WELL · 42-391-01400 · DISTRICT 2
Lambert M. F. #121
Refugio County · Tom Oconnor (4400) field · Producing · Vertical
Lambert M. F. #121 (API 42-391-01400) is a well in Refugio County operated by Hilcorp Energy Company, completed February 12, 1986 and listed as producing on the RRC schedule.
The RRC has issued 2 drilling permits between 1983 and 1985, permitted to 5,845 ft.
It was permitted by Pennzoil Producing CO. and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Completion filings report 3 formation tops, including 4,400, 5,250, 5,500.
Its lease has reported 1.73M barrels of oil and 2.54M mcf of gas since January 1993, last reporting in July 2026. The lease carries 45 wells, so these are lease totals, not this well alone.
Operator of record
Permitted by Pennzoil Producing Co.; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active – Extension (X)
- P-5 last filed
- Mar 27, 2026
- Permits on file
- 3,454
- Phone
- (713) 209-2400
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Hilcorp Energy Company |
| Production reports | Hilcorp Energy Companythrough Apr 2026 |
| Latest permit | Pennzoil Producing Co.May 28, 1985 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,845
- total depth, ft
- 2
- permits on file
- May 28, 1985
- last permit issued
- Feb 12, 1986
- completed
- 1.73M
- cumulative oil, bbl
- 2.54M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 12, 1986
- 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.
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 45 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Lambert, M. F. O-2-2115 | Tom Oconnor (4400) | Hilcorp Energy Company | 45 | 1.73M | 2.54M | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 73,710 · prior 12 96,191(-23%)
Gas, mcf lease total
Last 12 months 3,066 · prior 12 5,550(-45%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Pennzoil Exploration & Prod. Co.Jan 1993 → Feb 1999
- 2Pennzenergy Exp. & Prod., L.L.C.Mar 1999 → Mar 2000
- 3Devon Energy Production Co, L.P.Apr 2000 → Jul 2002
- 4Hilcorp Energy CompanyAug 2002 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 276227-99 | Recompletion | Pennzoil Producing Co. | May 17, 1985 | May 28, 1985 | — | 5,845 |
| 209992-99 | Recompletion | Pennzoil Producing Co. | Aug 24, 1983 | Sep 6, 1983 | — | 5,845 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 12, 1986 | Lambert M. F. O-2-2115 | Tom Oconnor (4400) | Hilcorp Energy Company | Producing | 5,845 |
| Nov 2, 1983 | Lambert M.F. O-2-6619 | Tom Oconnor (5250) | Hilcorp Energy Company | Not on Schedule | — |
| — | Lambert M. F. O-2-2590 | Tom Oconnor (5500 Sand) | Hilcorp Energy Company | Not on Schedule | — |
Formation tops
As filed on W-2/G-1. Subsea from 63 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| 4,400 | 4,400 | -4,337 |
| 5,250 | 5,228 | -5,165 |
| 5,500 | 5,543 | -5,480 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 4,392 | 4,397 | Perforated |
| 4,400 | 4,405 | Perforated |
| 5,220 | 5,225 | Perforated |
| 5,228 | 5,233 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 1,021 | 14.75 | 604 S |
| 7 | 5,845 | 9.875 | 732 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 | Feb 27, 1986 | Feb 19, 1986 | Yes |
| 00 | Feb 26, 1986 | — | — |
| 00 | Feb 25, 1984 | Nov 23, 1983 | — |
| 00 | Jan 18, 1984 | Nov 23, 1983 | — |
| 00 | Jan 12, 1984 | — | — |
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 42-391-01400 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-391-01400 → 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/39101400, documented in the API reference.