WELL · 42-283-34666 · DISTRICT 1
Cortez A #4H
LA Salle County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Cortez A #4H (API 42-283-34666) is a horizontal well in La Salle County operated by Trinity Operating (Usg) LLC, completed October 6, 2014 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued April 16, 2014, permitted to 13,000 ft.
It was permitted by Comstock Oil & Gas, LP and has since transferred to Trinity Operating (Usg) LLC on the wellbore schedule.
Completion filings report 10 formation tops, including Wilcox, Escondido, Olmos, Austin Chalk.
Its lease has reported 766K barrels of oil and 820K mcf of gas since March 2012, last reporting in July 2026. The lease carries 6 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Comstock Oil & Gas, LP; 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 Apr 2026 |
| Latest permit | Comstock Oil & Gas, LPApr 16, 2014 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 13,000
- total depth, ft
- 1
- permits on file
- Apr 16, 2014
- last permit issued
- Oct 6, 2014
- completed
- 766K
- cumulative oil, bbl
- 820K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Mar 2012 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 6, 2014
- 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; they carry 6 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Cortez "A" O-1-15834 | Eagleville (Eagle Ford-1) | Trinity Operating (Usg), LLC | 6 | 766K | 820K | Mar 2012 – Jul 2026 |
Oil, barrels lease total
Last 12 months 12,890 · prior 12 16,844(-23%)
Gas, mcf lease total
Last 12 months 14,871 · prior 12 14,677(+1%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Comstock Oil & Gas, LPApr 2012 → Aug 2018
- 2Trinity Operating (Usg), LLCSep 2018 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 781583-99 | Drill | Comstock Oil & Gas, LP | Mar 7, 2014 | Apr 16, 2014 | May 11, 2014 | 13,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-15834 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 419 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| WilcoxWILCOX - DISPOSAL | 2,193 | -1,774 |
| Escondido | 5,587 | -5,168 |
| OlmosOLMOS - DISPOSAL | 6,687 | -6,268 |
| Austin Chalk | 8,400 | -7,981 |
| Eagle FordEAGLE FORD - H2S | 8,683 | -8,264 |
| BudaBUDA - H2S | — | — |
| EdwardsEDWARDS - H2S | — | — |
| Queen City | — | — |
| Sparta | — | — |
| Yegua | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 8,808 | 14,601 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 3,845 | 14.75 | 1,653 S |
| 5.5 | 8,221 | 8.75 | 1,449 S |
| 5 | 14,659 | 8.75 | 1,469 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 10, 2015 | Oct 14, 2014 | — |
| 00 | Feb 6, 2015 | Oct 1, 2014 | Yes |
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 42-283-34666 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-283-34666 → 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/28334666, documented in the API reference.