WELL · 42-447-35319 · DISTRICT 7
Lambshead E-11 #1
Throckmorton County · Watt S Spanish Gourd (Miss.) field · Vertical
Lambshead E-11 #1 (API 42-447-35319) is a plugged well in Throckmorton County, plugged January 7, 2000, last operated by Encon Services Inc..
The RRC has issued 2 drilling permits (amended once) between 1992 and 2004, permitted to 5,000 ft.
It was permitted by Throckmorton Oil, Inc. and has since transferred to Encon Services Inc. on the wellbore schedule.
Completion filings report 4 formation tops, including Strawn, Caddo, Barnett, Mississippian.
Its 3 leases have reported 42.5K barrels of oil and 16.8K mcf of gas since December 1994, last reporting in July 2026. The leases carry 3 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Throckmorton Oil, Inc.; the EWA schedule now lists a different operator.
Abilene, TX · P-5 Y, filed Dec 9, 2011 · 93 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Encon Services Inc. |
| Production reports | Breck Operating Corp.through Mar 2019 |
| Latest permit | Throckmorton Oil, Inc.Nov 1, 2004 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,000
- total depth, ft
- 3
- permits on file
- Nov 1, 2004
- last permit issued
- Dec 3, 1994
- completed
- 42.5K
- cumulative oil, bbl
- 16.8K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Dec 1994 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Dec 3, 1994
- Shut in
- —
- Plugged
- Jan 7, 2000
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 |
|---|---|---|---|---|---|---|
| Valley Pens Carr O-8-29591 | Throckmorton County Regular | Amen Oil LLC | 1 | 16K | 0 | Apr 2005 – Jul 2026 |
| Lambshead E-11 O-8-27377 | Watt's Spanish Gourd (Miss.) | Encon Services, Inc. | 1 | 26.5K | 0 | Dec 1994 – May 2005 |
| Lambshead E-11 G-8-152257 | Big Buffalo (Caddo) | Throckmorton Oil, Inc. | 1 | 0 | 16.8K | Dec 1994 – Jan 2000 |
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.
- 1Throckmorton Oil, Inc.Dec 1994 → Jan 2000
- 2Encon Services, Inc.Apr 2005 → Feb 2006
- 3Breck Operating Corp.Mar 2006 → Mar 2019
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 552714-99 | Reenter | Throckmorton Oil, Inc. | Oct 22, 2004 | Nov 1, 2004 | Jan 19, 2005 | 3,900 |
| 405798-98 | Drill | Throckmorton Oil, Inc. | Oct 3, 1994 | Nov 9, 1992 | Nov 4, 1994 | 5,000 |
| 405798-99 | Drill | Throckmorton Oil, Inc. | Nov 6, 1992 | Nov 9, 1992 | — | 5,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-8-152257 | — | — | — | — |
| — | — O-8-27377 | — | — | — | — |
| — | — O-8-29591 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 1,256 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| StrawnSTRAWN SAND | 3,192 | -1,936 |
| CaddoCADDO LIME | 4,151 | -2,895 |
| CaddoBASE CADDO LIME | 4,454 | -3,198 |
| BarnettBARNETT SHALE | 4,506 | -3,250 |
| MississippianMISS. CHESTER | 4,524 | -3,268 |
| MississippianMISS. CHAPPEL | 4,554 | -3,298 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 3,192 | 3,197 | Perforated |
| 4,342 | 4,351 | Perforated |
| 4,540 | 4,564 | Open hole |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 8.625 | 620 | 12.25 | 350 S |
| 5.5 | 3,314 | 7.875 | 175 S |
| 5.5 | 4,540 | 7.875 | 123 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 | Sep 7, 2005 | Apr 25, 2005 | Yes |
| 00 | Jul 11, 2005 | — | — |
| 00 | Mar 21, 1995 | Dec 23, 1994 | Yes |
| 00 | Mar 9, 1995 | Dec 23, 1994 | Yes |
| 00 | Feb 10, 1995 | — | — |
| 00 | Jan 11, 1995 | — | — |
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 42-447-35319 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-447-35319 → 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/44735319, documented in the API reference.