WELL · 42-181-31328 · DISTRICT 9
Big Mineral Creek (U V) Unit #521
Grayson County · Big Mineral Creek (UV Sand) field · Directional
Big Mineral Creek (U V) Unit #521 (API 42-181-31328) is a permitted well in Grayson County filed by Venoco, Inc.; no completion report is on file yet.
The RRC has issued one drilling permit, issued December 30, 1997, permitted to 8,500 ft.
It was permitted by Venoco, Inc. and has since transferred to Blackwell Bmc LP on the wellbore schedule.
Its 4 leases have reported 3.14M barrels of oil and 3.34M mcf of gas since December 1998, last reporting in July 2026. The leases carry 215 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Venoco, Inc.; the EWA schedule now lists a different operator.
Dallas, TX · P-5 Y, filed Dec 7, 2007 · 10 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Blackwell BMC LP |
| Production reports | Flintlock Exploration, LLCthrough Apr 2026 |
| Latest permit | Venoco, Inc.Dec 30, 1997 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,500
- total depth, ft
- 1
- permits on file
- Dec 30, 1997
- last permit issued
- —
- completed
- 3.14M
- cumulative oil, bbl
- 3.34M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Dec 1998 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- —
- Shut in
- —
- Plugged
- —
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 4 leases this well is completed on; they carry 215 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Super Unit O-13-29589 | Big Mineral Creek (Consolidated) | Flintlock Exploration, LLC | 162 | 2.46M | 1.33M | Dec 1998 – Jul 2026 |
| Big Mineral Creek (UV Sand) Unit O-13-31699 | Big Mineral Creek (UV Sand Unit) | Flintlock Exploration, LLC | 31 | 548K | 1.7M | Sep 2010 – Jul 2026 |
| Big Mineral Creek (UV Sand) Unit O-13-30897 | Big Mineral Creek (Consolidated) | Blackwell BMC, LLC | 21 | 127K | 315K | Jan 2008 – Jan 2022 |
| Big Mineral Creek (U V) Unit O-13-29607 | Big Mineral Creek (UV Sand) | Blackwell BMC, LP | 1 | 0 | 0 | Jan 1999 – Apr 2006 |
Oil, barrels lease total
Last 12 months 58,588 · prior 12 70,053(-16%)
Gas, mcf lease total
Last 12 months 86,566 · prior 12 107,828(-20%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Venoco, Inc.Dec 1998 → Mar 2005
- 2Blackwell BMC, LPApr 2005 → Mar 2007
- 3Blackwell BMC, LLCApr 2007 → May 2011
- 4Jetta Operating Company, Inc.Jun 2011 → Aug 2025
- 5Flintlock Exploration, LLCSep 2025 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 471340-99 | Drill | Venoco, Inc. | Dec 17, 1997 | Dec 30, 1997 | Oct 4, 2005 | 8,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-13-29589 | — | — | — | — |
| — | — O-13-29607 | — | — | — | — |
| — | — O-13-30897 | — | — | — | — |
| — | — O-13-31699 | — | — | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,223 | 8,406 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,574 | 12.25 | 355 S |
| 9.625 | 1,575 | 12.25 | 355 S |
| 5.5 | 8,575 | 7.875 | 2,000 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 23, 2010 | Feb 22, 2006 | Yes |
| 00 | Jan 31, 2008 | Feb 22, 2006 | Yes |
| 00 | Aug 9, 2006 | Feb 22, 2006 | Yes |
| 00 | Apr 7, 2006 | — | — |
| 00 | Feb 3, 1999 | Jan 25, 1999 | — |
| 00 | Jan 29, 1999 | — | — |
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 42-181-31328 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-181-31328 → 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.
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/18131328, documented in the API reference.