MURPHY-SINCLAIR UNIT
MURPHY-SINCLAIR UNIT is a Texas oil lease in Karnes County, Railroad Commission district 02, operated by Marathon Oil Ef LLC. It has 5 wellbores on file with the Commission. Reported production runs from May 2015 to August 2026, totalling 258,168 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 $859K, with roughly $180K 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 366 barrels a month, about 73 per wellbore. Its strongest month on the record we hold was May 2016, at 5,741 barrels. In our own backtest, leases producing at this rate are forecast to within about 22% 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 MURPHY-SINCLAIR UNIT
- Who operates MURPHY-SINCLAIR UNIT?
- MURPHY-SINCLAIR UNIT is operated by Marathon Oil Ef LLC, Railroad Commission of Texas operator number 525398.
- Where is MURPHY-SINCLAIR UNIT?
- MURPHY-SINCLAIR UNIT is a Texas oil lease in Karnes County, Texas, in Railroad Commission district 02. Its Railroad Commission lease number is 11140.
- Is MURPHY-SINCLAIR UNIT still producing?
- MURPHY-SINCLAIR UNIT is currently producing. The most recent month of production reported to the Railroad Commission of Texas for MURPHY-SINCLAIR UNIT is August 2026.
- How much has MURPHY-SINCLAIR UNIT produced?
- MURPHY-SINCLAIR UNIT has reported 258,168 barrels of oil (bbl) to the Railroad Commission of Texas between May 2015 and August 2026, from 5 wellbores.
- How much is MURPHY-SINCLAIR UNIT worth?
- The remaining production from MURPHY-SINCLAIR UNIT is estimated to be worth about $859K in total as of 26 August 2026, within a range of $670K to $1.0M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in MURPHY-SINCLAIR UNIT is a fraction of it. The estimate fits an Arps decline curve to the production MURPHY-SINCLAIR UNIT has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for MURPHY-SINCLAIR UNIT is an estimate of value, not an offer and not an appraisal.
- How much income does MURPHY-SINCLAIR UNIT generate in a year?
- MURPHY-SINCLAIR UNIT is forecast to net about $180K across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in MURPHY-SINCLAIR UNIT 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 | 11140 |
| Wellbores | 5 |
| Reported production | 258,168 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $859K |
Where MURPHY-SINCLAIR 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.