OPERATORS · RRC 876352 · P-5 STATUS Y
Union Oil Co of California
Los Angeles, CA
Watch this operatorUnion Oil CO Of California has filed no drilling permits in the past 12 months; its most recent permit was issued September 6, 1990.
The RRC wellbore file lists 10 wells under its operatorship.
210 drilling permits have been issued to this operator number since 1985; its P-5 organization report was last filed October 9, 1991.
- 0
- permits, last 12 months
- —
- vs prior 12 months (0)
- 0
- counties, 12 months
- 0
- producing wells, of 10 of record
- 0
- leases it reports
- —
- horizontal, 12 months
WINDOWS ON THE RRC ISSUE DATE · COMPUTED OCT 29, 2026
From permit to spud
FROM THE DATES ON ITS W-1 PERMITS · ALL TIME
A permit is a plan, not a well. These figures count only permits old enough to have spudded, six months and more, and read the spud, cancel, and expiry dates the RRC records on each one.
- 25%
- spud rate · 53 of 210 mature permits
- 20
- median days permit to spud · middle half 13–32
- 0
- spuds, last 180 days
- 1%
- cancelled · 2 permits
- 152
- expired undrilled
- 42
- permits a year over 5 active years
Where
Counties by permits in the last 12 months, with all-time permits and current wells of record there.
| County | 12 mo | All time | Wells | Last |
|---|---|---|---|---|
| Van Zandt county → | — | 159 | 6 | Aug 28, 1990 |
| Jackson county → | — | 28 | 1 | Sep 6, 1990 |
| Wharton county → | — | 6 | 1 | Apr 26, 1990 |
| Madison county → | — | 4 | 0 | Sep 29, 1989 |
| Matagorda county → | — | 4 | 1 | Sep 2, 1988 |
| Galveston county → | — | 3 | 1 | Feb 6, 1987 |
| Fort Bend county → | — | 2 | 0 | Oct 6, 1989 |
| Brazoria county → | — | 1 | 0 | Apr 14, 1989 |
| Henderson county → | — | 1 | 0 | Jun 15, 1990 |
| Houston county → | — | 1 | 0 | Nov 10, 1989 |
| Polk county → | — | 1 | 0 | Dec 16, 1985 |
All 210 permits, searchable → · Leases it reports → · On the map →
Formations in its completed wells
Tops reported on completion filings for wells it operates. RRC wellbore file. About tops →
Production by month
PDQ LEASE REPORTS · REPORTED THROUGH APR 2026
Barrels on leases where this operator filed the production report. Lease-level by design; the latest months are revised upward as late reports arrive. How production is reported →
- 0
- bbl oil, last 12 reported months
- —
- vs the 12 months before
- 0
- mcf gas incl. casinghead, last 12
- 0
- bbl oil since reporting began
No lease production reported under this operator number in the last three years.
Beyond the permit record
RRC wellbore file
Wells of record
- 10
- on the schedule
- 0
- producing
- 0
- shut in
- 0
- injection
- 0
- temp. abandoned
- 3
- plugged
How it got them
- 2
- permitted itself
- 2
- acquired from others
- 91
- permitted, now run by others
Acquired means the well's permit names a different operator than the schedule does today. Transfers and operator numbers →
RRC UIC permits · H-10 reported volumes
Disposal and injection
- 0
- active UIC permits of 4
- 0
- permitted bbl/day, active
- 0
- bbl injected, last 12 reported months
- Jun 2025
- reported through
Permitted volume is a ceiling, not throughput. How to read it →
Permit types
Last 12 months against the prior 12, and all time. A type opens the permit history filtered to it. What the types mean →
| Type | 12 mo | Prior 12 | All time |
|---|---|---|---|
| Drill | 0 | 0 | 136 |
| Recompletion | 0 | 0 | 74 |
Fields
RRC regulatory fields with the most wells of record under this operator. The field opens its page; the count opens this operator's wells in it.
