WELL · 42-311-31915 · DISTRICT 1
STS-E- #303
McMullen County · Big Mule (5500 Sand) field · Vertical
Sts-E- #303 (API 42-311-31915) is a plugged well in Mcmullen County, plugged June 4, 1993, last operated by Tracker Oil & Gas Inc..
The RRC has issued one drilling permit, issued September 13, 1983, permitted to 6,000 ft.
It was permitted by Petrolero Corp. and has since transferred to Tracker Oil & Gas Inc. on the wellbore schedule.
Completion filings report 3 formation tops, including Queen City, Carrizo, Wilcox.
Its lease has reported 11.4K barrels of oil and 3.15K mcf of gas since January 1993, last reporting in July 2026. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Petrolero Corp.; the EWA schedule now lists a different operator.
Bastrop, TX · P-5 Y, filed Jan 5, 2026
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Tracker Oil & Gas Inc. |
| Production reports | Tracker Oil & Gas, Inc.through Jun 2001 |
| Latest permit | Petrolero Corp.Sep 13, 1983 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 6,000
- total depth, ft
- 1
- permits on file
- Sep 13, 1983
- last permit issued
- Nov 16, 1983
- completed
- 11.4K
- cumulative oil, bbl
- 3.15K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Nov 16, 1983
- Shut in
- —
- Plugged
- Jun 4, 1993
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 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| STS-E- O-1-9199 | Big Mule (5500 Sand) | Tracker Oil & Gas, Inc. | 2 | 11.4K | 3.15K | Jan 1993 – Jul 2026 |
No volumes reported on these leases in the last three years.
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Petrolero Corp.Jan 1993 → Sep 1994
- 2Buffalo Oil Corp.Oct 1994 → Apr 1998
- 3Tracker Oil & Gas, Inc.Aug 1999 → Jun 2001
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 211941-99 | Drill | Petrolero Corp. | Aug 30, 1983 | Sep 13, 1983 | Oct 21, 1983 | 6,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-9199 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 397 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Queen City | 1,970 | -1,573 |
| Carrizo | 3,650 | -3,253 |
| WilcoxTOP OF WILCOX | 4,950 | -4,553 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,529 | 5,534 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 259 | 12.25 | 150 S |
| 4.5 | 5,627 | 7.875 | 924 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 | Jan 24, 1984 | Dec 30, 1983 | — |
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 42-311-31915 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-311-31915 → 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/31131915, documented in the API reference.