WELL · 42-505-31812 · DISTRICT 4
Leonardo #4
Zapata County · Charco (9400) field · Vertical
Leonardo #4 (API 42-505-31812) is a plugged well in Zapata County, plugged January 15, 1987, last operated by Transamerican Natural Gas Corp..
The RRC has issued one drilling permit, issued May 17, 1984, permitted to 10,500 ft.
It was permitted by Ghr Enrgy.Corp-Amer.Coastal Corp and has since transferred to Transamerican Natural Gas Corp. on the wellbore schedule.
Completion filings report 3 formation tops, including Queen City, Wilcox, Perdido Unconformity.
Operator of record
Transamerican Natural Gas Corp.
Permitted by GHR Enrgy.corp-Amer.coastal Corp; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Aug 4, 2025 · 772 permits on file
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Transamerican Natural Gas Corp. |
| Production reports | none |
| Latest permit | GHR Enrgy.corp-Amer.coastal CorpMay 17, 1984 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,500
- total depth, ft
- 1
- permits on file
- May 17, 1984
- last permit issued
- Nov 10, 1984
- completed
- —
- cumulative oil, bbl
- —
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Nov 10, 1984
- Shut in
- —
- Plugged
- Jan 15, 1987
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.
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 239196-99 | Drill | GHR Enrgy.corp-Amer.coastal Corp | Jun 6, 1984 | May 17, 1984 | Jun 8, 1984 | 10,500 |
Formation tops
As filed on W-2/G-1. Subsea from 365 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Queen City | 3,475 | -3,110 |
| WilcoxWILCOX CARRIZZO | 6,110 | -5,745 |
| WilcoxBASE OF WILCOX | 8,100 | -7,735 |
| Perdido Unconformity | 9,150 | -8,785 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,710 | 9,720 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 750 | 14.75 | 225 S |
| 7.625 | 8,200 | 9.875 | 300 S |
| 5 | 10,310 | 6.75 | 300 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 12, 1985 | Jan 8, 1985 | — |
| 00 | Feb 16, 1985 | Nov 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 42-505-31812 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-505-31812 → 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/50531812, documented in the API reference.