MARY 18
MARY 18 is a Texas oil lease in Upton County, Railroad Commission district 7C, operated by Parsley Energy Operations, LLC. It has 8 wellbores on file with the Commission. Reported production runs from November 2013 to August 2026, totalling 935,003 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 $707K, with roughly $342K 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 519 barrels a month, about 65 per wellbore. Its strongest month on the record we hold was May 2017, at 19,709 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 MARY 18
- Who operates MARY 18?
- MARY 18 is operated by Parsley Energy Operations, LLC, Railroad Commission of Texas operator number 642652.
- Where is MARY 18?
- MARY 18 is a Texas oil lease in Upton County, Texas, in Railroad Commission district 7C. Its Railroad Commission lease number is 18593.
- Is MARY 18 still producing?
- MARY 18 is currently producing. The most recent month of production reported to the Railroad Commission of Texas for MARY 18 is August 2026.
- How much has MARY 18 produced?
- MARY 18 has reported 935,003 barrels of oil (bbl) to the Railroad Commission of Texas between November 2013 and August 2026, from 8 wellbores.
- How much is MARY 18 worth?
- The remaining production from MARY 18 is estimated to be worth about $707K in total as of 27 August 2026, within a range of $551K to $862K. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in MARY 18 is a fraction of it. The estimate fits an Arps decline curve to the production MARY 18 has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for MARY 18 is an estimate of value, not an offer and not an appraisal.
- How much income does MARY 18 generate in a year?
- MARY 18 is forecast to net about $342K across the whole undivided lease over the twelve months following 27 August 2026, before income tax. A royalty owner in MARY 18 receives a fraction of that, set by the decimal interest printed on their check stub.
Lease record
| Operator | Parsley Energy Operations, LLC |
|---|---|
| Field | Spraberry (Trend Area) R 40 Exc |
| County | Upton County, Texas |
| RRC district | 7C |
| Lease number | 18593 |
| Wellbores | 8 |
| Reported production | 935,003 bbl |
| First reported | |
| Last reported | |
| Estimated royalty value | $707K |
Where MARY 18 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.