TEXAS · WELLS · ANDREWS COUNTY · API 42-003-10078 · DISTRICT 7B
Southwest Andrews Unit #4R
Andrews County · Andrews (Wolfcamp-Penn.) field · Vertical
Southwest Andrews Unit #4R (API 42-003-10078) is a plugged well in Andrews County, plugged November 2, 2011, last operated by Morningstar Operating LLC.
The RRC has issued 2 drilling permits between 1993 and 1994, permitted to 9,730 ft.
It was permitted by Union Oil Company Of California and has since transferred to Morningstar Operating LLC on the wellbore schedule.
Completion filings report 5 formation tops, including Yates, Pennsylvanian, Canyon, Strawn.
Its 3 leases have reported 2.51M barrels of oil and 3.9M mcf of gas since July 1993, last reporting in July 2026. The leases carry 39 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Union Oil Company of California; the EWA schedule now lists a different operator.
- Based in
- Fort Worth, TX
- P-5 status
- Active (A)
- P-5 last filed
- Feb 18, 2026
- Permits on file
- 12
- Phone
- (817) 334-8096
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Morningstar Operating LLC |
| Production reports | Morningstar Operating LLCthrough Apr 2026 |
| Latest permit | Union Oil Company of CaliforniaMay 4, 1994 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,730
- total depth, ft
- 2
- permits on file
- May 4, 1994
- last permit issued
- May 1, 1994
- completed
- 2.51M
- cumulative oil, bbl
- 3.9M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jul 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- May 1, 1994
- Shut in
- —
- Plugged
- Nov 2, 2011
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 3 leases this well is completed on; they carry 39 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Southwest Andrews Unit O-10-35543 | Andrews (Wolfcamp-Penn.) | Morningstar Operating LLC | 37 | 2.48M | 3.87M | Dec 1997 – Jul 2026 |
| State of Texas AG O-10-34696 | Andrews (Wolfcamp-Penn.) | Union Oil Company of California | 1 | 8.41K | 9.83K | Oct 1995 – Feb 1998 |
| State of Texas AG O-10-33954 | Andrews (Pennsylvanian) | Union Oil Company of California | 1 | 26.8K | 23.5K | Jul 1993 – Dec 1995 |
Oil, barrels lease total
Last 12 months 50,794 · prior 12 44,560(+14%)
Gas, mcf lease total
Last 12 months 16,189 · prior 12 37,096(-56%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Union Oil Company of CaliforniaAug 1993 → May 2000
- 2Pure Resources, L.P.Jun 2000 → Mar 2006
- 3Chevron Midcontinent, L.P.Apr 2006 → Dec 2021
- 4Morningstar Partners, L.P.Jan 2022 → Apr 2022
- 5Morningstar Operating LLCMay 2022 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 423512-99 | Other | Union Oil Company of California | May 2, 1994 | May 4, 1994 | Apr 7, 1994 | 8,665 |
| 412188-99 | Reenter | Union Oil Company of California | May 27, 1993 | May 28, 1993 | — | 9,730 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| May 1, 1994 | Southwest Andrews Unit O-10-35543 | Andrews (Wolfcamp-Penn.) | Morningstar Operating LLC | Plugged | — |
| May 1, 1994 | State of Texas AG O-10-34696 | Andrews (Wolfcamp-Penn.) | Union Oil Company of California | Plugged | — |
| May 1, 1994 | State of Texas AG O-10-34696 | Andrews (Wolfcamp-Penn.) | Union Oil Company of California | Plugged | — |
| May 1, 1994 | State of Texas AG O-10-33954 | Andrews (Pennsylvanian) | Union Oil Company of California | Plugged | — |
| May 1, 1994 | State of Texas AG O-10-33954 | Andrews (Pennsylvanian) | Union Oil Company of California | Plugged | — |
| — | State of Texas -AG- O-10-17785 | Andrews North (Ellenburger) | Texaco Inc. | Plugged | — |
| — | State of Texas -AG- O-10-17861 | Andrews N. (Devonian) | Texaco Inc. | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 3,202 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 3,080 | 122 |
| PennsylvanianPENN DETRITAL | 8,744 | -5,542 |
| PennsylvanianPENN LIME | 8,920 | -5,718 |
| Canyon | 9,098 | -5,896 |
| Strawn | 9,374 | -6,172 |
| Atoka | 9,676 | -6,474 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,589 | 8,665 | Perforated |
| 8,768 | 8,866 | Perforated |
| 8,768 | 9,485 | Perforated |
| 9,000 | 9,116 | Perforated |
| 9,218 | 9,485 | Perforated |
| — | 10,431 | Perforated |
| — | 12,441 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 2.875 | 4 | 8.75 | — |
| 13.375 | 310 | — | 300 S |
| 9.625 | 4,815 | — | 3,000 S |
| 5.5 | 9,729 | 7.875 | 1,655 S |
| 5.5 | 9,729 | — | 1,655 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 | Dec 3, 1997 | May 27, 1994 | — |
| 00 | Oct 26, 1995 | May 27, 1994 | — |
| 00 | Jul 29, 1994 | May 27, 1994 | — |
| 00 | Nov 9, 1993 | Aug 19, 1993 | Yes |
| 00 | Oct 4, 1993 | — | — |
| 00 | Jan 12, 1984 | — | — |
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 42-003-10078 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-003-10078 → 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/00310078, documented in the API reference.