WELL · 42-311-32602 · DISTRICT 1
Herrera Gregoria et AL #4
McMullen County · San Miguel Creek (W-4 Seg. AA) field · Vertical
Herrera Gregoria ET AL #4 (API 42-311-32602) is a well in Mcmullen County operated by Aop Operating Corporation, completed December 5, 1987.
The RRC has issued 2 drilling permits between 1987 and 1997, permitted to 6,200 ft.
Completion filings report one formation top, including Wilcox.
Its 4 leases have reported 211K barrels of oil and 42 mcf of gas since January 1993, last reporting in July 2026. The leases carry 12 wells, so these are lease totals, not this well alone.
Operator of record
Dallas, TX · P-5 Y, filed Mar 6, 1998 · 83 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Aop Operating Corporation |
| Production reports | Atlas Operating LLCthrough Mar 2026 |
| Latest permit | Aop Operating CorporationApr 16, 1997 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 6,200
- total depth, ft
- 2
- permits on file
- Apr 16, 1997
- last permit issued
- Dec 5, 1987
- completed
- 211K
- cumulative oil, bbl
- 42
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Dec 5, 1987
- 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 12 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Herrera, Gregorio et AL O-1-14708 | San Miguel Creek (Wilcox Cons.) | Atlas Operating LLC | 4 | 110K | 0 | Feb 2006 – Jul 2026 |
| Herrera, Gregoria et AL O-1-11994 | San Miguel Creek (W-3, Seg AA) | Century Resources, Inc. | 2 | 50.4K | 21 | Jan 1993 – Aug 2006 |
| Herrera, Gregorio et AL O-1-14050 | San Miguel Creek | Century Resources, Inc. | 5 | 25.9K | 0 | Jun 1996 – Aug 2006 |
| Herrera, Gregoria et AL O-1-11929 | San Miguel Creek (W-4, Seg. AA) | Aop Operating Corporation | 1 | 24.6K | 21 | Jan 1993 – Apr 1998 |
Oil, barrels lease total
Last 12 months 1,075 · prior 12 1,088(-1%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Aop Operating CorporationJan 1993 → Jan 1998
- 2Principal Oil Corp.Feb 1998 → Mar 1998
- 3Texona Petroleum CorporationApr 1998 → Feb 2001
- 4Toreador Exploration & Prod IncMar 2001 → May 2001
- 5Century Resources, Inc.Jun 2001 → May 2009
- 6Ncey Holdings, LLCJun 2009 → Jul 2010
- 7Wynn-Crosby Operating, Ltd.Aug 2010 → Aug 2016
- 8Eagle Oil & Gas Co.Sep 2016 → Mar 2021
- 9Atlas Operating LLCApr 2021 → Mar 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 461072-99 | Recompletion | Aop Operating Corporation | Apr 14, 1997 | Apr 16, 1997 | Jul 25, 1997 | 6,066 |
| 338029-99 | Drill | Aop Operating Corporation | Oct 28, 1987 | Oct 29, 1987 | — | 6,200 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-11929 | — | — | — | — |
| — | — O-1-11994 | — | — | — | — |
| — | — O-1-11994 | — | — | — | — |
| — | — O-1-14050 | — | — | — | — |
| — | — O-1-14050 | — | — | — | — |
| — | — O-1-14708 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 284 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Wilcox | 3,175 | -2,891 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,241 | 5,248 | Perforated |
| 5,309 | 5,311 | Perforated |
| 5,342 | 5,345 | Perforated |
| 5,353 | 5,355 | Perforated |
| 5,506 | 5,522 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 606 | 12.25 | 225 S |
| 7 | 5,650 | 8.75 | 800 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 | Aug 4, 2006 | Jan 16, 1998 | Yes |
| 00 | Apr 28, 1998 | Jan 16, 1998 | Yes |
| 00 | Apr 16, 1998 | Nov 12, 1996 | — |
| 00 | Dec 17, 1997 | — | — |
| 00 | Dec 4, 1996 | Nov 12, 1996 | — |
| 00 | Apr 6, 1988 | Mar 11, 1988 | Yes |
| 00 | Apr 1, 1988 | — | — |
| 00 | Dec 22, 1987 | Dec 10, 1987 | Yes |
| 00 | Dec 16, 1987 | — | — |
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 42-311-32602 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-311-32602 → 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/31132602, documented in the API reference.