TEXAS · WELLS · PECOS COUNTY · MASTERSON, J. S. LEASE · API 42-371-35623 · DISTRICT 7B
Masterson J. S. #21
Pecos County · Shearer field · Shut In · Vertical
Masterson J. S. #21 (API 42-371-35623) is a well in Pecos County operated by O & O Operators LLC., completed November 4, 1985 and listed as shut in on the RRC schedule, shut in June 1, 2007.
The RRC has issued one drilling permit, issued October 7, 1985, permitted to 1,680 ft.
It was permitted by Lawrence, C. F. & Assoc. Inc. and has since transferred to O & O Operators LLC. on the wellbore schedule.
Completion filings report 3 formation tops, including Yates, Seven Rivers, Queen.
Its lease has reported 12.6K barrels of oil and 55 mcf of gas since January 1993, with no volume in the three years through April 2026. The lease carries 19 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Lawrence, C. F. & Assoc. Inc.; the EWA schedule now lists a different operator.
- Based in
- Fate, TX
- P-5 status
- Delinquent (D)
- P-5 last filed
- May 29, 2025
- Phone
- (432) 385-7242
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | O & O Operators LLC. |
| Production reports | O & O Operators, LLC.through Jun 2016 |
| Latest permit | Lawrence, C. F. & Assoc. Inc.Oct 7, 1985 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 1,680
- total depth, ft
- 1
- permits on file
- Oct 7, 1985
- last permit issued
- Nov 4, 1985
- completed
- 12.6K
- cumulative oil, bbl
- 55
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jun 2016
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Nov 4, 1985
- Shut in
- Jun 1, 2007
- Plugged
- —
Operator's P-5 on the schedule: Delinquent (D)
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; they carry 19 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Masterson, J. S. O-10-5865 | Shearer | O & O Operators, LLC. | 19 | 12.6K | 55 | Jan 1993 – Jun 2016 |
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.
- 1Lawrence, C. F. & Assoc. Inc.Jan 1993 → Jul 1994
- 2Riley Production, Inc.Aug 1994 → Dec 1996
- 3Diamond M Oil Co., Inc.Jan 1997 → Jul 1998
- 4Raider Oil & Gas CompanyOct 2000 → Dec 2002
- 5Pharaoh Oil & Gas, Inc.Jan 2003 → May 2007
- 6Tripp & Sons, LLCJul 2004 → Jan 2005
- 7O & O Operators, LLC.Jun 2007 → Jun 2016
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 286636-99 | Drill | Lawrence, C. F. & Assoc. Inc. | Sep 18, 1985 | Oct 7, 1985 | — | 1,600 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Nov 4, 1985 | Masterson J. S. O-10-5865 | Shearer | O & O Operators LLC. | Shut In · shut in Jun 1, 2007 | 1,680 |
Formation tops
As filed on W-2/G-1. Subsea from 2,417 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 1,240 | 1,177 |
| Seven Rivers7 RIVERS | 1,347 | 1,070 |
| Queen | 1,533 | 884 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 1,570 | 1,580 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 390 | 11 | 200 S |
| 5.5 | 1,680 | 7.875 | 350 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 | Dec 29, 1989 | Dec 6, 1989 | — |
| 00 | Dec 21, 1989 | — | — |
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 42-371-35623 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-371-35623 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here for it. The University Lands library has no per-well link: then paste it into its search.
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Injection
- 0
- bbl, last 12 reported months
- 307K
- bbl, all reported
- May 2015
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000058665 | H-1 Injection | Canceled Nov 21, 2022 | 0 | 775 | 1,570–0 |
MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS
Last 12 months 0 · prior 12 0
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/37135623, documented in the API reference.