Oil and gas leases in Union Oil Company Of California

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.

Counties here

Railroad Commission districts

Leases — page 1 of 4

  • SABINE ROYALTY CORP. UNIT NO. 5 — gas, Union Oil Company Of California, Pecos County, 33.2 million reported
  • NORTH RILEY UNIT — oil, Union Oil Company Of California, Gaines County, 27.3 million reported
  • HOPKINS, G. C. GU #1 — gas, Union Oil Company Of California, Rains County, 24.7 million reported
  • DOLLARHIDE UNIT — oil, Union Oil Company Of California, Andrews County, 23.4 million reported
  • MOORE, J. F. UNIT NO.1 — gas, Union Oil Company Of California, Pecos County, 22.5 million reported
  • GRIFFIN, MARGARET T. — gas, Union Oil Company Of California, Pecos County, 22.3 million reported
  • GOODRICH, R.R. GAS UNIT NO. 1 — gas, Union Oil Company Of California, Rains County, 17.1 million reported
  • TYRRELL, W. C. UNIT NO. #1 — gas, Union Oil Company Of California, Pecos County, 16.2 million reported
  • TYRRELL, W. C. UNIT NO. 2 — gas, Union Oil Company Of California, Pecos County, 13.7 million reported
  • DOLLARHIDE UNIT — oil, Union Oil Company Of California, Andrews County, 13.7 million reported
  • FLETCHER, MAX J. — gas, Union Oil Company Of California, Wood County, 13.3 million reported
  • FLETCHER, MAX J. — gas, Union Oil Company Of California, Wood County, 13.0 million reported
  • TYRRELL, W. C., UNIT NO. 3 — gas, Union Oil Company Of California, Pecos County, 11.9 million reported
  • HUDDLESTON, C. L. — gas, Union Oil Company Of California, Rains County, 9.4 million reported
  • REINECKE UNIT — oil, Union Oil Company Of California, Borden County, 9.2 million reported
  • QUINN, B. E. — gas, Union Oil Company Of California, Orange County, 8.6 million reported
  • HOPKINS, G.C. GU #1 — gas, Union Oil Company Of California, Rains County, 8.6 million reported
  • FARNSWORTH UNIT — oil, Union Oil Company Of California, Ochiltree County, 8.0 million reported
  • WAYNE WEST RANCH "A" — gas, Union Oil Company Of California, Crockett County, 8.0 million reported
  • PRICE, AUBREY — gas, Union Oil Company Of California, Pecos County, 7.8 million reported
  • WAYNE WEST RANCH "B" — gas, Union Oil Company Of California, Crockett County, 7.4 million reported
  • CENTRAL VAN WOODBINE UNIT — oil, Union Oil Company Of California, Van Zandt County, 7.3 million reported
  • J.F. MOORE UNIT NO. 1 — gas, Union Oil Company Of California, Pecos County, 7.2 million reported
  • COWDEN, E. W. — gas, Union Oil Company Of California, Winkler County, 6.3 million reported
  • BRADSTREET UNIT — gas, Union Oil Company Of California, Hemphill County, 6.1 million reported
  • EVANS, N. T. — gas, Union Oil Company Of California, Reeves County, 5.8 million reported
  • WAYNE WEST RANCH "B" — gas, Union Oil Company Of California, Crockett County, 5.7 million reported
  • MITCHELL -5- — gas, Union Oil Company Of California, Crockett County, 5.6 million reported
  • SOUTHLAND LD & CATTLE CO UNIT — gas, Union Oil Company Of California, Rains County, 5.6 million reported
  • DOLLARHIDE UNIT — oil, Union Oil Company Of California, Andrews County, 5.6 million reported
  • SMITH, S. G. — gas, Union Oil Company Of California, Hemphill County, 5.4 million reported
  • FLETCHER, MAX J. — gas, Union Oil Company Of California, Wood County, 5.3 million reported
  • GONZALES, RITA — gas, Union Oil Company Of California, Orange County, 5.2 million reported
  • GARRETT TRUST — gas, Union Oil Company Of California, Wood County, 5.0 million reported
  • SUMMERS, E. L. ET AL UNIT — gas, Union Oil Company Of California, Matagorda County, 5.0 million reported
  • PRICE ESTATE UNIT #1 — gas, Union Oil Company Of California, Pecos County, 5.0 million reported
  • PARKER UNIT — oil, Union Oil Company Of California, Andrews County, 4.4 million reported
  • WEST, WAYNE RANCH "B" — gas, Union Oil Company Of California, Crockett County, 4.1 million reported
