TEXAS · WELLS · ZAPATA COUNTY · MARSHALL, S.G. LEASE · API 42-505-32326 · DISTRICT 04
Marshall S.G. #12
Zapata County · Pok - a - Dot (8600) field · Producing · Vertical
Marshall S.G. #12 (API 42-505-32326) is a well in Zapata County operated by Mountain V Texas LLC, completed July 22, 1987 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued May 19, 1987, permitted to 12,900 ft.
It was permitted by Arco Oil & Gas CO. and has since transferred to Mountain V Texas LLC on the wellbore schedule.
Completion filings report 2 formation tops, including Queen City, Wilcox.
Its lease has reported 17.7K barrels of oil and 3.39M mcf of gas since January 1993, last reporting volume in April 2026.
Operator of record
Permitted by Arco Oil & Gas Co.; the EWA schedule now lists a different operator.
- Based in
- Buckhannon, WV
- P-5 status
- Active (A)
- P-5 last filed
- Sep 11, 2025
- Phone
- (304) 842-6320
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Mountain V Texas LLC |
| Production reports | Mountain V Texas, LLCthrough Apr 2026 |
| Latest permit | Arco Oil & Gas Co.May 19, 1987 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 12,900
- total depth, ft
- 2
- permits on file
- May 19, 1987
- last permit issued
- Jul 22, 1987
- completed
- 17.7K
- cumulative oil, bbl
- 3.39M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jul 22, 1987
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
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 lease 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-4-124742 | Pok - a - Dot (8600) | Mountain V Texas, LLC | 1 | 17.7K | 3.39M | Jan 1993 – Apr 2026 |
Gas, mcf lease total
Last 12 months 27,730 · prior 12 29,064(-5%)
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 |
|---|---|---|---|---|---|---|
| 330344-98 | Drill | Arco Oil & Gas Co. | Jun 26, 1987 | May 19, 1987 | — | 13,500 |
| 330344-99 | Drill | Arco Oil & Gas Co. | May 15, 1987 | May 19, 1987 | — | 12,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jul 22, 1987 | Marshall S.G. G-4-124742 | Pok - a - Dot (8600) | Mountain V Texas LLC | Producing | 12,900 |
Formation tops
As filed on W-2/G-1. Subsea from 561 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,682 | 8,689 | Perforated |
| 8,781 | 8,814 | Perforated |
| 8,878 | 8,900 | Perforated |
| 8,993 | 8,996 | Perforated |
| 9,012 | 9,015 | Perforated |
| 9,026 | 9,030 | Perforated |
| 9,083 | 9,100 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 14 | 50 | — | — |
| 9.625 | 1,000 | 12.25 | 350 S |
| 7 | 8,003 | 8.5 | 150 S |
| 2.875 | 9,521 | 6 | 375 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Jun 1, 1990 | Apr 27, 1990 | — |
| 00 | May 12, 1988 | Apr 15, 1988 | Yes |
| 00 | Sep 15, 1987 | Jul 31, 1987 | Yes |
| 00 | Aug 7, 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 42-505-32326 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-505-32326 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here for it.
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/50532326, documented in the API reference.