328 wells across 136 recorded operators, with 16 drilling permits filed in the 24-month window at summary refresh.
Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-10-03.
Quick answer: The Northern Coast Range Prov formation in California has 328 wells on record across 136 recorded operators, with 16 drilling permits filed in the 24-month window at source refresh. Its operators with the most wells on record are Chevron, Patriot Resources, Sargent Oil Company, H W Covert and E & B Natural Resources Management. Source: Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-10-03.
The operators with the most well counts targeting the Northern Coast Range Prov formation in California:
| # | Operator | Wells in Northern Coast Range Prov |
|---|---|---|
| 1 | Chevron | 35 |
| 2 | Patriot Resources | 21 |
| 3 | Sargent Oil Company | 20 |
| 4 | H W Covert | 14 |
| 5 | E & B Natural Resources Management | 12 |
| 6 | Petaluma Oil & Gas Development Company | 11 |
| 7 | Hershey Oil | 9 |
| 8 | Mobil Oil | 8 |
| 9 | Griffiths Oil Company | 7 |
| 10 | E C Brown Operator | 7 |
The California counties with the most Northern Coast Range Prov activity:
Santa Clara, Alameda, Sonoma, Napa, Mendocino
The Northern Coast Range Prov is not among the California formations tracked separately in the yearly permit mix, so only statewide permit counts are shown.
| Year | State permits | This formation | Share | Median lateral |
|---|---|---|---|---|
| 2026 | 2,510 | — | — | — |
| 2025 | 5,530 | — | — | — |
| 2024 | 5,346 | — | — | — |
| 2023 | 940 | — | — | — |
| 2022 | 757 | — | — | — |
| 2021 | 130 | — | — | — |
| 2020 | 1,825 | — | — | — |
| 2019 | 2,587 | — | — | — |
Share of each year’s California drilling permits by target formation, for the formations with the most permits.
| Year | Monterey-Temblor | San Joaquin Basin | Monterey | Coastal Basins | Sacramento Basin | Los Angeles Basin |
|---|---|---|---|---|---|---|
| 2026 | 31% | 39.9% | 11.3% | 8.5% | 4.8% | 2.2% |
| 2025 | 49% | 33.7% | 8.8% | 2.4% | 2.9% | 1.3% |
| 2024 | 50.9% | 36.8% | 5.2% | 0.8% | 2.4% | 1.8% |
| 2023 | 33.7% | 55.1% | 5% | 0.3% | 1.8% | 2.8% |
| 2022 | 4.4% | 81.5% | 2% | 3.8% | — | 3.8% |
| 2021 | 50.8% | 30.8% | 16.2% | 2.3% | — | — |
| 2020 | 71.1% | 24.9% | 1.9% | 1.4% | 0.2% | 0.3% |
| 2019 | 40% | 40% | 15.2% | 2.2% | 0.3% | 0.3% |
Buckhead Energy computes every figure on this page from grouped records in public oil and gas data. The page shows counts, sums, percentiles and indexes only; it does not list individual wells, leases or permits.
Counts under 3 wells and percentiles under 5 wells are withheld; totals are floors.
Share is the formation’s permits as a percent of the state’s permits that year. Median lateral length is published only when at least 5 permits stand behind it.
Last computed: 2026-10-03. These figures are informational only and are not a valuation of any mineral or royalty interest.
The Northern Coast Range Prov is a formation/play group recorded in California, with 328 wells on file across 136 distinct operators of record. Operators have filed 16 drilling permits targeting the Northern Coast Range Prov in the 24-month window at summary refresh. These are stored records, not a live measure of drilling.
Recorded formation activity provides regional context. It does not establish ownership, future production, royalty payments or a value for an individual tract. Consult qualified professionals about your specific interest.
328 wells target the Northern Coast Range Prov in California, worked by 136 recorded operators, per Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-10-03.
The Northern Coast Range Prov operators with the most wells on record in California are Chevron, Patriot Resources, Sargent Oil Company, H W Covert and E & B Natural Resources Management. The full ranking is in the table on this page. Formation summary date: 2026-10-03.
Operators filed 16 drilling permits targeting the Northern Coast Range Prov in the 24-month window at source refresh, per Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-10-03.
Operators filed 16 new drilling permits targeting the Northern Coast Range Prov in California in the 24-month window at source refresh. New permits and spuds record reported activity stages; they do not establish ongoing drilling, per Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-10-03.
Northern Coast Range Prov activity in California includes 328 wells on record and 136 recorded operators, with 16 drilling permits filed in the 24-month window at source refresh — from Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-10-03.
The primary counties recorded for Northern Coast Range Prov in California are Santa Clara, Alameda, Sonoma, Napa, Mendocino. Formation summary date: 2026-10-03.
Value depends on your net mineral acres or royalty decimal, the operator, the remaining drilling locations, and current oil and gas prices. This page is informational only, not a valuation. Formation summary date: 2026-10-03.
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Formation: Northern Coast Range Prov
State: California
Total wells: 328
Recorded operators: 136
Permits 24mo: 16
Summary date: 2026-10-03
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