  • SMYER, EAST /CLEARFORK/ UNIT — oil, Union Oil Company Of California, Hockley County, 3.8 million reported
  • PRICE ESTATE UNIT — gas, Union Oil Company Of California, Pecos County, 3.6 million reported
  • BLACKWATCH (SAN ANDRES) UNIT — oil, Union Oil Company Of California, Gaines County, 3.5 million reported
  • ARCO FEE — gas, Union Oil Company Of California, Liberty County, 3.5 million reported
  • ST. 749-L S/2 NE/4 — gas, Union Oil Company Of California, Mustang Is-LB County, 3.5 million reported
  • ELSINORE "A" — gas, Union Oil Company Of California, Pecos County, 3.4 million reported
  • WAYNE WEST RANCH "A" — gas, Union Oil Company Of California, Crockett County, 3.3 million reported
  • WAYNE WEST RANCH "AB" — gas, Union Oil Company Of California, Crockett County, 3.2 million reported
  • MOSS UNIT — oil, Union Oil Company Of California, Ector County, 3.1 million reported
  • WAYNE WEST RANCH "A" — gas, Union Oil Company Of California, Crockett County, 3.1 million reported
  • ACTON, PAMELA — gas, Union Oil Company Of California, Crockett County, 3.1 million reported
  • PETERSON, RALPH ET AL — gas, Union Oil Company Of California, Matagorda County, 3.0 million reported
  • HUDDLESTON, C.L. — gas, Union Oil Company Of California, Rains County, 3.0 million reported
  • WAYNE WEST RANCH "A" — gas, Union Oil Company Of California, Crockett County, 3.0 million reported
  • WAYNE WEST RANCH "A" — gas, Union Oil Company Of California, Crockett County, 2.9 million reported
  • WAYNE WEST RANCH "B" — gas, Union Oil Company Of California, Crockett County, 2.7 million reported
  • WEST, WAYNE RANCH "A" — gas, Union Oil Company Of California, Crockett County, 2.6 million reported
  • MARLEY, JESS — gas, Union Oil Company Of California, Crockett County, 2.5 million reported
  • HOLT, O. B. -C- — oil, Union Oil Company Of California, Ector County, 2.5 million reported
  • PETERSEN, RALPH ET AL — gas, Union Oil Company Of California, Matagorda County, 2.5 million reported
  • SOUTHWEST ANDREWS UNIT — oil, Union Oil Company Of California, Andrews County, 2.5 million reported
  • SAVAGE, H.S. ET AL — gas, Union Oil Company Of California, Matagorda County, 2.4 million reported
  • WAYNE WEST RANCH "B" — gas, Union Oil Company Of California, Crockett County, 2.2 million reported
  • WAYNE WEST RANCH "A" — gas, Union Oil Company Of California, Crockett County, 2.2 million reported
  • ACTON, PAMELA — gas, Union Oil Company Of California, Crockett County, 2.2 million reported
  • FILLINGIM — gas, Union Oil Company Of California, Hemphill County, 2.1 million reported
  • NEAL, ROXIE — gas, Union Oil Company Of California, Pecos County, 2.1 million reported
  • ACTON, PAMELA — gas, Union Oil Company Of California, Crockett County, 2.1 million reported
  • P. B. M. UNIT — gas, Union Oil Company Of California, Pecos County, 2.0 million reported
  • DOLLARHIDE UNIT — oil, Union Oil Company Of California, Andrews County, 2.0 million reported
  • WAYNE WEST RANCH "B" — gas, Union Oil Company Of California, Val Verde County, 2.0 million reported
  • WEST, WAYNE RANCH "B" — gas, Union Oil Company Of California, Crockett County, 1.8 million reported
  • ACTON, PAMELA — gas, Union Oil Company Of California, Crockett County, 1.8 million reported
  • KILLEBREW — gas, Union Oil Company Of California, Roberts County, 1.7 million reported
  • QUINN, B. E. — gas, Union Oil Company Of California, Orange County, 1.7 million reported
  • BLAKENEY, B. H. /HOLT PAY/ — oil, Union Oil Company Of California, Ector County, 1.7 million reported
  • FEENEY HILL GAS UNIT — gas, Union Oil Company Of California, Rains County, 1.7 million reported
  • WAYNE WEST RANCH "B" — gas, Union Oil Company Of California, Val Verde County, 1.7 million reported
  • COWDEN, E. W. -A- — gas, Union Oil Company Of California, Winkler County, 1.7 million reported
  • WEST, WAYNE RANCH "A" — gas, Union Oil Company Of California, Crockett County, 1.7 million reported
