WELL · 42-021-31372 · DISTRICT 1
Hefner #9
Bastrop County · Rosser (Serpentine) field · Vertical
Hefner #9 (API 42-021-31372) is a plugged well in Bastrop County, plugged October 15, 1992, last operated by Shale Operating CO..
The RRC has issued one drilling permit (amended once), issued October 4, 1990, permitted to 3,500 ft.
Completion filings report 2 formation tops, including Dale Lime, Austin Chalk.
Its 2 leases have reported 2.1K barrels of oil and 78 mcf of gas since January 1993, last reporting in April 2010. The leases carry 2 wells, so these are lease totals, not this well alone.
Operator of record
Dallas, TX · P-5 Y, filed Apr 9, 2021 · 38 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Shale Operating Co. |
| Production reports | Rayalto Oil & Gas, Inc.through Feb 2004 |
| Latest permit | Shale Operating Co.Oct 4, 1990 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 3,500
- total depth, ft
- 2
- permits on file
- Oct 4, 1990
- last permit issued
- Dec 4, 1990
- 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
- Dec 4, 1990
- Shut in
- —
- Plugged
- Oct 15, 1992
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 2 leases 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 |
| — O-1-12840 | — | — | 0 | 0 | 0 | — |
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 |
|---|---|---|---|---|---|---|
| 378928-98 | Field transfer | Shale Operating Co. | Jan 30, 1992 | Oct 4, 1990 | — | 3,500 |
| 378928-99 | Drill | Shale Operating Co. | Oct 4, 1990 | Oct 4, 1990 | Oct 4, 1990 | 3,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-12840 | — | — | — | — |
| — | — O-1-13376 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 400 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Dale Lime | 2,875 | -2,475 |
| Austin Chalk | 3,009 | -2,609 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 2,910 | 3,000 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 420 | 12.25 | 226 S |
| 5.5 | 3,252 | 7.875 | 424 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 11, 1992 | Feb 11, 1992 | Yes |
| 00 | Feb 20, 1992 | Feb 3, 1992 | — |
| 00 | Feb 6, 1992 | Jan 28, 1991 | Yes |
| 00 | Feb 8, 1991 | Jan 28, 1991 | Yes |
| 00 | Jan 30, 1991 | — | — |
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 42-021-31372 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-021-31372 → 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/02131372, documented in the API reference.