GRANTHAM 12
GRANTHAM 12 is a Texas oil lease in Howard County, Railroad Commission district 08, operated by Cobra Oil & Gas Corporation. It has 5 wellbores on file with the Commission. Reported production runs from January 2011 to August 2026, totalling 253,384 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 $1.3M, with roughly $221K 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 229 barrels a month, about 46 per wellbore. Its strongest month on the record we hold was April 2017, at 3,400 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 GRANTHAM 12
- Who operates GRANTHAM 12?
- GRANTHAM 12 is operated by Cobra Oil & Gas Corporation, Railroad Commission of Texas operator number 163000.
- Where is GRANTHAM 12?
- GRANTHAM 12 is a Texas oil lease in Howard County, Texas, in Railroad Commission district 08. Its Railroad Commission lease number is 40744.
- Is GRANTHAM 12 still producing?
- GRANTHAM 12 is currently producing. The most recent month of production reported to the Railroad Commission of Texas for GRANTHAM 12 is August 2026.
- How much has GRANTHAM 12 produced?
- GRANTHAM 12 has reported 253,384 barrels of oil (bbl) to the Railroad Commission of Texas between January 2011 and August 2026, from 5 wellbores.
- How much is GRANTHAM 12 worth?
- The remaining production from GRANTHAM 12 is estimated to be worth about $1.3M in total as of 26 August 2026, within a range of $1.0M to $1.6M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in GRANTHAM 12 is a fraction of it. The estimate fits an Arps decline curve to the production GRANTHAM 12 has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for GRANTHAM 12 is an estimate of value, not an offer and not an appraisal.
- How much income does GRANTHAM 12 generate in a year?
- GRANTHAM 12 is forecast to net about $221K across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in GRANTHAM 12 receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Cobra Oil & Gas Corporation |
|---|---|
| Field | Spraberry (Trend Area) |
| County | Howard County, Texas |
| RRC district | 08 |
| Lease number | 40744 |
| Wellbores | 5 |
| Reported production | 253,384 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $1.3M |
Where GRANTHAM 12 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.