WELL · 42-451-31957 · DISTRICT 7
Hercules #1
Tom Green County · Kennemer W. (Ellenburger) field · Vertical
Hercules #1 (API 42-451-31957) is a well in Tom Green County operated by R K Petroleum Corp., completed June 30, 1989.
The RRC has issued 2 drilling permits (amended twice) between 1989 and 1990, permitted to 8,000 ft.
Completion filings report 8 formation tops, including San Angelo, B/Permo-Penn Lime, Homecreek Lime (T/Canyon), T/Canyon Sand (S).
Its 3 leases have reported 1.18K barrels of oil and 549K mcf of gas since January 1993, last reporting in July 2026. The leases carry 2 wells, so these are lease totals, not this well alone.
Operator of record
- Based in
- Midland, TX
- P-5 status
- Active (A)
- P-5 last filed
- Jan 8, 2026
- Permits on file
- 530
- Phone
- (432) 683-4319
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | R K Petroleum Corp. |
| Production reports | Cobalt Operating, LLCthrough Nov 2014 |
| Latest permit | R K Petroleum CorporationJan 26, 1990 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,000
- total depth, ft
- 4
- permits on file
- Jan 26, 1990
- last permit issued
- Jun 30, 1989
- completed
- 1.18K
- cumulative oil, bbl
- 549K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jun 30, 1989
- 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 3 leases this well is completed on; they carry 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Hercules O-9-18492 | Hercules (Canyon) | Los Hijos de Sanchez J LLC | 1 | 1.18K | 0 | May 2013 – Jul 2026 |
| Hercules G-9-134246 | Hercules (Canyon) | Cobalt Operating, LLC | 1 | 0 | 549K | Jan 1993 – Oct 2014 |
| — O-9-12682 | — | — | 0 | 0 | 0 | — |
No volumes reported on these leases in the last three years.
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1R K Petroleum Corp.Jan 1993 → Sep 2003
- 2Blue Ridge Resources, LLCFeb 2005 → Sep 2011
- 3Cobalt Operating, LLCOct 2011 → Nov 2014
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 369079-98 | Recompletion | R K Petroleum Corporation | May 4, 1990 | Jan 26, 1990 | — | 6,880 |
| 369079-99 | Recompletion | R K Petroleum Corporation | Jan 25, 1990 | Jan 26, 1990 | — | 6,265 |
| 360092-98 | Drill | R K Petroleum Corporation | Jul 10, 1989 | Jun 6, 1989 | — | 7,000 |
| 360092-99 | Drill | R K Petroleum Corporation | Jun 6, 1989 | Jun 6, 1989 | — | 8,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-9-134246 | — | — | — | — |
| — | — O-9-12682 | — | — | — | — |
| — | — O-9-18492 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,061 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| San Angelo | 1,080 | 981 |
| B/Permo-Penn Lime | 4,456 | -2,395 |
| Homecreek Lime (T/Canyon) | 5,610 | -3,549 |
| T/Canyon Sand (S) | 6,005 | -3,944 |
| CanyonLOWER CANYON SAND | 6,260 | -4,199 |
| Palo Pinto | 6,455 | -4,394 |
| CanyonCANYON MARKER | 6,496 | -4,435 |
| StrawnSTRAWN SAND | 6,640 | -4,579 |
| StrawnSTRAWN LIME | 6,780 | -4,719 |
| Ellenburger | 6,983 | -4,922 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,005 | 6,015 | Perforated |
| 6,261 | 6,265 | Perforated |
| 6,967 | 7,000 | Open hole |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 370 | 11 | 175 S |
| 5.5 | 6,967 | 7.875 | 575 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 | Jul 7, 2014 | Mar 25, 2014 | Yes |
| 00 | Jul 17, 1990 | Feb 8, 1990 | Yes |
| 00 | May 12, 1990 | — | Yes |
| 00 | Aug 2, 1989 | Jul 5, 1989 | Yes |
| 00 | Jul 22, 1989 | — | — |
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 42-451-31957 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-451-31957 → 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/45131957, documented in the API reference.