WELL · 42-371-30623 · DISTRICT 8
Arco #4
Pecos County · Huber (Detrital) field · Vertical
Arco #4 (API 42-371-30623) is a permitted well in Pecos County filed by Mexco Energy Corporation; no completion report is on file yet.
The RRC has issued 2 drilling permits between 1984 and 2001, permitted to 5,611 ft.
It was permitted by Mexco Energy Corporation and has since transferred to Darkens Oil & Gas Inc. on the wellbore schedule.
Completion filings report 8 formation tops, including Yates, San Andres, Tubb, W-A-Marker.
Its 2 leases have reported 63.7K barrels of oil and 274K mcf of gas since January 1993, last reporting in July 2026. The leases carry 6 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Mexco Energy Corporation; the EWA schedule now lists a different operator.
Mc Camey, TX · P-5 Y, filed Mar 4, 2026 · (432) 652-3337
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Darkens Oil & Gas Inc. |
| Production reports | Darkens Oil & Gas Inc.through Apr 2026 |
| Latest permit | Mexco Energy CorporationApr 4, 2001 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,611
- total depth, ft
- 2
- permits on file
- Apr 4, 2001
- last permit issued
- —
- completed
- 63.7K
- cumulative oil, bbl
- 274K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 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 2 leases this well is completed on; they carry 6 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Arco O-10-28807 | EL Cinco (Wichita Albany, Mid.) | Darkens Oil & Gas Inc. | 4 | 32.9K | 197K | Jan 1993 – Jul 2026 |
| B P Arco O-10-36838 | EL Cinco (Leonard, Lower) | Darkens Oil & Gas Inc. | 2 | 30.8K | 77.8K | Dec 2001 – Jul 2026 |
Oil, barrels lease total
Last 12 months 884 · prior 12 1,568(-44%)
Gas, mcf lease total
Last 12 months 433 · prior 12 2,199(-80%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Huber, J. M., CorporationJan 1993 → Dec 1996
- 2Coda Energy, Inc.Jan 1997 → Aug 1998
- 3Belco Energy Corp.Sep 1998 → Sep 2000
- 4Mexco Energy CorporationOct 2000 → Oct 2016
- 5Darkens Oil & Gas Inc.Nov 2016 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 506839-99 | Recompletion | Mexco Energy Corporation | Mar 22, 2001 | Apr 4, 2001 | Dec 12, 2001 | 5,611 |
| 227446-99 | Recompletion | Huber, J. M., Corporation | Jan 23, 1984 | Jan 25, 1984 | — | 5,611 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-28807 | — | — | — | — |
| — | — O-10-28807 | — | — | — | — |
| — | — O-10-36838 | — | — | — | — |
| — | — O-10-36838 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,297 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 880 | 1,417 |
| San Andres | 1,818 | 479 |
| Tubb | 2,948 | -651 |
| W-A-Marker | 4,292 | -1,995 |
| Wichita-AlbanyWICHITA ALBANY MARKER | 4,292 | -1,995 |
| L. Leonard | 4,725 | -2,428 |
| Top Detrital | 4,910 | -2,613 |
| Detrital, Huber | 5,352 | -3,055 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,053 | 4,164 | Perforated |
| 4,432 | 4,554 | Perforated |
| 4,725 | 4,732 | Perforated |
| 4,846 | 4,854 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,018 | 11 | 450 S |
| 5.5 | 5,571 | 7.875 | 1,000 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 | Jun 20, 2002 | Feb 20, 2002 | — |
| 00 | May 16, 2002 | Mar 12, 1984 | — |
| 00 | May 16, 2002 | — | — |
| 00 | Apr 25, 1984 | Mar 12, 1984 | — |
| 00 | Apr 11, 1984 | Mar 12, 1984 | — |
| 00 | Jan 12, 1984 | Feb 10, 1972 | — |
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 42-371-30623 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-371-30623 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward) and the University Lands library. 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/37130623, documented in the API reference.