| Field | Wells | Producing |
|---|---|---|
| Van93042001 | 6 | 0 |
| Ganado West (6300-B)33898943 | 1 | 0 |
| Gillock (Big Gas)34925037 | 1 | 0 |
| Louise55120001 | 1 | 0 |
| Sugar Valley N. (Union)86962852 | 1 | 0 |
P-5 organization report
As registered with the RRC. About the P-5 →
- Registration
- Status code Y
- Last filed Oct 9, 1991
- Address
- 1201 West Fifth St. - Room 1104
- Los Angeles, CA 90017
- Officers and agents
- Richardson, Dee · Texas Resident Agent
- Stegemeir, Richard J. · President/Chairman/Ceo
- Union Oil Company of California · General Partner
Latest permits
NEWEST FIRST BY ISSUE DATE · FILED OR ON WELLS IT NOW OPERATES
| Permit | Seen | Issued | Operator | County | Lease / well | Depth | API |
|---|---|---|---|---|---|---|---|
| 646104 | Dec 19, 2007 | Dec 19, 2007 | Premier Natural Resources, LLC | Jackson | Neibuhr, A.L. #10 | 6,416 | 23932298 |
| 559189 | Mar 25, 2005 | Mar 25, 2005 | Union Oil Company of California | Van Zandt | Shivers, J. R. 12 #4 | 2,942 | 46700548 |
| 448468 | Jun 24, 1996 | Jun 24, 1996 | Union Oil Company of California | Jackson | Niebuhr, A. L. #10 | 6,416 | 23932298 |
| 443732 | Feb 9, 1996 | Feb 9, 1996 | Union Oil Company of California | Jackson | Niebuhr, A. L. #10 | 6,416 | 23932298 |
| 443732 | Feb 9, 1996 | Feb 9, 1996 | Union Oil Company of California | Jackson | Niebuhr, A. L. #10 | 6,416 | 23932298 |
| 426632 | Sep 7, 1994 | Sep 7, 1994 | Union Oil Company of California | Jackson | Niebuhr, A.L. #10 | 6,416 | 23932298 |
| 377550 | Sep 6, 1990 | Sep 6, 1990 | Union Expl. Partners, Ltd. | Jackson | Neibuhr, A. L. #11 | 6,420 | 23932497 |
| 377550 | Sep 6, 1990 | Sep 6, 1990 | Union Expl. Partners, Ltd. | Jackson | Neibuhr, A. L. #11 | 6,420 | 23932497 |
| 377235 | Aug 28, 1990 | Aug 28, 1990 | Union Expl. Partners, Ltd. | Van Zandt | Thompson, J. T. 49 #1 | 2,994 | 46700828 |
| 377234 | Aug 28, 1990 | Aug 28, 1990 | Union Expl. Partners, Ltd. | Van Zandt | Howell, D. R. 45 #6 | 2,970 | 46700878 |
| 377233 | Aug 28, 1990 | Aug 28, 1990 | Union Expl. Partners, Ltd. | Van Zandt | Howell, D. R. 45 #4 | 2,950 | 46701255 |
| 375872 | Jul 24, 1990 | Jul 24, 1990 | Union Expl. Partners, Ltd. | Van Zandt | Jarman, W. T. 37 #10 | 2,919 | 46700222 |
| 375653 | Jul 19, 1990 | Jul 19, 1990 | Union Expl. Partners, Ltd. | Jackson | Niebuhr, A. L. #11 | 6,420 | 23932497 |
| 374137 | Jun 22, 1990 | Jun 22, 1990 | Union Expl. Partners, Ltd. | Van Zandt | York, Ella 13 #11 | 3,250 | 46730796 |
| 374571 | Jun 15, 1990 | Jun 15, 1990 | Union Expl. Partners, Ltd. | Henderson | Cresslenn Ranch #2 | 13,850 | 21330666 |
About this data
Registration from the RRC P-5 organization report, refreshed weekly. Permits from the OGA049M master and daily daf420 files; wells of record from the EWA wellbore schedule; production from PDQ lease reports at the last vintage; disposal from UIC permits and H-10 reports. Summary figures are rebuilt nightly.
Developers: this page as JSON is GET /v1/data/operators/tx/876352, documented in the API reference.