  • EVANS, N. T. — gas, Union Oil Company Of California, Reeves County, 1.6 million reported
  • QUINN, B. E. — gas, Union Oil Company Of California, Orange County, 1.5 million reported
  • ACTON, PAMELA — gas, Union Oil Company Of California, Crockett County, 1.5 million reported
  • ACTON, PAMELA — gas, Union Oil Company Of California, Crockett County, 1.4 million reported
  • SMITH, F. G. — gas, Union Oil Company Of California, Ward County, 1.4 million reported
  • SVRUC UNIT — oil, Union Oil Company Of California, Van Zandt County, 1.4 million reported
  • WEST, WAYNE RANCH "A" — gas, Union Oil Company Of California, Crockett County, 1.3 million reported
  • TYRRELL, W. C., UNIT NO. 1 — gas, Union Oil Company Of California, Pecos County, 1.3 million reported
  • MARLEY '68' — gas, Union Oil Company Of California, Crockett County, 1.2 million reported
  • MARLEY, JESS — gas, Union Oil Company Of California, Crockett County, 1.2 million reported
  • WAYNE WEST RANCH "B" — gas, Union Oil Company Of California, Val Verde County, 1.2 million reported
  • COWDEN, E. W. UNIT — gas, Union Oil Company Of California, Winkler County, 1.2 million reported
  • EVANS, N. T. — gas, Union Oil Company Of California, Reeves County, 1.2 million reported
  • SMITH, F. G. -A- — gas, Union Oil Company Of California, Ward County, 1.2 million reported
  • EVANS, N. T. — gas, Union Oil Company Of California, Reeves County, 1.1 million reported
  • ARCO FEE — gas, Union Oil Company Of California, Liberty County, 1.1 million reported
  • GOODRICH, R.R. GAS UNIT NO. 1 — gas, Union Oil Company Of California, Rains County, 1.1 million reported
  • MARLEY, JESS "B" — gas, Union Oil Company Of California, Crockett County, 1.1 million reported
  • EVANS, N. T. — gas, Union Oil Company Of California, Reeves County, 1.1 million reported
  • VAN,SW LEWISVILLE UNIT — oil, Union Oil Company Of California, Van Zandt County, 1.1 million reported
  • MASTEN UNIT — oil, Union Oil Company Of California, Cochran County, 968 thousand reported
  • STOVALL — gas, Union Oil Company Of California, Wharton County, 962 thousand reported
  • WAYNE WEST RANCH "A" — gas, Union Oil Company Of California, Crockett County, 927 thousand reported
  • SWAIN, O. L. 11 — oil, Union Oil Company Of California, Van Zandt County, 902 thousand reported
  • COCHRAN, W. C. — oil, Union Oil Company Of California, Ector County, 888 thousand reported
  • STATE-TREES "18" — gas, Union Oil Company Of California, Pecos County, 888 thousand reported
  • SCHOENHALS — gas, Union Oil Company Of California, Lipscomb County, 873 thousand reported
  • BRACKEN, J. A. 503 — oil, Union Oil Company Of California, Van Zandt County, 855 thousand reported
  • SWAIN, D. L. 11 -AC- — oil, Union Oil Company Of California, Van Zandt County, 852 thousand reported
  • MARLEY, JESS "B" — gas, Union Oil Company Of California, Crockett County, 848 thousand reported
  • JOHNSON, E. B. — gas, Union Oil Company Of California, Hutchinson County, 828 thousand reported
  • MASTEN -J- — gas, Union Oil Company Of California, Cochran County, 822 thousand reported
  • TOAD — oil, Union Oil Company Of California, Ector County, 821 thousand reported
  • KECK, L. -A- — oil, Union Oil Company Of California, Montague County, 810 thousand reported
  • FRANCIS, G. W. — gas, Union Oil Company Of California, Hansford County, 788 thousand reported
  • STARK FOUNDATION — gas, Union Oil Company Of California, Orange County, 774 thousand reported
  • ACTON, PAMELA — gas, Union Oil Company Of California, Crockett County, 759 thousand reported
  • HEFLEY — gas, Union Oil Company Of California, Hemphill County, 747 thousand reported
  • CHALK, OTIS — oil, Union Oil Company Of California, Howard County, 738 thousand reported
  • HARRIS, T. B. — oil, Union Oil Company Of California, Gregg County, 737 thousand reported
  • TYRRELL, W. C., UNIT NO. 1 — gas, Union Oil Company Of California, Pecos County, 733 thousand reported
