DEMING-LONG SA1
DEMING-LONG SA1 is a Texas gas lease in Karnes County, Railroad Commission district 02, operated by Marathon Oil Ef LLC. It has 1 wellbore on file with the Commission. Reported production runs from September 2024 to August 2026, totalling 2,249,506 thousand cubic feet. 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 $16.5M, with roughly $5.3M 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 82,513 thousand cubic feet a month. Its strongest month on the record we hold was October 2024, at 237,387 thousand cubic feet. In our own backtest, leases producing at this rate are forecast to within about 18% 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 DEMING-LONG SA1
- Who operates DEMING-LONG SA1?
- DEMING-LONG SA1 is operated by Marathon Oil Ef LLC, Railroad Commission of Texas operator number 525398.
- Where is DEMING-LONG SA1?
- DEMING-LONG SA1 is a Texas gas lease in Karnes County, Texas, in Railroad Commission district 02. Its Railroad Commission lease number is 298466.
- Is DEMING-LONG SA1 still producing?
- DEMING-LONG SA1 is currently producing. The most recent month of production reported to the Railroad Commission of Texas for DEMING-LONG SA1 is August 2026.
- How much has DEMING-LONG SA1 produced?
- DEMING-LONG SA1 has reported 2,249,506 thousand cubic feet of gas (Mcf) to the Railroad Commission of Texas between September 2024 and August 2026, from 1 wellbore.
- How much is DEMING-LONG SA1 worth?
- The remaining production from DEMING-LONG SA1 is estimated to be worth about $16.5M in total as of 26 August 2026, within a range of $13.5M to $19.4M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in DEMING-LONG SA1 is a fraction of it. The estimate fits an Arps decline curve to the production DEMING-LONG SA1 has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for DEMING-LONG SA1 is an estimate of value, not an offer and not an appraisal.
- How much income does DEMING-LONG SA1 generate in a year?
- DEMING-LONG SA1 is forecast to net about $5.3M across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in DEMING-LONG SA1 receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Marathon Oil Ef LLC |
|---|---|
| Field | Sugarkane (Eagle Ford) |
| County | Karnes County, Texas |
| RRC district | 02 |
| Lease number | 298466 |
| Wellbores | 1 |
| Reported production | 2,249,506 mcf |
| First reported | |
| Last reported | |
| Estimated royalty value | $16.5M |
Where DEMING-LONG SA1 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.