WELL · 42-211-34621 · DISTRICT 10
Vollmert C #10
Hemphill County · Mendota NW. (Granite Wash) field · Vertical
Vollmert C #10 (API 42-211-34621) is a well in Hemphill County operated by Unit Petroleum Company, completed October 19, 2009.
The RRC has issued 2 drilling permits between 2009 and 2017, permitted to 11,300 ft.
Completion filings report 7 formation tops, including Brown Dolomite, Douglas, Kansas City, Marmaton.
Its 2 leases have reported 16.6K barrels of oil and 176K mcf of gas since October 2009, last reporting in July 2026. The leases carry 4 wells, so these are lease totals, not this well alone.
Operator of record
Tulsa, OK · P-5 Y, filed Dec 4, 2025 · 1,100 permits on file · (918) 493-7700
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Unit Petroleum Company |
| Production reports | Unit Petroleum Companythrough Apr 2026 |
| Latest permit | Unit Petroleum CompanyJun 5, 2017 |
- 11,300
- total depth, ft
- 2
- permits on file
- Jun 5, 2017
- last permit issued
- Oct 19, 2009
- completed
- 16.6K
- cumulative oil, bbl
- 176K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 2009 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Oct 19, 2009
- Shut in
- —
- Plugged
- —
Surface location
35.859401, -100.530923
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Hemphill County.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH APR 2026
Texas reports oil by lease, not by well. These are the 2 leases this well is completed on; they carry 4 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Vollmert 'C' O-14-9493 | Canadian, SE (Douglas) | Unit Petroleum Company | 3 | 16.6K | 114K | Sep 2016 – Jul 2026 |
| Vollmert "C" G-14-254699 | Mendota, NW. (Granite Wash) | Unit Petroleum Company | 1 | 0 | 61.3K | Oct 2009 – Feb 2018 |
Gas, mcf lease total
Last 12 months 11,938 · prior 12 19,717(-39%)
Oil, barrels lease total
Last 12 months 1,375 · prior 12 2,363(-42%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Unit Petroleum CompanyOct 2009 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 827208-99 | Recompletion | Unit Petroleum Company | May 26, 2017 | Jun 5, 2017 | — | 7,320 |
| 682587-99 | Drill | Unit Petroleum Company | Jun 29, 2009 | Jul 1, 2009 | Jul 19, 2009 | 11,300 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-14-254699 | — | — | — | — |
| — | — O-14-9493 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,629 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Brown Dolomite | 3,980 | -1,351 |
| Douglas | 6,916 | -4,287 |
| Kansas City | 8,112 | -5,483 |
| Marmaton | 9,050 | -6,421 |
| Granite Wash | 9,520 | -6,891 |
| Novi | 10,810 | -8,181 |
| 13 Finger | 10,890 | -8,261 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,304 | 7,316 | Perforated |
| 9,930 | 9,990 | Perforated |
| 10,054 | 10,099 | Perforated |
| 10,158 | 10,694 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 2,814 | 12.25 | 990 S |
| 5.5 | 10,960 | 8.75 | 375 S |
Completion filings
W-2 and G-1 reports on record in the RRC wellbore file, newest first. The suffix identifies the wellbore or completion event. About these reports →
| Suffix | Filed | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Nov 1, 2017 | Oct 3, 2017 | — |
| 00 | Apr 14, 2010 | Jan 21, 2010 | Yes |
| 00 | Feb 24, 2010 | — | — |
The source documents
Petrora holds the structured record. The scanned filings live at the RRC; these links open its search already filled in for this API.
- Wellbore filings for 42-211-34621 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-211-34621 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward). then paste it into their search.
Nearby wells and their tops
NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM
Draw a cross-section
This well's tops beside its 5 nearest neighbours, subsea-aligned so they line up regardless of surface terrain.
