WELL · 42-431-30708 · DISTRICT 8
Foster R. T. Jr. 28 #4
Sterling County · Conger SW (Wolfcamp) field · Vertical
Foster R. T. JR. 28 #4 (API 42-431-30708) is a well in Sterling County operated by Arch Oil & Gas LLC, completed October 16, 2009.
The RRC has issued 2 drilling permits between 1978 and 2009, permitted to 8,000 ft.
It was permitted by Legacy Reserves Operating LP and has since transferred to Arch Oil & Gas LLC on the wellbore schedule.
Completion filings report 3 formation tops, including Wolfcamp, Cisco, Canyon.
Its 4 leases have reported 12.1K barrels of oil and 257K mcf of gas since January 1993, last reporting in July 2026. The leases carry 5 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Legacy Reserves Operating LP; the EWA schedule now lists a different operator.
Ennis, TX · P-5 Y, filed Feb 4, 2026 · (940) 391-7210
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Arch Oil & Gas LLC |
| Production reports | Arch Oil & Gas, LLCthrough Jan 2018 |
| Latest permit | Legacy Reserves Operating LPOct 20, 2009 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,000
- total depth, ft
- 2
- permits on file
- Oct 20, 2009
- last permit issued
- Oct 16, 2009
- completed
- 12.1K
- cumulative oil, bbl
- 257K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Oct 16, 2009
- 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 5 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Foster, R. T. Jr. 28 G-10-134552 | Conger (Penn) | CLR Secondary Recovery, LLC | 1 | 0 | 256K | Jan 1993 – Jul 2026 |
| Foster, R. T. Jr. 28 O-10-57937 | Spraberry (Trend Area) | CLR Secondary Recovery, LLC | 2 | 0 | 0 | Nov 2020 – Jul 2026 |
| Foster, R. T. Jr. 28 O-10-39710 | Conger, SW (Wolfcamp) | Arch Oil & Gas, LLC | 2 | 12.1K | 1.34K | Oct 2009 – Jun 2025 |
| — O-10-24790 | — | — | 0 | 0 | 0 | — |
No volumes reported on these leases in the last three years.
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil CompanyJan 1993 → Oct 1999
- 2Brothers Production Company Inc.Nov 1999 → Mar 2006
- 3Legacy Reserves Operating LPApr 2006 → May 2016
- 4Remnant Oil Operating, LLCJun 2016 → Sep 2016
- 57S Oil & Gas, LLCDec 2016 → Oct 2017
- 6Arch Oil & Gas, LLCDec 2017 → Jan 2018
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 686339-99 | Recompletion | Legacy Reserves Operating LP | Oct 20, 2009 | Oct 20, 2009 | Sep 11, 2009 | 8,000 |
| 31108-99 | Drill | Marathon Oil Company | Aug 22, 1978 | Aug 22, 1978 | Sep 29, 1978 | 8,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-10-134552 | — | — | — | — |
| — | — O-10-24790 | — | — | — | — |
| — | — O-10-39710 | — | — | — | — |
| — | — O-10-57937 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,536 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,038 | 6,310 | Perforated |
| 6,487 | 6,727 | Perforated |
| 6,888 | 7,172 | Perforated |
| 7,436 | 7,494 | Perforated |
| 7,436 | 7,726 | Perforated |
| 7,680 | 7,726 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,819 | 11 | 1,200 S |
| 2.375 | 7,563 | — | — |
| 4.5 | 7,999 | 7.875 | 900 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 2, 2022 | Oct 29, 2009 | Yes |
| 00 | Mar 29, 2010 | Oct 29, 2009 | Yes |
| 00 | Feb 12, 2010 | — | — |
| 00 | Oct 5, 1990 | Jul 5, 1990 | — |
| 00 | Aug 17, 1990 | — | — |
| 00 | Feb 19, 1987 | Jan 29, 1987 | — |
| 00 | Jan 12, 1984 | Aug 8, 1978 | — |
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 42-431-30708 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-431-30708 → 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/43130708, documented in the API reference.