TEXAS · WELLS · SCHLEICHER COUNTY · JEFFERS 28A LEASE · API 42-413-31740 · DISTRICT 6E
Jeffers 28A #1
Schleicher County · Sawyer (Canyon) field · Producing · Vertical
Jeffers 28a #1 (API 42-413-31740) is a well in Schleicher County operated by Upp Operating LLC, completed November 1, 1990 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued September 26, 1990, permitted to 8,380 ft.
It was permitted by Parker & Parsley, Ltd. and has since transferred to Upp Operating LLC on the wellbore schedule.
Completion filings report 5 formation tops, including Base Cretaceous (marker), Canyon, Strawn, Pennsylvanian.
No lease production has been reported under this well’s leases.
Operator of record
Permitted by Parker & Parsley, Ltd.; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Mar 6, 2026
- Permits on file
- 33
- Phone
- (713) 495-5300
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Upp Operating LLC |
| Production reports | Upp Operating, LLCthrough Apr 2026 |
| Latest permit | Parker & Parsley, Ltd.Sep 26, 1990 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 8,380
- total depth, ft
- 1
- permits on file
- Sep 26, 1990
- last permit issued
- Nov 1, 1990
- completed
- 0
- cumulative oil, bbl
- 545K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Nov 1, 1990
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
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 |
|---|---|---|---|---|---|---|
| Jeffers 28A G-9-136278 | Sawyer (Canyon) | Upp Operating, LLC | 1 | 0 | 545K | Jan 1993 – Jul 2026 |
Gas, mcf lease total
Last 12 months 4,994 · prior 12 10,154(-51%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Parker & Parsley Development Co.Jan 1993 → Feb 1995
- 2Parker & Parsley Development L.PMar 1995 → May 1996
- 3Costilla Petroleum CorporationJun 1996 → Jan 1997
- 4Costilla Energy, Inc.Feb 1997 → Dec 1997
- 5Concho Resources Inc.Jan 1998 → Jun 2001
- 6Devon Energy Production Co, L.P.Aug 2001 → Jun 2002
- 7Merit Energy CompanyJul 2002 → Nov 2003
- 8Dominion Oklahoma Texas E&P, IncDec 2003 → Dec 2007
- 9Highmount Expl & Prod Texas LLCJan 2008 → Sep 2014
- 10Enervest Operating, L.L.C.Oct 2014 → Mar 2019
- 11Upp Operating, LLCApr 2019 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 378331-99 | Drill | Parker & Parsley, Ltd. | Sep 24, 1990 | Sep 26, 1990 | — | 8,400 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Nov 1, 1990 | Jeffers 28A G-9-136278 | Sawyer (Canyon) | Upp Operating LLC | Producing | 8,380 |
Formation tops
As filed on W-2/G-1. Subsea from 2,301 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Base Cretaceous (marker)BASE CRETACEOUS | 750 | 1,551 |
| Canyon | 7,375 | -5,074 |
| Strawn | 8,200 | -5,899 |
| PennsylvanianPENN DETRITAL | 8,290 | -5,989 |
| Ellenburger | 8,315 | -6,014 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,376 | 7,430 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 1,771 | 11 | 625 S |
| 4.5 | 8,357 | 7.875 | 700 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 | Feb 20, 1991 | Nov 29, 1990 | Yes |
| 00 | Dec 31, 1990 | — | — |
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 42-413-31740 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-413-31740 → 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/41331740, documented in the API reference.