TEXAS · WELLS · ZAVALA COUNTY · GLASSCOCK, LETA LEASE · API 42-507-32304 · DISTRICT 01
Glasscock Leta #21
Zavala County · Pearsall (Austin Chalk) field · Horizontal
Glasscock Leta #21 (API 42-507-32304) is a plugged horizontal well in Zavala County, plugged May 16, 2022, last operated by Trinity Operating (Usg) LLC.
The RRC has issued one drilling permit (amended once), issued March 21, 1990, permitted to 7,000 ft.
It was permitted by Winn Exploration CO., Inc. and has since transferred to Trinity Operating (Usg) LLC on the wellbore schedule.
Completion filings report one formation top, including Austin Chalk.
Its lease has reported 47.3K mcf of gas since the record begins in January 1993, with no volume in the three years through April 2026.
Operator of record
Permitted by Winn Exploration Co., Inc.; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Jan 28, 2026
- Permits on file
- 392
- Phone
- (713) 951-5309
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Trinity Operating (Usg) LLC |
| Production reports | Trinity Operating (Usg), LLCthrough Aug 2001 |
| Latest permit | Winn Exploration Co., Inc.Mar 21, 1990 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 7,000
- total depth, ft
- 2
- permits on file
- Mar 21, 1990
- last permit issued
- Jun 30, 1991
- completed
- 0
- cumulative oil, bbl
- 47.3K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · ON RECORD FROM JAN 1993, THE RECORD'S FIRST MONTH, THROUGH AUG 2001
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Jun 30, 1991
- Shut in
- —
- Plugged
- May 16, 2022
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.
Wells nearby
Every well with a location on file around this well, in any state, nearest first.
Texas locations come from drilling permits, so most older Texas wells have none and are not listed.
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 |
|---|---|---|---|---|---|---|
| Glasscock, Leta G-1-139614 | Pearsall (Austin Chalk) | Trinity Operating (Usg), LLC | 1 | 0 | 47.3K | by Jan 1993 – Aug 2001 |
No volumes reported on these leases in the last three years.
Wells named Glasscock Leta
Trinity Operating (Usg) LLC's other wells filed under this lease name in Zavala County, newest permit first. The RRC gives a gas well its own lease number, so the name is what joins the wells of a unit.
Loading the lease's wellsChain of custody
Every operator that reported production on this well's lease, in order.
- 1Winn Exploration Co., Inc.Jan 1993 → Jun 1994
- 2McDay Energy Corp.Apr 1995 → Aug 2001
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 371253-98 | Drill | Winn Exploration Co., Inc. | Sep 27, 1991 | Mar 21, 1990 | — | 6,500 |
| 371253-99 | Drill | Winn Exploration Co., Inc. | Mar 21, 1990 | Mar 21, 1990 | Mar 26, 1990 | 7,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Jun 30, 1991 | Glasscock Leta G-1-139614 | Pearsall (Austin Chalk) | Trinity Operating (Usg) LLC | Plugged | — |
Formation tops
As filed on W-2/G-1. Subsea from 659 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Austin Chalk | 6,190 | -5,531 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,447 | 6,478 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 740 | 14.75 | 495 S |
| 7 | 5,927 | 9.875 | 1,071 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 10, 1991 | Aug 28, 1991 | Yes |
| 00 | Oct 29, 1991 | — | — |
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 42-507-32304 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-507-32304 → scanned completion filings
Log images filed since 2004 open from the RRC's log search for this well; none are loaded here for it.
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/50732304, documented in the API reference.