BROOK D-SW4B
BROOK D-SW4B is a Texas oil lease in Upton County, Railroad Commission district 7C, operated by Pioneer Natural Res. USA, Inc. It has 1 wellbore on file with the Commission. Reported production runs from August 2022 to August 2026, totalling 188,610 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 $4.1M, with roughly $1.2M 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 2,483 barrels a month. Its strongest month on the record we hold was January 2023, at 17,071 barrels. In our own backtest, leases producing at this rate are forecast to within about 17% 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 BROOK D-SW4B
- Who operates BROOK D-SW4B?
- BROOK D-SW4B is operated by Pioneer Natural Res. USA, Inc., Railroad Commission of Texas operator number 665748.
- Where is BROOK D-SW4B?
- BROOK D-SW4B is a Texas oil lease in Upton County, Texas, in Railroad Commission district 7C. Its Railroad Commission lease number is 21923.
- Is BROOK D-SW4B still producing?
- BROOK D-SW4B is currently producing. The most recent month of production reported to the Railroad Commission of Texas for BROOK D-SW4B is August 2026.
- How much has BROOK D-SW4B produced?
- BROOK D-SW4B has reported 188,610 barrels of oil (bbl) to the Railroad Commission of Texas between August 2022 and August 2026, from 1 wellbore.
- How much is BROOK D-SW4B worth?
- The remaining production from BROOK D-SW4B is estimated to be worth about $4.1M in total as of 27 August 2026, within a range of $3.4M to $4.8M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in BROOK D-SW4B is a fraction of it. The estimate fits an Arps decline curve to the production BROOK D-SW4B has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for BROOK D-SW4B is an estimate of value, not an offer and not an appraisal.
- How much income does BROOK D-SW4B generate in a year?
- BROOK D-SW4B is forecast to net about $1.2M across the whole undivided lease over the twelve months following 27 August 2026, before income tax. A royalty owner in BROOK D-SW4B receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Pioneer Natural Res. USA, Inc. |
|---|---|
| Field | Spraberry (Trend Area) |
| County | Upton County, Texas |
| RRC district | 7C |
| Lease number | 21923 |
| Wellbores | 1 |
| Reported production | 188,610 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $4.1M |
Where BROOK D-SW4B 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.