  • YORK, W. A. 13 — oil, Union Oil Company Of California, Van Zandt County, 732 thousand reported
  • BRACKEN, J. A. 35 — oil, Union Oil Company Of California, Van Zandt County, 727 thousand reported
  • ARCO FEE — gas, Union Oil Company Of California, Liberty County, 702 thousand reported
  • WELTMER, T. C. — gas, Union Oil Company Of California, Gaines County, 668 thousand reported
  • FULK, MONTGOMERY — gas, Union Oil Company Of California, Pecos County, 665 thousand reported
  • MARLEY, JESS — gas, Union Oil Company Of California, Crockett County, 651 thousand reported
  • EVANS, N. T. — gas, Union Oil Company Of California, Reeves County, 645 thousand reported
  • MARLEY, JESS — gas, Union Oil Company Of California, Crockett County, 622 thousand reported
  • POWELL, R. V. ETAL — oil, Union Oil Company Of California, Midland County, 606 thousand reported
  • MORRISON, MARY T., -D- — gas, Union Oil Company Of California, Roberts County, 605 thousand reported
  • ANTHONY, H. F. — gas, Union Oil Company Of California, Reeves County, 601 thousand reported
  • ANTHONY, H. F. — gas, Union Oil Company Of California, Reeves County, 601 thousand reported
  • COWDEN, E. P. "A-34" — gas, Union Oil Company Of California, Andrews County, 595 thousand reported
  • HOPKINS, C. G. GAS UNIT #1 — gas, Union Oil Company Of California, Rains County, 594 thousand reported
  • TYRRELL, W. C., UNIT NO. 1 — gas, Union Oil Company Of California, Pecos County, 584 thousand reported
  • MAURITZ, T.N. — gas, Union Oil Company Of California, Jackson County, 581 thousand reported
  • EVANS, N. T. — gas, Union Oil Company Of California, Reeves County, 575 thousand reported
  • BINGHAM, M. K. "AB" — oil, Union Oil Company Of California, Garza County, 553 thousand reported
  • BRAWNER, L. M. 10 — gas, Union Oil Company Of California, Van Zandt County, 547 thousand reported
  • FULK, MONTGOMERY — gas, Union Oil Company Of California, Pecos County, 540 thousand reported
  • HEINER ESTATE — gas, Union Oil Company Of California, Pecos County, 532 thousand reported
  • UNIVERSITY -JC- — oil, Union Oil Company Of California, Andrews County, 517 thousand reported
  • THOMPSON, I. W. 401 — oil, Union Oil Company Of California, Van Zandt County, 502 thousand reported
  • BRACKEN, J. A. 503 — oil, Union Oil Company Of California, Van Zandt County, 494 thousand reported
  • PARKER, J. E. "T" — oil, Union Oil Company Of California, Andrews County, 488 thousand reported
  • YORK, W. A. 13 — oil, Union Oil Company Of California, Van Zandt County, 477 thousand reported
  • ANTHONY, H. F. — gas, Union Oil Company Of California, Reeves County, 473 thousand reported
  • STOKER, K. ET UX "C" — oil, Union Oil Company Of California, Garza County, 459 thousand reported
  • TOAD-A- — oil, Union Oil Company Of California, Ector County, 455 thousand reported
  • ELSINORE-MIDWEST UNIT — gas, Union Oil Company Of California, Pecos County, 445 thousand reported
  • SHIVERS, J. R. 12 — oil, Union Oil Company Of California, Van Zandt County, 442 thousand reported
  • ACTON, PAMELA — gas, Union Oil Company Of California, Crockett County, 431 thousand reported
  • BRANGUS UNIVERSITY — oil, Union Oil Company Of California, Andrews County, 427 thousand reported
  • ANTHONY, H. F. — gas, Union Oil Company Of California, Reeves County, 415 thousand reported
  • HUGHES "A" — gas, Union Oil Company Of California, Reagan County, 411 thousand reported
  • CHALK, OTIS — oil, Union Oil Company Of California, Howard County, 410 thousand reported
  • STOKER, K. ET UX "C" — oil, Union Oil Company Of California, Garza County, 406 thousand reported
  • HOLT, O. B., JR., ETAL — oil, Union Oil Company Of California, Ector County, 399 thousand reported
  • UNIVERSITY -36- — oil, Union Oil Company Of California, Andrews County, 393 thousand reported
  • PRICE ESTATE UNIT #1 — gas, Union Oil Company Of California, Pecos County, 391 thousand reported
  • E. W. COWDEN UNIT — gas, Union Oil Company Of California, Winkler County, 389 thousand reported
