HIERHOLZER-CHAPMAN SA
HIERHOLZER-CHAPMAN SA 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 August 2023 to August 2026, totalling 310,691 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 $11.7M, with roughly $3.9M 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 7,358 barrels a month. Its strongest month on the record we hold was March 2024, at 26,458 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 HIERHOLZER-CHAPMAN SA
- Who operates HIERHOLZER-CHAPMAN SA?
- HIERHOLZER-CHAPMAN SA is operated by Marathon Oil Ef LLC, Railroad Commission of Texas operator number 525398.
- Where is HIERHOLZER-CHAPMAN SA?
- HIERHOLZER-CHAPMAN SA is a Texas oil lease in Atascosa County, Texas, in Railroad Commission district 01. Its Railroad Commission lease number is 21193.
- Is HIERHOLZER-CHAPMAN SA still producing?
- HIERHOLZER-CHAPMAN SA is currently producing. The most recent month of production reported to the Railroad Commission of Texas for HIERHOLZER-CHAPMAN SA is August 2026.
- How much has HIERHOLZER-CHAPMAN SA produced?
- HIERHOLZER-CHAPMAN SA has reported 310,691 barrels of oil (bbl) to the Railroad Commission of Texas between August 2023 and August 2026, from 1 wellbore.
- How much is HIERHOLZER-CHAPMAN SA worth?
- The remaining production from HIERHOLZER-CHAPMAN SA is estimated to be worth about $11.7M in total as of 27 August 2026, within a range of $9.7M to $13.7M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in HIERHOLZER-CHAPMAN SA is a fraction of it. The estimate fits an Arps decline curve to the production HIERHOLZER-CHAPMAN SA has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for HIERHOLZER-CHAPMAN SA is an estimate of value, not an offer and not an appraisal.
- How much income does HIERHOLZER-CHAPMAN SA generate in a year?
- HIERHOLZER-CHAPMAN SA is forecast to net about $3.9M across the whole undivided lease over the twelve months following 27 August 2026, before income tax. A royalty owner in HIERHOLZER-CHAPMAN SA 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 | 21193 |
| Wellbores | 1 |
| Reported production | 310,691 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $11.7M |
Where HIERHOLZER-CHAPMAN SA 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.