Olson & Gregg
Operator of record for 12 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Olson & Gregg is the operator of record for 12 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 12 (100%) are plugged & abandoned. Its largest concentration is in California, with 12 wells (100% of its portfolio).
Wells operated
12
Active
0
Plugged
12
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| California | 12 |
Well mix
- Oil wells
- 11
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
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Claim your operator profileWhere does Olson & Gregg operate?
Olson & Gregg's catalogued wells are spread across 1 state: California (12). Its 12 California wells are 0.0% of the 242,471 catalogued in that state — its largest share of any state. Counts cover only states whose registries WellCensus has ingested with operator names; wells in Nebraska and Texas (location indexes) and in states without a registry ingest are not yet attributed to any operator.
How many of Olson & Gregg’s wells are active, plugged or orphaned?
0% of Olson & Gregg's catalogued wells are active, 29 percentage points below the national share of 29%. 100% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Olson & Gregg operate?
By product class, 11 (92%) are oil wells and 0 (0%) gas wells; nationally the shares are 43% and 17%. The wells listed below sit in Ventura (CA), Los Angeles (CA) and Tulare (CA).
Notable wells operated by Olson & Gregg
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Elkins 2-2 | 04-111-00335 | Plugged & abandoned | Oil | Ventura, CA | Olson & Gregg, Inc. | — |
| Pellissier 1 | 04-037-06420 | Plugged & abandoned | Oil | Los Angeles, CA | Olson & Gregg, Inc. | — |
| Pellissier 2 | 04-037-06421 | Plugged & abandoned | Oil | Los Angeles, CA | Olson & Gregg, Inc. | — |
| Pellissier 3 | 04-037-06422 | Plugged & abandoned | Oil | Los Angeles, CA | Olson & Gregg, Inc. | — |
| Pellissier 4 | 04-037-06423 | Plugged & abandoned | Oil | Los Angeles, CA | Olson & Gregg, Inc. | — |
| Pellissier 5 | 04-037-06424 | Plugged & abandoned | Oil | Los Angeles, CA | Olson & Gregg, Inc. | — |
| Micallef 1 | 04-107-00014 | Plugged & abandoned | Oil | Tulare, CA | Olson & Gregg, Inc. | — |
| Gregg 2 | 04-037-00134 | Plugged & abandoned | Injection | Los Angeles, CA | Olson & Gregg, Inc. | — |
| Kline 2 | 04-037-06493 | Plugged & abandoned | Oil | Los Angeles, CA | Olson & Gregg, Inc. | — |
| Rideout-Hamburg 2 | 04-037-18440 | Plugged & abandoned | Oil | Los Angeles, CA | Olson & Gregg, Inc. | — |
| Whitley 6 | 04-037-18444 | Plugged & abandoned | Oil | Los Angeles, CA | Olson & Gregg, Inc. | — |
| Micallef 2 | 04-107-00015 | Plugged & abandoned | Oil | Tulare, CA | Olson & Gregg, Inc. | — |
Deepest first where depth is published. See all 12 wells →
Frequently asked questions
How many wells does Olson & Gregg operate?
Olson & Gregg is the operator of record for 12 catalogued oil & gas wells, with the largest concentration in California (12). Only wells in states WellCensus has ingested are counted.
How many of Olson & Gregg's wells are still active?
0 of Olson & Gregg's catalogued wells are active; 12 are plugged & abandoned.
In which states does Olson & Gregg operate wells?
Olson & Gregg is the operator of record for wells in California (12).
Does Olson & Gregg operate mostly oil or gas wells?
11 of Olson & Gregg's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
Where Olson & Gregg's wells are
About this data
Source: State oil & gas regulator registries (operator of record as filed, exact-normalized across states) plus the USGS United States Documented Orphaned Well Database (2026), as published October 10, 2026 — WellCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: WellCensus, “Olson & Gregg — well portfolio”, https://wellcensus.com/operators/olson-gregg-13437 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).