STS 'D'
STS 'D' is a Texas gas lease in Mcmullen County, Railroad Commission district 01, operated by Sierra Resources, LLC. It has 1 wellbore on file with the Commission. Reported production runs from May 2016 to August 2026, totalling 429,955 thousand cubic feet. The lease is intermittent. 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 $345K, with roughly $76K 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 952 thousand cubic feet a month. Its strongest month on the record we hold was June 2016, at 45,202 thousand cubic feet. 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 STS 'D'
- Who operates STS 'D'?
- STS 'D' is operated by Sierra Resources, LLC, Railroad Commission of Texas operator number 780233.
- Where is STS 'D'?
- STS 'D' is a Texas gas lease in Mcmullen County, Texas, in Railroad Commission district 01. Its Railroad Commission lease number is 281506.
- Is STS 'D' still producing?
- STS 'D' is intermittent. The most recent month of production reported to the Railroad Commission of Texas for STS 'D' is August 2026.
- How much has STS 'D' produced?
- STS 'D' has reported 429,955 thousand cubic feet of gas (Mcf) to the Railroad Commission of Texas between May 2016 and August 2026, from 1 wellbore.
- How much is STS 'D' worth?
- The remaining production from STS 'D' is estimated to be worth about $345K in total as of 26 August 2026, within a range of $269K to $421K. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in STS 'D' is a fraction of it. The estimate fits an Arps decline curve to the production STS 'D' has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for STS 'D' is an estimate of value, not an offer and not an appraisal.
- How much income does STS 'D' generate in a year?
- STS 'D' is forecast to net about $76K across the whole undivided lease over the twelve months following 26 August 2026, before income tax. A royalty owner in STS 'D' receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Sierra Resources, LLC |
|---|---|
| Field | A.W.P. (Olmos) |
| County | Mcmullen County, Texas |
| RRC district | 01 |
| Lease number | 281506 |
| Wellbores | 1 |
| Reported production | 429,955 mcf |
| First reported | |
| Last reported | |
| Estimated royalty value | $345K |
Where STS 'D' 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.