TEXAS · WELLS · ZAPATA COUNTY · API 42-505-34631 · DISTRICT 04

Yzaguirre - Leo Gas Unit #11

Zapata County · Haynes (Middle Wilcox Cons.) field · Producing · Vertical

Yzaguirre - Leo Gas Unit #11 (API 42-505-34631) is a well in Zapata County operated by Hilcorp Energy Company, completed April 15, 2003 and listed as producing on the RRC schedule.

The RRC has issued one drilling permit (amended once), issued December 4, 2002, permitted to 14,050 ft.

It was permitted by Houston Exploration Company, The and has since transferred to Hilcorp Energy Company on the wellbore schedule.

Completion filings report 6 formation tops, including Perdido Unconformity, Top Perdido A, Top Perdido B, Lobo Unconformity.

Its 2 leases have reported 392 barrels of oil and 4.95M mcf of gas since January 2003, last reporting volume in April 2026. The leases carry 2 wells, so these are lease totals, not this well alone.

Operator of record

Hilcorp Energy Company

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

Watch this operator Watch Zapata County

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, TheDec 4, 2002

The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.

14,050: total depth, ft
2: permits on file
Dec 4, 2002: last permit issued
Apr 15, 2003: completed
392: cumulative oil, bbl
4.95M: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Jan 2003 THROUGH Apr 2026

Regulatory status · RRC wellbore file

Schedule: ON SCHEDULE
Completed: Apr 15, 2003
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 2 leases this well is completed on; they carry 2 wells in total, so volumes are shared.Why →

Lease	Field	Reporting operator	Wells	Oil, bbl	Gas, mcf	Reported
Yzaguirre - Leo Gas Unit G-4-194298	Haynes (Middle Wilcox Cons.)	Hilcorp Energy Company	1	392	4.95M	Jan 2003 – Apr 2026
Yzaguirre - Leo GU G-4-194260	Munoz (Lobo)	Hilcorp Energy Company	1	0	0	Jan 2003 – —

Gas, mcf lease total

Last 12 months 33,570 · prior 12 44,275(-24%)

Chain of custody

Every operator that reported production on this well's lease, in order.

1Houston Exploration Company, TheJan 2003 → Jun 2007
2Forest Oil CorporationJul 2007 → Dec 2012
3Hilcorp Energy CompanyJan 2013 → Apr 2026

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
526053-98	Drill	Houston Exploration Company, The	Jan 31, 2003	Dec 4, 2002	Dec 14, 2002	14,600
526053-99	Drill	Houston Exploration Company, The	Dec 4, 2002	Dec 4, 2002	—	14,600

Completions

Completed	Lease	Field	Operator	Status	Depth
Apr 15, 2003	Yzaguirre - Leo Gas Unit G-4-194298	Haynes (Middle Wilcox Cons.)	Hilcorp Energy Company	Producing	14,050
Jan 18, 2003	Yzaguirre - Leo GU G-4-194260	Munoz (Lobo)	Hilcorp Energy Company	SWR-10-Well · shut in Apr 1, 2003	14,050

Formation tops

As filed on W-2/G-1. Subsea from 387 ft elevation.Download CSV →

Formation	MD ft	Subsea
Perdido Unconformity	10,285	-9,898
Top Perdido A	10,392	-10,005
Top Perdido B	11,072	-10,685
Lobo Unconformity	12,428	-12,041
Top Lobo 3	13,520	-13,133
Top Lobo 6	13,765	-13,378

Perforations

Perforated and open-hole intervals.

From	To	Type
10,416	10,578	Perforated
11,074	11,078	Perforated
11,074	11,128	Perforated
11,082	11,086	Perforated
11,091	11,095	Perforated
11,124	11,128	Perforated
13,768	13,780	Perforated
13,768	13,854	Perforated
13,808	13,814	Perforated
13,847	13,854	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
16	50	17.75	85 S
9.625	789	12.25	350 S
7	9,128	8.75	400 S
4.5	14,033	6.125	450 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 →

RRC record date	W-2 / G-1 date	Logs referenced
Dec 18, 2003	Nov 3, 2003	—
Dec 17, 2003	Nov 3, 2003	—
Jul 22, 2003	Jun 9, 2003	—
May 22, 2003	Apr 21, 2003	Yes
May 21, 2003	Apr 21, 2003	Yes
May 13, 2003	—	—
May 9, 2003	—	—

Well logs

The RRC's map lists this well among those with logs online. Its monthly inventories loaded here, which start in July 2006, list none for it, so none are itemized.

Open the RRC's log search for this well ↗

Find logs withinmiles of this well:List →Map →

Search the well logs loaded into Petrora →

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 42-505-34631 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-505-34631 → 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/50534631, documented in the API reference.