Union Oil Company Of California Wells and Activity Summary
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Total wells
Most recent drilling
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Industry news recent coverage mentioning Union Oil Co of Cal
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Apr 16, 2026Higher oil prices are not translating cleanly into a drilling response across U.S. shale, and company disclosures are starting to show why. The issue is not simply capital discipline. It is structural. A meaningful… Read full article on ShaleExperts →
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Apr 15, 2026In the span of fifteen months, three Japanese energy companies committed more than $10.3 billion to U.S. natural gas production assets — a buying spree that has transferred roughly 27% of Haynesville Shale output… Read full article on ShaleExperts →
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Apr 15, 2026The first quarter of 2026 has officially defined the "Barbell Era" of American oil and gas. While the total number of deals plummeted by 46% YoY (dropping to just 7 major transactions), the total deal value skyrocketed… Read full article on ShaleExperts →
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Apr 11, 2026Western Canadian M&A activity in Q1 2026 was characterized by a 87% decrease in total deal value compared to Q1 2025, totaling $0.8 billion C$ . However, transaction volume remained resilient with a 150% increase in… Read full article on ShaleExperts →
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Mar 23, 2026Energy Secretary Chris Wright stood in front of the largest gathering of oil executives in the world this morning and delivered a message that was equal parts market economics and wartime urgency: the price spike is… Read full article on ShaleExperts →
⚑ Same company across states: Union Oil Co of Cal
Curated alternate names for Union Oil Co of Cal (from ShaleExperts company records):
- UNION OIL CO OF CAL, UNION OIL COMPANY OF CALIFORNIA
Union Oil Company Of California has 199 wells on file in Montana.
Active in 10 counties — concentrated in Glacier, Toole, and Teton.
Most recent well: CBAU 5-23 (Glacier county) — last updated July 1992.
Union Oil Company Of California county coverage
Counties where Union Oil Company Of California has wells. Click any county for its local activity.
Recent wells
| Well Name | County | Last activity | Updates | API |
|---|---|---|---|---|
| CBAU 5-23 | Glacier | 1992-07-01 | 25035218670000 | |
| Tribal 44-K28 | Glacier | 1990-12-23 | 25035218380000 | |
| SCCBSU 19-A-10 | Glacier | 1990-11-30 | 25035218410000 | |
| Federal 1-B30 | Lewis and Clark | 1989-11-27 | 25049210130000 | |
| SCCBSU 38-9 | Glacier | 1987-11-04 | 25035217670000 | |
| USA 1-P6 | Teton | 1984-08-05 | 25099212340000 | |
| Union 3-C36 | Glacier | 1984-06-26 | 25035216340000 | |
| Union 4-J36 | Glacier | 1984-06-05 | 25035216350000 | |
| Tribal 355 53-14 | Glacier | 1983-12-22 | 25035216560000 | |
| CLARK 1-M4 | Roosevelt | 1983-03-04 | 25085214080000 |
Counties Worked by total wells in Montana
Counties: Glacier, Toole, Teton, Liberty, Carter, Roosevelt, Big Horn, Carbon, Hill, Phillips.
Top Oil & Gas Fields worked by Union Oil Company Of California by total wells
Fields: Cut Bank, Reagan, Border, Poplar, Northwest, Red Creek, Two Medicine Creek, Big Rock, Wildcat Teton, Cadmus, Chinook, East.