLZER SEEWALD UNIT?
- HIERHOLZER SEEWALD UNIT is operated by Marathon Oil Ef LLC, Railroad Commission of Texas operator number 525398.
- Where is HIERHOLZER SEEWALD UNIT?
- HIERHOLZER SEEWALD UNIT is a Texas oil lease in Atascosa County, Texas, in Railroad Commission district 01. Its Railroad Commission lease number is 15599.
- Is HIERHOLZER SEEWALD UNIT still producing?
- HIERHOLZER SEEWALD UNIT is currently producing. The most recent month of production reported to the Railroad Commission of Texas for HIERHOLZER SEEWALD UNIT is August 2026.
- How much has HIERHOLZER SEEWALD UNIT produced?
- HIERHOLZER SEEWALD UNIT has reported 190,021 barrels of oil (bbl) to the Railroad Commission of Texas between May 2011 and August 2026, from 1 wellbore.
- How much is HIERHOLZER SEEWALD UNIT worth?
- The remaining production from HIERHOLZER SEEWALD UNIT is estimated to be worth about $547K in total as of 27 August 2026, within a range of $301K to $793K. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in HIERHOLZER SEEWALD UNIT is a fraction of it. The estimate fits an Arps decline curve to the production HIERHOLZER SEEWALD UNIT has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for HIERHOLZER SEEWALD UNIT is an estimate of value, not an offer and not an appraisal.
- How much income does HIERHOLZER SEEWALD UNIT generate in a year?
- HIERHOLZER SEEWALD UNIT is forecast to net about $104K across the whole undivided lease over the twelve months following 27 August 2026, before income tax. A royalty owner in HIERHOLZER SEEWALD UNIT 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 | 15599 |
| Wellbores | 1 |
| Reported production | 190,021 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $547K |
Where HIERHOLZER SEEWALD UNIT 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.