WELL · 42-505-33625 · DISTRICT 4
Las Avispas Ranch 39 #4
Zapata County · Las Lomas (Wilcox 7800) field · Vertical
Las Avispas Ranch 39 #4 (API 42-505-33625) is a plugged well in Zapata County, plugged February 25, 2021, last operated by Cfo Resources Inc..
The RRC has issued one drilling permit, issued June 4, 1997, permitted to 9,100 ft.
It was permitted by Enron Oil & Gas Company and has since transferred to Cfo Resources Inc. on the wellbore schedule.
Completion filings report 3 formation tops, including Top Of Queens City, Wilcox, Lwr Wilcox.
Operator of record
Permitted by Enron Oil & Gas Company; the EWA schedule now lists a different operator.
Corpus Christ, TX · P-5 Y, filed May 29, 2025 · (432) 853-4647
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Cfo Resources Inc. |
| Production reports | Cfo Resources, Inc.through Jun 2016 |
| Latest permit | Enron Oil & Gas CompanyJun 4, 1997 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 9,100
- total depth, ft
- 1
- permits on file
- Jun 4, 1997
- last permit issued
- Mar 6, 1999
- completed
- 0
- cumulative oil, bbl
- 451K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Mar 1999 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Mar 6, 1999
- Shut in
- —
- Plugged
- Feb 25, 2021
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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Las Avispas Ranch 39 G-4-172479 | Las Lomas (Wilcox 7800) | Cfo Resources, Inc. | 1 | 0 | 451K | Mar 1999 – 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.
- 1Enron Oil & Gas CompanyMar 1999 → Sep 1999
- 2EOG Resources, Inc.Oct 1999 → Nov 2011
- 3Cfo Resources, Inc.Dec 2011 → Jun 2016
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 463297-99 | Drill | Enron Oil & Gas Company | Jun 4, 1997 | Jun 4, 1997 | Feb 12, 1999 | 9,100 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-4-172479 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 440 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Top of Queens City | 2,336 | -1,896 |
| Wilcox | 4,860 | -4,420 |
| LWR Wilcox | 6,487 | -6,047 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 7,855 | 7,864 | Perforated |
| 7,904 | 7,918 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 530 | 12.25 | 260 S |
| 7 | 6,861 | 8.75 | 165 S |
| 2.875 | 8,084 | 6.25 | 270 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 | May 3, 1999 | Apr 1, 1999 | Yes |
| 00 | Apr 23, 1999 | — | — |
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 42-505-33625 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-505-33625 → 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/50533625, documented in the API reference.