WELL · 42-311-33686 · DISTRICT 1
Herrera Gregorio #8
McMullen County · San Miguel Creek (C-25 Seg G) field · Vertical
Herrera Gregorio #8 (API 42-311-33686) is a well in Mcmullen County operated by Century Resources Inc., completed May 15, 2003.
The RRC has issued one drilling permit, issued March 10, 2003, permitted to 6,100 ft.
Completion filings report 5 formation tops, including Queen City, Carrizo, Wilcox, San Miguel.
Its 2 leases have reported 71.3K barrels of oil since May 2003, last reporting in July 2026. The leases carry 7 wells, so these are lease totals, not this well alone.
Operator of record
Houston, TX · P-5 Y, filed Jun 5, 2009 · 86 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Century Resources Inc. |
| Production reports | Atlas Operating LLCthrough Mar 2026 |
| Latest permit | Century Resources, Inc.Mar 10, 2003 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 6,100
- total depth, ft
- 1
- permits on file
- Mar 10, 2003
- last permit issued
- May 15, 2003
- completed
- 71.3K
- cumulative oil, bbl
- 0
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · May 2003 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- May 15, 2003
- 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 2 leases this well is completed on; they carry 7 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Herrera, Gregorio O-1-14690 | San Miguel Creek (Wilcox Cons.) | Atlas Operating LLC | 6 | 65.9K | 0 | Feb 2006 – Jul 2026 |
| Herrera, Gregorio O-1-14438 | San Miguel Creek (C-25 Seg G) | Century Resources, Inc. | 1 | 5.4K | 0 | May 2003 – Aug 2006 |
Oil, barrels lease total
Last 12 months 860 · prior 12 776(+11%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Century Resources, Inc.May 2003 → May 2009
- 2Ncey Holdings, LLCJun 2009 → Jul 2010
- 3Wynn-Crosby Operating, Ltd.Aug 2010 → Aug 2016
- 4Eagle Oil & Gas Co.Sep 2016 → Mar 2021
- 5Atlas Operating LLCApr 2021 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 529422-99 | Drill | Century Resources, Inc. | Mar 10, 2003 | Mar 10, 2003 | Mar 11, 2003 | 6,100 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-14438 | — | — | — | — |
| — | — O-1-14690 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 280 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Queen City | 1,518 | -1,238 |
| Carrizo | 1,780 | -1,500 |
| WilcoxWILCOX W-1 | 4,825 | -4,545 |
| San MiguelSAN MIGUEL CREEK (WILCOX CONS.) | 4,985 | -4,705 |
| Wolcox W-2WALES | 5,100 | -4,820 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,400 | 5,406 | Perforated |
| 5,409 | 5,415 | Perforated |
| 5,957 | 5,967 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 614 | 12.25 | 255 S |
| 5.5 | 6,054 | 7.875 | 465 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 | Mar 5, 2013 | Mar 20, 2012 | — |
| 00 | Aug 4, 2006 | Jun 10, 2003 | Yes |
| 00 | Jul 15, 2003 | Jun 10, 2003 | Yes |
| 00 | Jul 3, 2003 | — | — |
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 42-311-33686 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-311-33686 → 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/31133686, documented in the API reference.