TEXAS · WELLS · ROBERTS COUNTY · VOLLMERT "C" LEASE · API 42-393-32156 · DISTRICT 08
Vollmert C #9
Roberts County · Mendota NW. (Granite Wash) field · Producing · Vertical
- Fields on the latest permit · any of 2
- Hemphill (Douglas) · Mendota, NW. (Granite Wash, SW.)
- Not one formation; the well must be completed in one of them, and no target formation is stated. The district's wildcat field is also on the permit.
Vollmert C #9 (API 42-393-32156) is a well in Roberts County operated by Unit Petroleum Company, completed October 18, 2008 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued August 9, 2008, permitted to 10,950 ft.
Completion filings report 7 formation tops, including Brown Dolomite, Douglas, Kansas City, Marmaton.
Its lease has reported 13.6K barrels of oil and 812K mcf of gas since October 2008, last reporting volume in April 2026.
Operator of record
- Based in
- Tulsa, OK
- P-5 status
- Active (A)
- P-5 last filed
- Jan 13, 2025
- Permits on file
- 1,100
- Phone
- (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 CompanyAug 9, 2008 |
- 10,950
- total depth, ft
- 1
- permits on file
- Aug 9, 2008
- last permit issued
- Oct 18, 2008
- completed
- 13.6K
- cumulative oil, bbl
- 812K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 2008 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 18, 2008
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
Surface location
No coordinates on the permit record yet. The RRC's GIS record usually lands within days of issuance; historical master-file permits never carry one.
Lease production
PDQ LEASE REPORTS · REPORTED THROUGH APR 2026
Texas reports oil by lease, not by well. These are the lease this well is completed on; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Vollmert "C" G-14-244267 | Mendota, NW. (Granite Wash) | Unit Petroleum Company | 1 | 13.6K | 812K | Oct 2008 – Apr 2026 |
Gas, mcf lease total
Last 12 months 7,410 · prior 12 7,962(-7%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Unit Petroleum CompanyOct 2008 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 667357-99 | Drill | Unit Petroleum Company | Jul 23, 2008 | Aug 9, 2008 | Aug 18, 2008 | 10,900 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Oct 18, 2008 | Vollmert C G-14-244267 | Mendota NW. (Granite Wash) | Unit Petroleum Company | Producing | 10,950 |
Formation tops
As filed on W-2/G-1. Subsea from 2,679 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Brown Dolomite | 3,995 | -1,316 |
| Douglas | 6,895 | -4,216 |
| Kansas City | 8,078 | -5,399 |
| Marmaton | 8,990 | -6,311 |
| Granite Wash | 9,460 | -6,781 |
| Novi Lime | 10,715 | -8,036 |
| 13 Finger | 10,790 | -8,111 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,895 | 9,927 | Perforated |
| 10,006 | 10,051 | Perforated |
| 10,134 | 10,153 | Perforated |
| 10,509 | 10,649 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 2,855 | 11.4 | 995 S |
| 5.5 | 10,921 | 8.75 | 325 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Feb 12, 2009 | Nov 26, 2008 | Yes |
| 00 | Jan 26, 2009 | — | — |
Well logs
2 logs loaded from the RRC's log index, the latest received Sep 27, 2011. Density, Neutron, Resistivity. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| NEUTRON/DENSITY POROSITYSpans Brown Dolomite, Douglas, Kansas City, Marmaton, Granite Wash, Novi Lime, 13 Finger | TIFF | 6,500 to 10,914 | Sep 27, 2011run Sep 5, 2008 | 6.94 |
| RESISTIVITYSpans Brown Dolomite, Douglas, Kansas City, Marmaton, Granite Wash, Novi Lime, 13 Finger | TIFF | 2,854 to 10,914 | Sep 27, 2011run Sep 5, 2008 | 8.25 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-393-32156 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-393-32156 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it.
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/39332156, documented in the API reference.