WELL · 42-021-31407 · DISTRICT 1
Hefner #11
Bastrop County · Ross Lee (Austin Chalk) field · Vertical
Hefner #11 (API 42-021-31407) is a plugged well in Bastrop County, plugged January 7, 2004, last operated by R & S Energy Company.
The RRC has issued one drilling permit, issued July 30, 1991, permitted to 3,900 ft.
It was permitted by Shale Operating CO. and has since transferred to R & S Energy Company on the wellbore schedule.
Completion filings report 3 formation tops, including Dale Lime, Serpentine, Austin Chalk.
Its lease has reported 2.1K barrels of oil and 78 mcf of gas since January 1993, last reporting in April 2010. The lease carries 2 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Shale Operating Co.; the EWA schedule now lists a different operator.
Luling, TX · P-5 Y, filed Dec 3, 2010
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | R & S Energy Company |
| Production reports | Rayalto Oil & Gas, Inc.through Feb 2004 |
| Latest permit | Shale Operating Co.Jul 30, 1991 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 3,900
- total depth, ft
- 1
- permits on file
- Jul 30, 1991
- last permit issued
- Aug 20, 1991
- completed
- 2.1K
- cumulative oil, bbl
- 78
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Apr 2010
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Aug 20, 1991
- Shut in
- —
- Plugged
- Jan 7, 2004
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 |
|---|---|---|---|---|---|---|
| Hefner O-1-13376 | Ross Lee (Austin Chalk) | R & S Energy Company | 2 | 2.1K | 78 | Jan 1993 – Apr 2010 |
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.
- 1Shale Operating Co.Jan 1993 → Dec 1993
- 2Thomas Oil & Gas CompanyFeb 1995 → Aug 1997
- 3Axis Energy CorporationSep 1997 → Oct 2000
- 4Rayalto Oil & Gas, Inc.Jun 2001 → Jul 2003
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 390412-99 | Drill | Shale Operating Co. | Jul 30, 1991 | Jul 30, 1991 | Aug 1, 1991 | 3,900 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-13376 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Download CSV →
| Formation | MD ft |
|---|---|
| Dale Lime | 2,935 |
| Serpentine | 3,045 |
| Austin Chalk | 3,050 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 2,970 | 3,050 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 450 | 12.25 | 203 S |
| 5.5 | 3,100 | 7.875 | 401 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 | Mar 20, 1992 | Mar 5, 1992 | Yes |
| 00 | Mar 10, 1992 | — | — |
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 42-021-31407 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-021-31407 → 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/02131407, documented in the API reference.