TEXAS · WELLS · UPTON COUNTY · TXL "31" LEASE · API 42-461-37593 · DISTRICT 6E
TXL 31 #12
Upton County · Spraberry (Trend Area) field · Producing · Vertical
Txl 31 #12 (API 42-461-37593) is a well in Upton County operated by Winn Operating LLC, completed March 26, 2012 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit (amended once), issued September 20, 2011, permitted to 11,007 ft.
It was permitted by Cog Operating LLC and has since transferred to Winn Operating LLC on the wellbore schedule.
Completion filings report 7 formation tops, including Spraberry, Dean, Wolfcamp, L. Wolfcamp.
Its lease has reported 580K barrels of oil and 3.71M mcf of gas since November 2008, last reporting volume in August 2026. The lease carries 11 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by COG Operating LLC; the EWA schedule now lists a different operator.
- Based in
- Kilgore, TX
- P-5 status
- Active (A)
- P-5 last filed
- Jan 23, 2026
- Permits on file
- 1
- Phone
- (903) 984-3443
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Winn Operating LLC |
| Production reports | Winn Operating, LLCthrough Aug 2026 |
| Latest permit | COG Operating LLCSep 20, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,007
- total depth, ft
- 2
- permits on file
- Sep 20, 2011
- last permit issued
- Mar 26, 2012
- completed
- 580K
- cumulative oil, bbl
- 3.71M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · NOV 2008 THROUGH AUG 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Mar 26, 2012
- 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.
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 AUG 2026
Texas reports oil by lease, not by well. These are the lease this well is completed on; they carry 11 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| TXL "31" O-9-16786 | Spraberry (Trend Area) | Winn Operating, LLC | 11 | 580K | 3.71M | Nov 2008 – Aug 2026 |
Gas, mcf lease total
Last 12 months 100,388 · prior 12 97,349(+3%)
Oil, barrels lease total
Last 12 months 14,897 · prior 12 15,206(-2%)
Wells named TXL 31
Winn Operating LLC's other wells filed under this lease name in Upton 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.
- 1Terrace Petroleum CorporationNov 2008 → Feb 2011
- 2COG Operating LLCMar 2011 → May 2025
- 3Winn Operating, LLCJun 2025 → Aug 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 722458-98 | Drill | COG Operating LLC | Oct 24, 2011 | Sep 20, 2011 | Jan 14, 2012 | 12,000 |
| 722458-99 | Drill | COG Operating LLC | Aug 16, 2011 | Sep 20, 2011 | Jan 18, 2012 | 10,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Mar 26, 2012 | TXL 31 O-9-16786 | Spraberry (Trend Area) | Winn Operating LLC | Producing | 11,007 |
Formation tops
As filed on W-2/G-1. Subsea from 2,841 ft elevation.Download CSV →
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,760 | 10,890 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 811 | 12.25 | 430 S |
| 5.5 | 11,007 | 7.875 | 1,095 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 | Apr 12, 2013 | May 1, 2012 | Yes |
Well logs
1 log loaded from the RRC's log index, the latest received Feb 10, 2015. Neutron. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| NEUTRON POROSITYSpans Spraberry, Dean, Wolfcamp, L. Wolfcamp, B. Wolfcamp, Strawn, Bend | TIFF | 4,000 to 10,966 | Feb 10, 2015run Feb 16, 2012 | 0.09 |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-461-37593 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-461-37593 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it. The University Lands library has no per-well link: then paste it into its 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/46137593, documented in the API reference.