SWAIN, O. L. 109

SWAIN, O. L. 109 is a Texas oil lease in Van Zandt County, Railroad Commission district 05, operated by Union Oil Company Of California. It has 7 wellbores on file with the Commission. Reported production runs from January 1993 to August 2026, totalling 198,790 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 $1.1M, with roughly $243K 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 366 barrels a month, about 52 per wellbore. Its strongest month on the record we hold was December 2021, at 609 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 SWAIN, O. L. 109

Who operates SWAIN, O. L. 109?: SWAIN, O. L. 109 is operated by Union Oil Company Of California, Railroad Commission of Texas operator number 876520.
Where is SWAIN, O. L. 109?: SWAIN, O. L. 109 is a Texas oil lease in Van Zandt County, Texas, in Railroad Commission district 05. Its Railroad Commission lease number is 01135.
Is SWAIN, O. L. 109 still producing?: SWAIN, O. L. 109 is currently producing. The most recent month of production reported to the Railroad Commission of Texas for SWAIN, O. L. 109 is August 2026.
How much has SWAIN, O. L. 109 produced?: SWAIN, O. L. 109 has reported 198,790 barrels of oil (bbl) to the Railroad Commission of Texas between January 1993 and August 2026, from 7 wellbores.
How much is SWAIN, O. L. 109 worth?: The remaining production from SWAIN, O. L. 109 is estimated to be worth about $1.1M in total as of 27 August 2026, within a range of $841K to $1.3M. That figure is the whole lease, undivided — not any one owner's share. A royalty interest in SWAIN, O. L. 109 is a fraction of it. The estimate fits an Arps decline curve to the production SWAIN, O. L. 109 has already reported, prices the remaining production at the current forward strip, and discounts it at 12% a year. The figure shown for SWAIN, O. L. 109 is an estimate of value, not an offer and not an appraisal.
How much income does SWAIN, O. L. 109 generate in a year?: SWAIN, O. L. 109 is forecast to net about $243K across the whole undivided lease over the twelve months following 27 August 2026, before income tax. A royalty owner in SWAIN, O. L. 109 receives a fraction of that, set by the decimal interest printed on their check stub.

Lease record

SWAIN, O. L. 109 as filed with the Railroad Commission of Texas
Operator	Union Oil Company Of California
Field	Van
County	Van Zandt County, Texas
RRC district	05
Lease number	01135
Wellbores	7
Reported production	198,790 bbl
First reported	January 1993
Last reported	August 2026
Estimated royalty value	$1.1M

Where SWAIN, O. L. 109 sits

Source: Railroad Commission of Texas lease production records, complete through August 2026. Figures on this page were computed on 27 August 2026.

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.