Oil and gas leases in Union Oil Company Of California — page 3

Union Oil Company Of California is a Texas operator, Commission number 876520, with 717 leases reporting production across 45 counties. 518 of them are oil leases and 199 are gas leases. Between them they carry 4,398 wellbores. Reported volumes run from January 1993 to August 2026 and come to 167.2 million barrels of oil and 452.4 million Mcf of gas. Every lease below has its own page with a decline-curve forecast and an estimate of what the whole lease is worth.

Key facts about Union Oil Company Of California

How many oil and gas leases are in Union Oil Company Of California?: Union Oil Company Of California has 717 oil and gas leases with production reported to the Railroad Commission of Texas, as of August 2026.
How much oil and gas has Union Oil Company Of California produced?: Leases in Union Oil Company Of California have reported 167,159,100 barrels of oil (bbl) and 452,428,612 thousand cubic feet of gas (Mcf) to the Railroad Commission of Texas between January 1993 and August 2026.
How much are mineral rights in Union Oil Company Of California worth?: There is no single figure: what a mineral or royalty interest in Union Oil Company Of California is worth depends on the individual lease, its decline, and the share the owner holds. Each of the 717 leases listed here has its own page with the full production history the operator reported, a decline-curve forecast, and an estimate of what a royalty interest in it is worth today.

Leases — page 3 of 4

WIESE, DELLA — oil, Union Oil Company Of California, Jackson County, 52 thousand reported
PARKER, J. E. -U- — oil, Union Oil Company Of California, Andrews County, 52 thousand reported
JARMAN, W. T. 37 — oil, Union Oil Company Of California, Van Zandt County, 52 thousand reported
ANTHONY, H. F. — gas, Union Oil Company Of California, Reeves County, 51 thousand reported
VAUGHAN, R. L. — oil, Union Oil Company Of California, Crockett County, 51 thousand reported
PARKER, J. E. -F- — oil, Union Oil Company Of California, Andrews County, 51 thousand reported
HODGSON — oil, Union Oil Company Of California, Hemphill County, 48 thousand reported
SPACEK, FRANK — gas, Union Oil Company Of California, Jackson County, 48 thousand reported
SWAIN, O. L. 11 — oil, Union Oil Company Of California, Van Zandt County, 47 thousand reported
ANTHONY, H. F. — oil, Union Oil Company Of California, Reeves County, 47 thousand reported
WOODRUFF "A" — oil, Union Oil Company Of California, Hockley County, 46 thousand reported
RAY, S. R. — oil, Union Oil Company Of California, Van Zandt County, 46 thousand reported
CRIM, J. F. 16 — oil, Union Oil Company Of California, Van Zandt County, 46 thousand reported
MAURITZ, T. N. — oil, Union Oil Company Of California, Jackson County, 45 thousand reported
HOWELL, D. R. 45 — oil, Union Oil Company Of California, Van Zandt County, 45 thousand reported
UNIVERSITY "JA" — oil, Union Oil Company Of California, Andrews County, 44 thousand reported
SWAIN, O. L. 11 AC — oil, Union Oil Company Of California, Van Zandt County, 44 thousand reported
WOLF, W. — oil, Union Oil Company Of California, Borden County, 44 thousand reported
BRACKEN, J. A. 503 — oil, Union Oil Company Of California, Van Zandt County, 43 thousand reported
PARKER, J. E. -A-TR — oil, Union Oil Company Of California, Andrews County, 43 thousand reported
WHITE 502 — oil, Union Oil Company Of California, Van Zandt County, 43 thousand reported
MOSS, PAUL -38- PE — oil, Union Oil Company Of California, Ector County, 43 thousand reported
CRAVENS, E. T. — oil, Union Oil Company Of California, Jackson County, 42 thousand reported
DEFORD UNIT — oil, Union Oil Company Of California, Andrews County, 42 thousand reported
LONG — oil, Union Oil Company Of California, Howard County, 42 thousand reported
CRIM, J. F. 16 — oil, Union Oil Company Of California, Van Zandt County, 41 thousand reported
PARKER, J. E. -D- — oil, Union Oil Company Of California, Andrews County, 41 thousand reported
