WELL · 42-505-31934 · DISTRICT 4
Arco-Marshall #7
Zapata County · Las Ovejas W. (Lobo) field · Vertical
Arco-Marshall #7 (API 42-505-31934) is a well in Zapata County operated by Arco Oil & Gas CO., completed November 10, 1990.
The RRC has issued one drilling permit, issued October 22, 1984, permitted to 12,400 ft.
Completion filings report 3 formation tops, including Queen City, Wilcox, Lobo.
No lease production has been reported under this well’s leases.
Operator of record
Plano, TX · P-5 Y, filed Oct 7, 2005 · 3,065 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Arco Oil & Gas Co. |
| Production reports | Mountain V Texas, LLCthrough Apr 2026 |
| Latest permit | Arco Oil & Gas Co.Oct 22, 1984 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,400
- total depth, ft
- 1
- permits on file
- Oct 22, 1984
- last permit issued
- Nov 10, 1990
- completed
- 0
- cumulative oil, bbl
- 793K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Nov 10, 1990
- 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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Marshall, S.G. G-4-117239 | Las Ovejas, W. (8400) | Mountain V Texas, LLC | 1 | 0 | 793K | Jan 1993 – Jul 2026 |
| — G-4-116090 | — | — | 0 | 0 | 0 | — |
Gas, mcf lease total
Last 12 months 13,205 · prior 12 17,364(-24%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Enron Oil & Gas CompanyJan 1993 → Sep 1999
- 2EOG Resources, Inc.Oct 1999 → Aug 2016
- 3Smith Production Inc.Sep 2016 → Mar 2026
- 4Mountain V Texas, LLCApr 2026 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 255453-99 | Drill | Arco Oil & Gas Co. | Apr 3, 1985 | Oct 22, 1984 | — | 12,400 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-116090 | — | — | — | — |
| — | — G-4-117239 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 566 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Queen City | 3,130 | -2,564 |
| Wilcox | 5,300 | -4,734 |
| WilcoxMIDDLE WILCOX | 8,500 | -7,934 |
| Lobo | 11,000 | -10,434 |
| Lobo | 11,016 | -10,450 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,780 | 8,820 | Perforated |
| 8,787 | 9,122 | Perforated |
| 8,830 | 8,848 | Perforated |
| 9,042 | 9,056 | Perforated |
| 9,080 | 9,092 | Perforated |
| 9,080 | 9,114 | Perforated |
| 9,103 | 9,114 | Perforated |
| 11,387 | 12,153 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,004 | 12.25 | 400 S |
| 7 | 7,686 | 8.5 | 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 | Jul 8, 1991 | Jun 24, 1991 | — |
| 00 | Jun 17, 1991 | Apr 1, 1991 | — |
| 00 | Jun 17, 1991 | Jan 30, 1991 | — |
| 00 | Apr 9, 1991 | Jan 30, 1991 | — |
| 00 | Jul 24, 1985 | Jul 15, 1985 | — |
| 00 | Jul 20, 1985 | — | — |
| 00 | May 8, 1985 | Apr 3, 1985 | — |
| 00 | May 3, 1985 | — | — |
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 42-505-31934 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-505-31934 → 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/50531934, documented in the API reference.