TEXAS · WELLS · ZAPATA COUNTY · ALFONSO LEASE · API 42-505-35045 · DISTRICT 04
Alfonso #27
Zapata County · Charco (9900) field · Producing · Vertical
- Fields on the latest permit · any of 3
- Charco (9200) · Charco (9400) · Charco (9900)
- Not one formation; the well must be completed in one of them, and no target formation is stated. The district's wildcat field is also on the permit.
Alfonso #27 (API 42-505-35045) is a well in Zapata County operated by Hilcorp Energy Company, completed October 23, 2004 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued August 18, 2004, permitted to 10,320 ft.
It was permitted by Houston Exploration Company, The and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Completion filings report 5 formation tops, including Perdido Unconformity, Top Perdido A, Base Perdido A, Top Perdido B.
Its lease has reported 83 barrels of oil and 307K mcf of gas since October 2004, last reporting volume in April 2026.
Operator of record
Permitted by Houston Exploration Company, The; 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
- 3,458
- 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 | Houston Exploration Company, TheAug 18, 2004 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 10,320
- total depth, ft
- 1
- permits on file
- Aug 18, 2004
- last permit issued
- Oct 23, 2004
- completed
- 83
- cumulative oil, bbl
- 307K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Oct 2004 THROUGH Apr 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 23, 2004
- 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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Alfonso G-4-206073 | Charco (9900) | Hilcorp Energy Company | 1 | 83 | 307K | Oct 2004 – Apr 2026 |
Gas, mcf lease total
Last 12 months 7,257 · prior 12 7,527(-4%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Houston Exploration Company, TheOct 2004 → Jun 2007
- 2Forest Oil CorporationJul 2007 → Dec 2012
- 3Hilcorp Energy CompanyJan 2013 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 548230-99 | Drill | Houston Exploration Company, The | Jul 14, 2004 | Aug 18, 2004 | — | 10,320 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Oct 23, 2004 | Alfonso G-4-206073 | Charco (9900) | Hilcorp Energy Company | Producing | 10,320 |
Formation tops
As filed on W-2/G-1. Subsea from 387 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Perdido Unconformity | 9,434 | -9,047 |
| Top Perdido A | 9,463 | -9,076 |
| Base Perdido A | 9,678 | -9,291 |
| Top Perdido B | 9,918 | -9,531 |
| Base Perdido B | 10,051 | -9,664 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 9,466 | 9,480 | Perforated |
| 9,466 | 9,656 | Perforated |
| 9,528 | 9,535 | Perforated |
| 9,537 | 9,542 | Perforated |
| 9,554 | 9,556 | Perforated |
| 9,562 | 9,564 | Perforated |
| 9,626 | 9,632 | Perforated |
| 9,640 | 9,643 | Perforated |
| 9,650 | 9,656 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 16 | 55 | 17.75 | 100 S |
| 9.625 | 750 | 12.25 | 350 S |
| 7 | 8,812 | 8.75 | 410 S |
| 3.5 | 10,005 | 6.25 | 225 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. The record date is the RRC's own date on the record, not the day the report was filed: 462,034 of the state's filings carry 1984-01-12. About these reports →
| Suffix | RRC record date | W-2 / G-1 date | Logs referenced |
|---|---|---|---|
| 00 | Apr 21, 2005 | Dec 15, 2004 | Yes |
| 00 | Feb 9, 2005 | — | — |
Well logs
1 log loaded from the RRC's log index, the latest received May 20, 2008. Density, Gamma ray, Neutron, Resistivity. These are the logs loaded into Petrora from the Railroad Commission's inventories, not necessarily every log run on the well. The RRC holds the files; each opens from its log search for the well. The kind is the RRC's description of the log; the interval is the one filed for it.
Open the RRC's log search for this well ↗| Logas described | Files | Intervalft, as filed | Datereceived | SizeMB |
|---|---|---|---|---|
| Combination: Resistivity/Neutron Density PorosityCOMPENSATED GAMMA RAY NEUTRON LITHODENSITYSpans Perdido Unconformity, Top Perdido A, Base Perdido A, Top Perdido B, Base Perdido B | TIFF | 8,819 to 10,330 | May 20, 2008run Oct 17, 2004 | — |
"Spans" is by this well's own filed formation tops: a formation runs from its top to the next deeper top filed, and the deepest runs to the bottom of the log. Depths are measured along the wellbore, so on a horizontal the lateral counts in the formation it was landed in.
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 42-505-35045 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-505-35045 → scanned completion filings
The logs loaded for this well are under Well logs, with the RRC's log search for it.
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/50535045, documented in the API reference.