UNIVERSITY "B" — oil, Union Oil Company Of California, Crane County, 41 thousand reported
PARKER, J. E. "D" — oil, Union Oil Company Of California, Andrews County, 41 thousand reported
ELSINORE "A" — gas, Union Oil Company Of California, Pecos County, 41 thousand reported
FOSTER, W. L., JR., -B- — oil, Union Oil Company Of California, Sterling County, 40 thousand reported
PARKER, J. E. -E- — oil, Union Oil Company Of California, Andrews County, 40 thousand reported
UNIVERSITY -H- — oil, Union Oil Company Of California, Crane County, 40 thousand reported
BRAWNER, L. M. 10 — gas, Union Oil Company Of California, Van Zandt County, 39 thousand reported
PARKER, BESSIE O. — oil, Union Oil Company Of California, Andrews County, 39 thousand reported
PARKER, J. E. — oil, Union Oil Company Of California, Andrews County, 39 thousand reported
FORD — oil, Union Oil Company Of California, Andrews County, 38 thousand reported
SHIVERS, J.R. 12 — gas, Union Oil Company Of California, Van Zandt County, 38 thousand reported
SHIVERS, J. R. 12 — oil, Union Oil Company Of California, Van Zandt County, 37 thousand reported
SB-A — oil, Union Oil Company Of California, Terry County, 37 thousand reported
UNIVERSITY "12-F" — oil, Union Oil Company Of California, Andrews County, 37 thousand reported
MONTROSE — oil, Union Oil Company Of California, Gaines County, 36 thousand reported
SHIVERS, J.R. 12 — gas, Union Oil Company Of California, Van Zandt County, 35 thousand reported
SVRUC 29 — oil, Union Oil Company Of California, Van Zandt County, 35 thousand reported
EVANS, N. T. — oil, Union Oil Company Of California, Reeves County, 35 thousand reported
GILBERT, H. C. 43 — oil, Union Oil Company Of California, Van Zandt County, 34 thousand reported
DUBOSE-WILLIFORD — gas, Union Oil Company Of California, Freestone County, 34 thousand reported
SPARKS, S. L. — oil, Union Oil Company Of California, Gaines County, 33 thousand reported
FOWLER, B. M. 303 — oil, Union Oil Company Of California, Van Zandt County, 33 thousand reported
WIESE, DELLA — gas, Union Oil Company Of California, Jackson County, 33 thousand reported
CRIM, B. E. 15 — oil, Union Oil Company Of California, Van Zandt County, 33 thousand reported
PALMER, J. M. OIL UNIT — oil, Union Oil Company Of California, Van Zandt County, 33 thousand reported
BRAWNER, L. M. — oil, Union Oil Company Of California, Van Zandt County, 33 thousand reported
LEONARD, J. H. 30 — oil, Union Oil Company Of California, Van Zandt County, 32 thousand reported
LOCKHART & BROWN "17-B" — oil, Union Oil Company Of California, Andrews County, 32 thousand reported
PARKER, J. E. -AB- — oil, Union Oil Company Of California, Andrews County, 32 thousand reported
ANTHONY, H. F. — gas, Union Oil Company Of California, Reeves County, 32 thousand reported
YORK, W.A. 13 — oil, Union Oil Company Of California, Van Zandt County, 32 thousand reported
PARKER, J. E. -N- — oil, Union Oil Company Of California, Andrews County, 32 thousand reported
COWDEN, E. P. — oil, Union Oil Company Of California, Andrews County, 32 thousand reported
HOWELL, R. A. 44 — oil, Union Oil Company Of California, Van Zandt County, 31 thousand reported
PARKER, J. E. "T" — oil, Union Oil Company Of California, Andrews County, 31 thousand reported
PARKER, J. E. -D- (AMOCO) — oil, Union Oil Company Of California, Andrews County, 31 thousand reported
GARRETT TRUST — oil, Union Oil Company Of California, Wood County, 31 thousand reported
PARKER, J. E. — oil, Union Oil Company Of California, Andrews County, 30 thousand reported
MILLER, I. D. 34 — oil, Union Oil Company Of California, Van Zandt County, 30 thousand reported
FREEMAN, L. V. 208 — oil, Union Oil Company Of California, Van Zandt County, 30 thousand reported
FULK, MONTGOMERY — gas, Union Oil Company Of California, Pecos County, 29 thousand reported
CRADDOCK — oil, Union Oil Company Of California, Andrews County, 29 thousand reported
PARKER, J. E. -AA- — oil, Union Oil Company Of California, Andrews County, 28 thousand reported
BRAWNER, L. M. 10 — gas, Union Oil Company Of California, Van Zandt County, 27 thousand reported
