WELL · 42-371-00291 · DISTRICT 8
Masterson #1
Pecos County · Apco-Warner field · Vertical
Masterson #1 (API 42-371-00291) is a plugged well in Pecos County, plugged May 24, 2004, last operated by Summit Exploration L.L.C..
The RRC has issued one drilling permit, issued July 14, 2006, permitted to 4,545 ft.
It was permitted by Earnest Producing Corporation and has since transferred to Summit Exploration L.L.C. on the wellbore schedule.
Completion filings report 4 formation tops, including San Andres, Clear Fork, Permian (undifferentiated), Ellenbuerger.
Its 2 leases have reported 9K barrels of oil and 11.3K 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.
It holds an active disposal or injection permit, with 5.37K barrels injected in the 12 months reported through May 2026.
Operator of record
Permitted by Earnest Producing Corporation; the EWA schedule now lists a different operator.
Tulsa, OK · P-5 Y, filed Aug 4, 2006
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Summit Exploration L.L.C. |
| Production reports | Synergy Oil & Gas, Inc. (A)through Aug 1999 |
| Latest permit | Earnest Producing CorporationJul 14, 2006 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 4,545
- total depth, ft
- 1
- permits on file
- Jul 14, 2006
- last permit issued
- Apr 30, 1939
- completed
- 9K
- cumulative oil, bbl
- 11.3K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Apr 30, 1939
- Shut in
- —
- Plugged
- May 24, 2004
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 5 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Masterson O-10-39015 | Apco-Warner | Earnest Producing Corporation | 2 | 0 | 0 | Jul 2008 – Jul 2026 |
| Masterson O-10-317 | Apco-Warner | Summit Exploration, L.L.C. | 3 | 9K | 11.3K | Jan 1993 – Mar 2008 |
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.
- 1Graham, Bill J. Oil & Gas Corp.Jan 1993 → Apr 1996
- 2Mills, PeteMay 1996 → Jun 1997
- 3Synergy Oil & Gas, Inc. (A)Jul 1997 → Aug 1999
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 621841-99 | Reenter | Earnest Producing Corporation | Jun 29, 2006 | Jul 14, 2006 | Feb 26, 2007 | 4,545 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-10-317 | — | — | — | — |
| — | — O-10-39015 | — | — | — | — |
| — | — O-10-39015 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 2,425 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| San Andres | 1,730 | 695 |
| Clear ForkCLEARFORK | 2,820 | -395 |
| Permian (undifferentiated)BASE PERMIAN | 4,480 | -2,055 |
| Ellenbuerger | 4,545 | -2,120 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 3,638 | 3,654 | Perforated |
| 3,660 | 3,690 | Perforated |
| 3,699 | 3,702 | Perforated |
| 3,711 | 3,772 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 16 | 230 | 20 | 275 S |
| 16 | 230 | — | — |
| 9.625 | 3,425 | 12.25 | 528 S |
| 9.625 | 3,441 | — | — |
| 5.5 | 4,525 | 7 | 160 S |
| 7 | 4,543 | 8.5 | 160 S |
| 7 | 4,560 | — | — |
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 | Mar 11, 2009 | Aug 1, 2008 | — |
| 00 | Jan 8, 2009 | — | — |
| 00 | Jan 12, 1984 | May 24, 1939 | — |
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 42-371-00291 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-371-00291 → 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.
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Injection
- 5.37K
- bbl, last 12 reported months
- 900K
- bbl, all reported
- May 2026
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000096947 | H-1 Injection | Active | 2,000 | 1,800 | 3,600–4,000 |
MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS
Last 12 months 5,365 · prior 12 3,190(+68%)
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/37100291, documented in the API reference.