Sierra Resources
Operator of record for 116 catalogued wells across 3 states. Every well below links to its full registry page.
Filed as: SIERRA RESOURCES INC · SIERRA RESOURCES LLC · Sierra Resources, Inc.
At a glance
Sierra Resources is the operator of record for 116 catalogued U.S. oil & gas wells in 3 states. 87 (75%) are active, 10 (9%) plugged & abandoned. Its largest concentration is in California, with 112 wells (97% of its portfolio).
Wells operated
116
Active
87
Plugged
10
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| California | 112 |
| Ohio | 3 |
| Oklahoma | 1 |
Well mix
- Oil wells
- 107
- Gas wells
- 3
- Shut-in
- 15
- Active share
- 75%
Is this your company?
Claim Sierra Resources to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Sierra Resources operate?
Sierra Resources's catalogued wells are spread across 3 states: California (112), Ohio (3) and Oklahoma (1). Its 112 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 Sierra Resources’s wells are active, plugged or orphaned?
75% of Sierra Resources's catalogued wells are active, 46 percentage points above the national share of 29%. 9% are plugged & abandoned, against 47% nationally. 15 wells (13%) are shut-in — unplugged but idle. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Sierra Resources operate?
By product class, 107 (92%) are oil wells and 3 (3%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Kleski 21-13-7 1h in Tuscarawas, OH at 13,770 ft. The wells listed below sit in Tuscarawas (OH), Columbiana (OH), Carroll (OH) and Santa Barbara (CA). State filings spell the name 3 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Sierra Resources
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Kleski 21-13-7 1h | 34-157-25501 | Other status | Oil | Tuscarawas, OH | Sierra Resources LLC | 13,770 ft |
| Kiko Unit 19-16-4 1h | 34-029-21742 | Other status | Oil | Columbiana, OH | Sierra Resources LLC | 12,616 ft |
| Leeper 5-14-7 1h | 34-019-22214 | Other status | Oil | Carroll, OH | Sierra Resources LLC | 12,411 ft |
| Barham 7 | 04-083-22484 | Active | Oil | Santa Barbara, CA | Sierra Resources, Inc. | — |
| Boyne 10 | 04-083-22785 | Active | Oil | Santa Barbara, CA | Sierra Resources, Inc. | — |
| Barham 1 | 04-083-00984 | Plugged & abandoned | Oil | Santa Barbara, CA | Sierra Resources, Inc. | — |
| Barham 11 | 04-083-22697 | Active | Oil | Santa Barbara, CA | Sierra Resources, Inc. | — |
| Soladino 8 | 04-083-00813 | Shut-in | Oil | Santa Barbara, CA | Sierra Resources, Inc. | — |
| Soladino 11 | 04-083-00816 | Active | Oil | Santa Barbara, CA | Sierra Resources, Inc. | — |
| Soladino 12 | 04-083-00817 | Active | Oil | Santa Barbara, CA | Sierra Resources, Inc. | — |
| Soladino 14 | 04-083-00818 | Active | Oil | Santa Barbara, CA | Sierra Resources, Inc. | — |
| Soladino 7 | 04-083-00812 | Shut-in | Oil | Santa Barbara, CA | Sierra Resources, Inc. | — |
Deepest first where depth is published. See all 116 wells →
Frequently asked questions
How many wells does Sierra Resources operate?
Sierra Resources is the operator of record for 116 catalogued oil & gas wells, with the largest concentration in California (112). Only wells in states WellCensus has ingested are counted.
How many of Sierra Resources's wells are still active?
87 of Sierra Resources's catalogued wells are active; 10 are plugged & abandoned.
In which states does Sierra Resources operate wells?
Sierra Resources is the operator of record for wells in California (112), Ohio (3) and Oklahoma (1).
Does Sierra Resources operate mostly oil or gas wells?
107 of Sierra Resources's catalogued wells are oil wells and 3 are gas wells; the rest are injection, service or unclassified wells.
What is Sierra Resources's deepest well?
Among wells with a published depth, Kleski 21-13-7 1h in Tuscarawas, OH is the deepest at 13,770 ft.
Where Sierra Resources'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, “Sierra Resources — well portfolio”, https://wellcensus.com/operators/sierra-resources-4301 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).