SWAIN, W. F. 9 — oil, Union Oil Company Of California, Van Zandt County, 27 thousand reported
LOCKHART & BROWN "14" — oil, Union Oil Company Of California, Andrews County, 27 thousand reported
PARKER, J. E. -AB- — oil, Union Oil Company Of California, Andrews County, 27 thousand reported
STATE OF TEXAS AG — oil, Union Oil Company Of California, Andrews County, 27 thousand reported
MILLER-CONRAD — oil, Union Oil Company Of California, Borden County, 27 thousand reported
SCHARBAUER-EIDSON -B- — oil, Union Oil Company Of California, Ector County, 27 thousand reported
ANTHONY, H. F. — oil, Union Oil Company Of California, Reeves County, 26 thousand reported
OLIVER, J. R., 207 — oil, Union Oil Company Of California, Van Zandt County, 26 thousand reported
HOLT — oil, Union Oil Company Of California, Ector County, 26 thousand reported
MCPHEARSON, J. F. 206 — oil, Union Oil Company Of California, Van Zandt County, 26 thousand reported
COOK 42 — oil, Union Oil Company Of California, Van Zandt County, 25 thousand reported
MAURITZ, T. N. — gas, Union Oil Company Of California, Jackson County, 25 thousand reported
SWAIN, W. F. 9 — oil, Union Oil Company Of California, Van Zandt County, 25 thousand reported
PARKER, J. E., -J- — oil, Union Oil Company Of California, Andrews County, 25 thousand reported
CROW, J. E. — oil, Union Oil Company Of California, Montague County, 25 thousand reported
UNIVERSITY (M) -JJ- — oil, Union Oil Company Of California, Crockett County, 24 thousand reported
PARKER, J. E. -F- — oil, Union Oil Company Of California, Andrews County, 24 thousand reported
YORK, W. A. 13 — oil, Union Oil Company Of California, Van Zandt County, 24 thousand reported
BRAWNER -10- — oil, Union Oil Company Of California, Van Zandt County, 24 thousand reported
CAMPER, B. W. 110 — oil, Union Oil Company Of California, Van Zandt County, 24 thousand reported
UNIVERSITY 12-F — gas, Union Oil Company Of California, Andrews County, 24 thousand reported
WALKER — oil, Union Oil Company Of California, Andrews County, 24 thousand reported
COWDEN, JERRY — oil, Union Oil Company Of California, Crane County, 23 thousand reported
ARGO-MOSS -B- — oil, Union Oil Company Of California, Ector County, 23 thousand reported
PARKER, J. E. "C" — oil, Union Oil Company Of California, Andrews County, 23 thousand reported
PARKER, J.E. -P- — oil, Union Oil Company Of California, Andrews County, 23 thousand reported
PETERS, R. H. 29 — oil, Union Oil Company Of California, Van Zandt County, 23 thousand reported
THOMPSON, I.W. 401 — gas, Union Oil Company Of California, Van Zandt County, 22 thousand reported
PARKER, J. E. -D- (AMOCO) — oil, Union Oil Company Of California, Andrews County, 22 thousand reported
ANTHONY, H. F. — gas, Union Oil Company Of California, Reeves County, 22 thousand reported
SWAIN, W. F. 14 — oil, Union Oil Company Of California, Van Zandt County, 21 thousand reported
BRAWNER, L. M. 10 — oil, Union Oil Company Of California, Van Zandt County, 21 thousand reported
CLARK, FRANK — oil, Union Oil Company Of California, Andrews County, 21 thousand reported
MAXFIELD 38 — oil, Union Oil Company Of California, Van Zandt County, 21 thousand reported
RAY, S. R. — oil, Union Oil Company Of California, Van Zandt County, 20 thousand reported
CRIM, B. E. 15 — oil, Union Oil Company Of California, Van Zandt County, 20 thousand reported
PARKER, J.E. "F" — oil, Union Oil Company Of California, Andrews County, 20 thousand reported
PARKER, J. E. -E- — oil, Union Oil Company Of California, Andrews County, 20 thousand reported
ZETKA, JOSEF — oil, Union Oil Company Of California, Jackson County, 20 thousand reported
MORRISON, MARY T. — oil, Union Oil Company Of California, Roberts County, 20 thousand reported
PARKER, J. E. "U" (AMOCO) — oil, Union Oil Company Of California, Andrews County, 19 thousand reported
PARKER, J.E. -H- — oil, Union Oil Company Of California, Andrews County, 19 thousand reported
SHIVERS, J. R. 12 — oil, Union Oil Company Of California, Van Zandt County, 19 thousand reported
OLSON, J. O. ET AL — oil, Union Oil Company Of California, Matagorda County, 19 thousand reported
