GUAJILLO EAST
GUAJILLO EAST is a Texas oil lease in Atascosa County, Railroad Commission district 01, operated by Marathon Oil Ef LLC. It has 61 wellbores on file with the Commission. Reported production runs from March 2014 to August 2026, totalling 10,911,952 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 $13.5M, with roughly $7.5M 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 16,041 barrels a month, about 263 per wellbore. Its strongest month on the record we hold was February 2019, at 229,489 barrels. 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 GUAJILLO EAST
- Who operates GUAJILLO EAST?
- GUAJILLO EAST is operated by Marathon Oil Ef LLC, Railroad Commission of Texas operator number 525398.
- Where is GUAJILLO EAST?
- GUAJILLO EAST is a Texas oil lease in Atascosa County, Texas, in Railroad Commission district 01. Its Railroad Commission lease number is 17741.
- Is GUAJILLO EAST still producing?
- GUAJILLO EAST is currently producing. The most recent month of production reported to the Railroad Commission of Texas for GUAJILLO EAST is August 2026.
- How much has GUAJILLO EAST produced?
- GUAJILLO EAST has reported 10,911,952 barrels of oil (bbl) to the Railroad Commission of Texas between March 2014 and August 2026, from 61 wellbores.
- How much is GUAJILLO EAST worth?
- The remaining production from GUAJILLO EAST is estimated to be worth about $13.5M in total as of 26 August 2026, within a range of $11.1M to $15.9M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in GUAJILLO EAST is a fraction of it. The estimate fits an Arps decline curve to the production GUAJILLO EAST has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for GUAJILLO EAST is an estimate of value, not an offer and not an appraisal.
- How much income does GUAJILLO EAST generate in a year?
- GUAJILLO EAST is forecast to net about $7.5M across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in GUAJILLO EAST 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 | 17741 |
| Wellbores | 61 |
| Reported production | 10,911,952 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $13.5M |
Where GUAJILLO EAST 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.