Markwest Resources
Operator of record for 10 catalogued wells across 2 states. Every well below links to its full registry page.
At a glance
Markwest Resources is the operator of record for 10 catalogued U.S. oil & gas wells in 2 states. None is listed as active, 4 (40%) are plugged & abandoned. Its largest concentration is in Colorado, with 8 wells (80% of its portfolio).
Wells operated
10
Active
0
Plugged
4
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Colorado | 8 |
| New Mexico | 2 |
Well mix
- Oil wells
- 0
- Gas wells
- 4
- Shut-in
- 0
- Active share
- 0%
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Claim your operator profileWhere does Markwest Resources operate?
Markwest Resources's catalogued wells are spread across 2 states: Colorado (8) and New Mexico (2). Its 8 Colorado wells are 0.0% of the 124,327 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 Markwest Resources’s wells are active, plugged or orphaned?
0% of Markwest Resources's catalogued wells are active, 29 percentage points below the national share of 29%. 40% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Markwest Resources operate?
By product class, 0 (0%) are oil wells and 4 (40%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is 1 Jessie Hahn in La Plata, CO at 14,503 ft. The wells listed below sit in La Plata (CO) and San Juan (NM).
Notable wells operated by Markwest Resources
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| 1 Jessie Hahn | 05-067-06114 | Plugged & abandoned | Other type | La Plata, CO | Markwest Resources Inc | 14,503 ft |
| 1 Ute A | 05-067-05221 | Plugged & abandoned | Gas | La Plata, CO | Markwest Resources Inc | 7,838 ft |
| 1 Tiffany | 05-067-05167 | Plugged & abandoned | Gas | La Plata, CO | Markwest Resources Inc | 7,670 ft |
| Fullerton Federal #004 | 30-045-06555 | Plugged & abandoned | Gas | San Juan, NM | Markwest Resources Inc | 1,995 ft |
| Scott Federal 27 11 23 #233 | 30-045-31194 | Other status | Gas | San Juan, NM | Markwest Resources Inc | 0 ft |
| 8-1 Engler 32-6 | 05-067-08103 | Other status | Other type | La Plata, CO | Markwest Resources Inc | — |
| 1-2 Southern Ute | 05-067-08053 | Other status | Other type | La Plata, CO | Markwest Resources Inc | — |
| 26-2 R G 33-7 | 05-067-08110 | Other status | Other type | La Plata, CO | Markwest Resources Inc | — |
| 21-27 Lamke | 05-067-07763 | Other status | Other type | La Plata, CO | Markwest Resources Inc | — |
| 44-14 Dickens | 05-067-07688 | Other status | Other type | La Plata, CO | Markwest Resources Inc | — |
Deepest first where depth is published. See all 10 wells →
Frequently asked questions
How many wells does Markwest Resources operate?
Markwest Resources is the operator of record for 10 catalogued oil & gas wells, with the largest concentration in Colorado (8). Only wells in states WellCensus has ingested are counted.
How many of Markwest Resources's wells are still active?
0 of Markwest Resources's catalogued wells are active; 4 are plugged & abandoned.
In which states does Markwest Resources operate wells?
Markwest Resources is the operator of record for wells in Colorado (8) and New Mexico (2).
Does Markwest Resources operate mostly oil or gas wells?
0 of Markwest Resources's catalogued wells are oil wells and 4 are gas wells; the rest are injection, service or unclassified wells.
What is Markwest Resources's deepest well?
Among wells with a published depth, 1 Jessie Hahn in La Plata, CO is the deepest at 14,503 ft.
Where Markwest 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, “Markwest Resources — well portfolio”, https://wellcensus.com/operators/markwest-resources-3223 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).