SONJA
SONJA is a Texas oil lease in Midland County, Railroad Commission district 08, operated by Rki Exploration & Production LLC. It has 10 wellbores on file with the Commission. Reported production runs from March 2010 to August 2026, totalling 346,491 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 $1.9M, with roughly $447K 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 582 barrels a month, about 58 per wellbore. Its strongest month on the record we hold was January 2021, at 2,410 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 SONJA
- Who operates SONJA?
- SONJA is operated by Rki Exploration & Production LLC, Railroad Commission of Texas operator number 714221.
- Where is SONJA?
- SONJA is a Texas oil lease in Midland County, Texas, in Railroad Commission district 08. Its Railroad Commission lease number is 42007.
- Is SONJA still producing?
- SONJA is currently producing. The most recent month of production reported to the Railroad Commission of Texas for SONJA is August 2026.
- How much has SONJA produced?
- SONJA has reported 346,491 barrels of oil (bbl) to the Railroad Commission of Texas between March 2010 and August 2026, from 10 wellbores.
- How much is SONJA worth?
- The remaining production from SONJA is estimated to be worth about $1.9M in total as of 26 August 2026, within a range of $1.5M to $2.4M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in SONJA is a fraction of it. The estimate fits an Arps decline curve to the production SONJA has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for SONJA is an estimate of value, not an offer and not an appraisal.
- How much income does SONJA generate in a year?
- SONJA is forecast to net about $447K across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in SONJA receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Rki Exploration & Production LLC |
|---|---|
| Field | Red Bluff (Brushy Canyon) |
| County | Midland County, Texas |
| RRC district | 08 |
| Lease number | 42007 |
| Wellbores | 10 |
| Reported production | 346,491 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $1.9M |
Where SONJA 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.