SWAIN, O. L. 11 "A-C" — oil, Union Oil Company Of California, Van Zandt County, 19 thousand reported
SPACEK, FRANK — oil, Union Oil Company Of California, Jackson County, 19 thousand reported
PARKER, J. E. -Y- — oil, Union Oil Company Of California, Andrews County, 19 thousand reported
DEFORD, R. K. — oil, Union Oil Company Of California, Andrews County, 19 thousand reported
JONES ESTATE — oil, Union Oil Company Of California, Gaines County, 18 thousand reported
CRIM, R. C. 28 — oil, Union Oil Company Of California, Van Zandt County, 18 thousand reported
CRIM, J. F. 16 — oil, Union Oil Company Of California, Van Zandt County, 18 thousand reported
PARKER, J.E. FEE "K" — oil, Union Oil Company Of California, Andrews County, 18 thousand reported
SWAIN, W. F. 9 — oil, Union Oil Company Of California, Van Zandt County, 18 thousand reported
PARKER, J. E., -D- UNIT — oil, Union Oil Company Of California, Andrews County, 17 thousand reported
DOWDLE, L. A. 205 — oil, Union Oil Company Of California, Van Zandt County, 17 thousand reported
PARKER, J. E. -AA- — oil, Union Oil Company Of California, Andrews County, 17 thousand reported
SMITH 104 — oil, Union Oil Company Of California, Van Zandt County, 17 thousand reported
CADE, D. F. OIL UNIT — oil, Union Oil Company Of California, Van Zandt County, 17 thousand reported
MILLER - CONRAD — oil, Union Oil Company Of California, Borden County, 17 thousand reported
FORD — oil, Union Oil Company Of California, Andrews County, 16 thousand reported
SWAIN, W F 9 — oil, Union Oil Company Of California, Van Zandt County, 16 thousand reported
COWDEN, JERRY — oil, Union Oil Company Of California, Crane County, 16 thousand reported
BOYD CONSOLIDATED — oil, Union Oil Company Of California, Scurry County, 15 thousand reported
BUCKHAULTS, VIVA -B- — oil, Union Oil Company Of California, Ochiltree County, 15 thousand reported
HOLT — oil, Union Oil Company Of California, Ector County, 15 thousand reported
PARKER, J. E. -S- — oil, Union Oil Company Of California, Andrews County, 15 thousand reported
BOYD, M. M. — oil, Union Oil Company Of California, Scurry County, 15 thousand reported
HOLT, O. B., TRACT 1 — oil, Union Oil Company Of California, Ector County, 15 thousand reported
SOUTHEAST VAN LEWISVILLE UNIT — oil, Union Oil Company Of California, Van Zandt County, 15 thousand reported
SWAIN, O. L. 11B — oil, Union Oil Company Of California, Van Zandt County, 15 thousand reported
MORRIS, W. E. 601 — oil, Union Oil Company Of California, Van Zandt County, 14 thousand reported
PARKER, J. E. -D- — oil, Union Oil Company Of California, Andrews County, 14 thousand reported
SWAIN, O. L. #11 — oil, Union Oil Company Of California, Van Zandt County, 14 thousand reported
WRIGHT, D. S. "M" — oil, Union Oil Company Of California, Cochran County, 14 thousand reported
PARKER, J. E. "AD" — oil, Union Oil Company Of California, Andrews County, 13 thousand reported
MAURITZ, T.N. — oil, Union Oil Company Of California, Jackson County, 13 thousand reported
PARKER, J. E. "T" — oil, Union Oil Company Of California, Andrews County, 13 thousand reported
PARKER, J. E. "X" — oil, Union Oil Company Of California, Andrews County, 13 thousand reported
BRACKEN, J.A. 503 — gas, Union Oil Company Of California, Van Zandt County, 13 thousand reported
GENGE — gas, Union Oil Company Of California, Rains County, 12 thousand reported
J.A. BRACKEN 35 — oil, Union Oil Company Of California, Van Zandt County, 12 thousand reported
MAURITZ, T. N. — oil, Union Oil Company Of California, Jackson County, 12 thousand reported
MACINTOSH — oil, Union Oil Company Of California, Gaines County, 12 thousand reported
SMITH, L. A. 103 — oil, Union Oil Company Of California, Van Zandt County, 12 thousand reported
STEWART, J. C. 48 — oil, Union Oil Company Of California, Van Zandt County, 12 thousand reported
MASTEN "A" — oil, Union Oil Company Of California, Cochran County, 12 thousand reported
SPACEK, FRANK — gas, Union Oil Company Of California, Jackson County, 11 thousand reported