Isaacs E42-211-34295
0.7 KM · Unit Petroleum Company · Section with this well →
| Brown Dolomite | 3,890 | -1,341 |
| Douglas | 6,828 | -4,279 |
| KC | 8,021 | -5,472 |
| Kansas City | 8,021 | -5,472 |
| Marmaton | 8,942 | -6,393 |
| Granite Wash | 9,413 | -6,864 |
| Novi | 10,767 | -8,218 |
| 13 Finger | 10,862 | -8,313 |
9 TOPS · FIRST 8
Vollmert 'C'42-211-34301
0.7 KM · Unit Petroleum Company · Section with this well →
| Brown Dolomite | 3,968 | -1,332 |
| Douglas | 6,878 | -4,242 |
| KC | 8,060 | -5,424 |
| Kansas City | 8,060 | -5,424 |
| Marmaton | 8,985 | -6,349 |
| Granite Wash | 9,450 | -6,814 |
| Novi | 10,712 | -8,076 |
| 13 Finger | 10,790 | -8,154 |
9 TOPS · FIRST 8
Vollmert "C"42-211-34298
1.2 KM · Unit Petroleum Company · Section with this well →
| Heebner | 6,917 | -4,241 |
| Douglas | 6,917 | -4,241 |
| Douglas | 6,917 | -4,241 |
| Granite Wash | 9,738 | -7,062 |
| Novi | 11,010 | -8,334 |
Isaacs C42-211-33714
1.9 KM · Unit Petroleum Company · Section with this well →
| Base Red Beds | 3,915 | -1,293 |
| Brown Dolomite | 3,915 | -1,293 |
| Red Beds | 3,915 | -1,293 |
| Douglas | 6,838 | -4,216 |
| Base Heebner | 6,838 | -4,216 |
| Heebner | 6,838 | -4,216 |
| Kansas City | 8,072 | -5,450 |
| Marmaton | 9,120 | -6,498 |
12 TOPS · FIRST 8
Vollmert, J. C.42-393-31941
2.2 KM · Unit Petroleum Company · Section with this well →
| Brown Dolomite | 3,932 | -1,323 |
| Douglas | 6,847 | -4,238 |
| Kansas City | 8,004 | -5,395 |
| Granite Wash | 9,346 | -6,737 |
| 13 Finger | 10,745 | -8,136 |
| Morrow | 10,823 | -8,214 |
Waterfield 'A'42-393-32180
4.2 KM · Unit Petroleum Company · Section with this well →
| Brown Dolomite | 4,119 | -1,316 |
| Douglas | 6,930 | -4,127 |
| Kansas City | 8,145 | -5,342 |
| Marmaton | 9,120 | -6,317 |
| Granite Wash | 9,535 | -6,732 |
| Novi Lime | 10,675 | -7,872 |
| 13 Finger | 10,755 | -7,952 |
Susan R. Kaufman42-393-30128
6.4 KM · Mmgl Txph, LLC · Section with this well →
| Brown Dolomite | 4,256 | -1,341 |
| Douglas | 7,126 | -4,211 |
| Tonkawa | 7,543 | -4,628 |
| Kansas City | 8,182 | -5,267 |
| Cherokee | 10,200 | -7,285 |
| Morrow | 10,930 | -8,015 |
| Morrow | 11,388 | -8,473 |
| Morrow | 12,195 | -9,280 |
Mahler -A-42-393-30882
6.5 KM · Texas Oil & Gas Corp. · Section with this well →
| Granite Wash | 9,500 | -6,691 |
| Morrow | 10,800 | -7,991 |
| Morrow | 12,100 | -9,291 |
About this data
Permits from the RRC OGA049M master and daily daf420 files; wellbore and operator of record from the EWA schedule, weekly; completions, formation tops, casing, and perforations from the dbf900 wellbore file; production from PDQ lease reports, which lag two to three months; injection from UIC permits, H-10 reports, and TexNet daily volumes; earthquakes from the TexNet catalog.
New to these records? How to read a well page · API numbers · completion reports and tops · why production is by lease
Developers: this page as JSON is GET /v1/data/wells/21134621, documented in the API reference.