GILLILAND
GILLILAND is a Texas oil lease in Atascosa County, Railroad Commission district 01, operated by Calk, J. M. Operating Co. It has 10 wellbores on file with the Commission. Reported production runs from January 1993 to August 2026, totalling 20,181 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 $78K, with roughly $15K 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 28 barrels a month, about 3 per wellbore. Its strongest month on the record we hold was October 2024, at 69 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 GILLILAND
- Who operates GILLILAND?
- GILLILAND is operated by Calk, J. M. Operating Co., Railroad Commission of Texas operator number 123874.
- Where is GILLILAND?
- GILLILAND is a Texas oil lease in Atascosa County, Texas, in Railroad Commission district 01. Its Railroad Commission lease number is 10734.
- Is GILLILAND still producing?
- GILLILAND is currently producing. The most recent month of production reported to the Railroad Commission of Texas for GILLILAND is August 2026.
- How much has GILLILAND produced?
- GILLILAND has reported 20,181 barrels of oil (bbl) to the Railroad Commission of Texas between January 1993 and August 2026, from 10 wellbores.
- How much is GILLILAND worth?
- The remaining production from GILLILAND is estimated to be worth about $78K in total as of 27 August 2026, within a range of $43K to $114K. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in GILLILAND is a fraction of it. The estimate fits an Arps decline curve to the production GILLILAND has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for GILLILAND is an estimate of value, not an offer and not an appraisal.
- How much income does GILLILAND generate in a year?
- GILLILAND is forecast to net about $15K across the whole undivided lease over the twelve months following 27 August 2026, before income tax. A royalty owner in GILLILAND receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Calk, J. M. Operating Co. |
|---|---|
| Field | Somerset |
| County | Atascosa County, Texas |
| RRC district | 01 |
| Lease number | 10734 |
| Wellbores | 10 |
| Reported production | 20,181 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $78K |
Where GILLILAND 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.