  • SVRUC UNIT — gas, Union Oil Company Of California, Van Zandt County, 372 thousand reported
  • MORRISON, MARY T. — gas, Union Oil Company Of California, Roberts County, 371 thousand reported
  • COWDEN, E. P. "A-15" — gas, Union Oil Company Of California, Andrews County, 365 thousand reported
  • MOSS UNIT A — oil, Union Oil Company Of California, Ector County, 364 thousand reported
  • CLARK, FRANK — oil, Union Oil Company Of California, Andrews County, 364 thousand reported
  • BRAWNER, L. M. 10 — oil, Union Oil Company Of California, Van Zandt County, 361 thousand reported
  • MANUEL HEIRS — gas, Union Oil Company Of California, Orange County, 360 thousand reported
  • JOHNSON, E. B. — gas, Union Oil Company Of California, Hutchinson County, 356 thousand reported
  • HUGHES "A" — gas, Union Oil Company Of California, Reagan County, 356 thousand reported
  • THOMPSON, I. W. 401 — oil, Union Oil Company Of California, Van Zandt County, 355 thousand reported
  • PARKER, J. E. -P- (AMOCO) — oil, Union Oil Company Of California, Andrews County, 353 thousand reported
  • FOWLER, E. L. 302 — oil, Union Oil Company Of California, Van Zandt County, 351 thousand reported
  • HOLT -D- — oil, Union Oil Company Of California, Ector County, 342 thousand reported
  • ANTHONY, H. F. — gas, Union Oil Company Of California, Reeves County, 337 thousand reported
  • ARCO FEE — gas, Union Oil Company Of California, Liberty County, 336 thousand reported
  • TUNNELL, I. P. 300 — oil, Union Oil Company Of California, Van Zandt County, 335 thousand reported
  • STOKER, K. ET UX "C" — oil, Union Oil Company Of California, Garza County, 329 thousand reported
  • FASKEN BLOCK "BA" — gas, Union Oil Company Of California, Andrews County, 329 thousand reported
  • HUGHES "A" — gas, Union Oil Company Of California, Reagan County, 325 thousand reported
  • JARMAN, W. T. 37 — oil, Union Oil Company Of California, Van Zandt County, 316 thousand reported
  • BRAWNER, L. M. 10 — oil, Union Oil Company Of California, Van Zandt County, 315 thousand reported
  • PERKINS — oil, Union Oil Company Of California, Andrews County, 315 thousand reported
  • DOSS-YATES — gas, Union Oil Company Of California, Gaines County, 311 thousand reported
  • HOLT, O. B. JR. -A- — oil, Union Oil Company Of California, Ector County, 300 thousand reported
  • SMITH, F. B. 104 — oil, Union Oil Company Of California, Van Zandt County, 300 thousand reported
  • PARKER, J. E. -E- UNIT — oil, Union Oil Company Of California, Andrews County, 292 thousand reported
  • OLSON, JO ET AL — gas, Union Oil Company Of California, Matagorda County, 288 thousand reported
  • JOHNSON, SID — gas, Union Oil Company Of California, Orange County, 275 thousand reported
  • BRACKEN, J. A. 35 — oil, Union Oil Company Of California, Van Zandt County, 273 thousand reported
  • KEMP DEEP — oil, Union Oil Company Of California, Andrews County, 271 thousand reported
  • STEWART, MACO — oil, Union Oil Company Of California, Galveston County, 268 thousand reported
  • PARKER, J. E. "Z" — oil, Union Oil Company Of California, Andrews County, 266 thousand reported
  • SWAIN, W. F. 36 — oil, Union Oil Company Of California, Van Zandt County, 257 thousand reported
  • HOWELL, D. R. 45 — oil, Union Oil Company Of California, Van Zandt County, 253 thousand reported
  • PARKER, J. E. -B- — oil, Union Oil Company Of California, Andrews County, 251 thousand reported
  • SWAIN, W. F. 9 — gas, Union Oil Company Of California, Van Zandt County, 247 thousand reported
  • ROWLAND, J. W. -B- — oil, Union Oil Company Of California, Montague County, 239 thousand reported
  • BRAWNER, L. M. 10 — oil, Union Oil Company Of California, Van Zandt County, 237 thousand reported
  • PARKER, J. E. -E- — oil, Union Oil Company Of California, Andrews County, 234 thousand reported
  • WHITE, W. H. 504 — oil, Union Oil Company Of California, Van Zandt County, 234 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.