UNIVERSITY 12-F — gas, Union Oil Company Of California, Andrews County, 11 thousand reported
HAMONS, DAN — oil, Union Oil Company Of California, Jackson County, 11 thousand reported
UNIVERSITY -JA — oil, Union Oil Company Of California, Andrews County, 11 thousand reported
PARKER, J. E. -B- — oil, Union Oil Company Of California, Andrews County, 10 thousand reported
STATE OF TEXAS -AG- — oil, Union Oil Company Of California, Andrews County, 10 thousand reported
STOVALL — gas, Union Oil Company Of California, Wharton County, 10 thousand reported
TRINITY MATERIALS — gas, Union Oil Company Of California, Henderson County, 10 thousand reported
PARKER, J. E. -A- — oil, Union Oil Company Of California, Andrews County, 10 thousand reported
HARTT 128 — oil, Union Oil Company Of California, Van Zandt County, 10 thousand reported
PETTY, J. T. 39 — oil, Union Oil Company Of California, Van Zandt County, 10 thousand reported
DEEP ROCK STATE — oil, Union Oil Company Of California, Andrews County, 10 thousand reported
MASTEN "J" — oil, Union Oil Company Of California, Cochran County, 10 thousand reported
COOK, W. H. 42 — oil, Union Oil Company Of California, Van Zandt County, 10 thousand reported
MASTEN "D" — oil, Union Oil Company Of California, Cochran County, 10 thousand reported
CLARK, FRANK — oil, Union Oil Company Of California, Andrews County, 10 thousand reported
BOLIN, M. R. 51 — oil, Union Oil Company Of California, Van Zandt County, 10 thousand reported
SPACEK, FRANK — gas, Union Oil Company Of California, Jackson County, 10 thousand reported
HALLIDAY — oil, Union Oil Company Of California, Andrews County, 10 thousand reported
PARKER, BESSIE O. — oil, Union Oil Company Of California, Andrews County, 10 thousand reported
COX UNIT -A- — oil, Union Oil Company Of California, Andrews County, 9 thousand reported
WIESE, DELLA — oil, Union Oil Company Of California, Jackson County, 9 thousand reported
WHITE, W.H. 501 — oil, Union Oil Company Of California, Van Zandt County, 9 thousand reported
FORD, H.M. -F- — oil, Union Oil Company Of California, Andrews County, 9 thousand reported
OLIVER,J.R. 207 — oil, Union Oil Company Of California, Van Zandt County, 9 thousand reported
PARKER, J. E. -AA- — oil, Union Oil Company Of California, Andrews County, 9 thousand reported
EVANS, N. T. — gas, Union Oil Company Of California, Reeves County, 9 thousand reported
PARKER, J. E. "AA" — oil, Union Oil Company Of California, Andrews County, 9 thousand reported
CRIM, B. E. 15 — oil, Union Oil Company Of California, Van Zandt County, 9 thousand reported
PARKER, J. E. -D- (AMOCO) — oil, Union Oil Company Of California, Andrews County, 8 thousand reported
STATE OF TEXAS AG — oil, Union Oil Company Of California, Andrews County, 8 thousand reported
BRACKEN, J. A. 35 — oil, Union Oil Company Of California, Van Zandt County, 8 thousand reported
TUNNELL, A. G. 8 — oil, Union Oil Company Of California, Van Zandt County, 8 thousand reported
NIEBUHR, A. L. — oil, Union Oil Company Of California, Jackson County, 8 thousand reported
THOMPSON, J. T. 49 — oil, Union Oil Company Of California, Van Zandt County, 8 thousand reported
TUNNELL, A.R.'59' — oil, Union Oil Company Of California, Van Zandt County, 8 thousand reported
ARGO-MOSS — oil, Union Oil Company Of California, Ector County, 8 thousand reported
STARK FOUNDATION — gas, Union Oil Company Of California, Orange County, 8 thousand reported
PARKER, J. E. -B- — oil, Union Oil Company Of California, Andrews County, 8 thousand reported
SUMMERS, E.L. UNIT — oil, Union Oil Company Of California, Matagorda County, 8 thousand reported
CRIM, R. C. 28 — oil, Union Oil Company Of California, Van Zandt County, 8 thousand reported
BRAWNER, L. M. 10 — oil, Union Oil Company Of California, Van Zandt County, 7 thousand reported
HAMONS, DAN — oil, Union Oil Company Of California, Jackson County, 7 thousand reported

Production figures are as reported to the Railroad Commission of Texas. Values shown on lease pages are estimates produced by fitting a decline curve to that reported history; they are not offers or appraisals.