WELL · 42-489-31104 · DISTRICT 4
Yturria #4
Willacy County · LA Sara E. (7890) field · Vertical
Yturria #4 (API 42-489-31104) is a well in Willacy County operated by Texas Oil And Gas Operating LLC, completed December 29, 2004.
The RRC has issued one drilling permit (amended once), issued October 6, 2004, permitted to 9,400 ft.
It was permitted by Tucker Operating CO., Inc. and has since transferred to Texas Oil And Gas Operating LLC on the wellbore schedule.
Completion filings report 3 formation tops, including 7890 Sand, Frio, Miocene (undifferentiated).
Its 3 leases have reported 5.95K barrels of oil and 529K mcf of gas since December 2004, last reporting in July 2026. The leases carry 3 wells, so these are lease totals, not this well alone.
Operator of record
Texas Oil and Gas Operating LLC
Permitted by Tucker Operating Co., Inc.; the EWA schedule now lists a different operator.
Friendswood, TX · P-5 Y, filed Sep 4, 2025 · 7 permits on file · (281) 317-8221
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Texas Oil and Gas Operating LLC |
| Production reports | Texas Oil and Gas Operating, LLCthrough Oct 2025 |
| Latest permit | Tucker Operating Co., Inc.Oct 6, 2004 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,400
- total depth, ft
- 2
- permits on file
- Oct 6, 2004
- last permit issued
- Dec 29, 2004
- completed
- 5.95K
- cumulative oil, bbl
- 529K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Dec 2004 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Dec 29, 2004
- Shut in
- —
- Plugged
- —
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 3 leases this well is completed on; they carry 3 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Yturria G-4-295146 | LA Sara, E. (7890) | Texas Oil and Gas Operating, LLC | 1 | 0 | 15.5K | Jul 2023 – Jul 2026 |
| Yturria O-4-13550 | LA Sara, E. (7890) | Texas Oil and Gas Operating, LLC | 1 | 5.95K | 22K | Feb 2009 – Jul 2026 |
| Yturria G-4-210296 | LA Sara, E. (7890) | Blakenergy Operating, LLC | 1 | 0 | 491K | Dec 2004 – Aug 2009 |
Gas, mcf lease total
Last 12 months 1,674 · prior 12 7,006(-76%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Tucker Operating Co., Inc.Dec 2004 → Jun 2005
- 2Blakenergy Operating, LLCJul 2005 → Feb 2011
- 3Risco la Sara Operations, LLCMar 2011 → Mar 2014
- 4LA Sara Operating Company, LLCOct 2014 → Nov 2014
- 5Texas Oil and Gas Operating, LLCJan 2020 → Oct 2025
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 551994-98 | Drill | Tucker Operating Co., Inc. | Mar 10, 2005 | Oct 6, 2004 | Nov 4, 2004 | 9,200 |
| 551994-99 | Drill | Tucker Operating Co., Inc. | Oct 6, 2004 | Oct 6, 2004 | — | 9,400 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-210296 | — | — | — | — |
| — | — G-4-295146 | — | — | — | — |
| — | — O-4-13550 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 35 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| 7890 Sand | 7,825 | -7,790 |
| Frio | — | — |
| Miocene (undifferentiated)MIOCENE | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,827 | 7,834 | Perforated |
| 7,926 | 7,928 | Perforated |
| 7,948 | 7,952 | Perforated |
| 7,960 | 7,962 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 1,162 | 12.25 | 1,075 S |
| 9.625 | 7,162 | 12.25 | 1,075 S |
| 5.5 | 8,552 | 8.75 | 1,075 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 | Aug 2, 2023 | Jul 11, 2023 | Yes |
| 00 | Nov 18, 2009 | Mar 25, 2009 | — |
| 00 | Jul 13, 2009 | — | — |
| 00 | Nov 7, 2005 | Feb 10, 2005 | Yes |
| 00 | Aug 31, 2005 | — | — |
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 42-489-31104 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-489-31104 → 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/48931104, documented in the API reference.