TEXAS · WELLS · MIDLAND COUNTY · ULVESTAD-BIRKHEAD E20L LEASE · API 42-329-46213 · DISTRICT 7B

Ulvestad-Birkhead E20L #12H

Midland County · Spraberry (Trend Area) field · Producing · Horizontal

Ulvestad-Birkhead E20l #12H (API 42-329-46213) is a horizontal well in Midland County operated by Pioneer Natural Res. USA Inc., completed December 12, 2023 and listed as producing on the RRC schedule.

The RRC has issued one drilling permit, issued March 31, 2023, permitted to 8,727 ft.

Completion filings report 16 formation tops, including Santa Rosa, Rustler, Yates, Seven Rivers.

Its lease has reported 341K barrels of oil and 555K mcf of gas since June 2023, last reporting volume in April 2026.

Operator of record

Pioneer Natural Res. USA Inc.

Based in: Spring, TX
P-5 status: Active (A)
P-5 last filed: Jul 8, 2026
Permits on file: 15,628
Phone: (972) 444-4001

Watch this operator Watch Midland County

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore schedule	Pioneer Natural Res. USA Inc.
Production reports	Pioneer Natural Res. USA, Inc.through Apr 2026
Latest permit	Pioneer Natural Res. USA, Inc.Mar 31, 2023

8,727: total depth, ft
1: permits on file
Mar 31, 2023: last permit issued
Dec 12, 2023: completed
341K: cumulative oil, bbl
555K: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Dec 2023 THROUGH Apr 2026

Regulatory status · RRC wellbore file

Schedule: ON SCHEDULE
Completed: Dec 12, 2023
Shut in: —
Plugged: —

Operator's P-5 on the schedule: Active (A)

Surface location

31.925152, -102.099377 NAD27, as filed

31.925277, -102.099792 WGS84

Google Maps ↗

Permit surface location from the RRC GIS record, referenced to NAD27 as the RRC files it; the WGS84 pair is the same point through NOAA's NADCON grid, and the map link uses it, in Midland County.

Wells nearby

Withinmiles

Every well with a location on file around this one, in any state, nearest first.

Open the full map →

Texas locations come from drilling permits, so most older Texas wells have none and are not listed.

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
Ulvestad-Birkhead E20L O-10-60139	Spraberry (Trend Area)	Pioneer Natural Res. USA, Inc.	1	341K	555K	Jun 2023 – Apr 2026

Oil, barrels lease total

Last 12 months 74,413 · prior 12 150,591(-51%)

Gas, mcf lease total

Last 12 months 152,083 · prior 12 269,771(-44%)

Chain of custody

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

1Pioneer Natural Res. USA, Inc.Dec 2023 → Apr 2026

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
889303-99	Drill	Pioneer Natural Res. USA, Inc.	Mar 24, 2023	Mar 31, 2023	Apr 19, 2023	10,514

Completions

Completed	Lease	Field	Operator	Status	Depth
Dec 12, 2023	Ulvestad-Birkhead E20L O-10-60139	Spraberry (Trend Area)	Pioneer Natural Res. USA Inc.	Producing	8,727

Formation tops

As filed on W-2/G-1. Subsea from 2,839 ft elevation.Download CSV →

Formation	MD ft	Subsea
Santa Rosa	1,141	1,698
Rustler	1,752	1,087
Yates	2,788	51
Seven Rivers	3,091	-252
Queen	3,882	-1,043
Grayburg	4,408	-1,569
San AndresSAN ANDRES - HIGH FLOWS, H2S, CO	4,595	-1,756
Atoka	—	—
Cambrian	—	—
Devonian	—	—
Ellenburger	—	—
Fusselman	—	—
Mississippian	—	—
Pennsylvanian	—	—
Precambrian (Undifferentiated)	—	—
Strawn	—	—

Perforations

Perforated and open-hole intervals.

From	To	Type
9,030	16,691	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
13.375	1,557	17.5	1,750 S
9.625	6,228	12.25	1,660 S
5.5	16,716	6.75	795 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	May 30, 2024	Mar 26, 2024	—
00	Jan 30, 2024	Nov 10, 2023	Yes

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 42-329-46213 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-329-46213 → scanned completion filings

Log images filed since 2004 open from the RRC's log search for this well; none are loaded here for it.

Find logs withinmiles of this well:List →Map →

Nearby wells and their tops

NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM

Draw a cross-section

This well's tops beside its 5 nearest neighbors, subsea-aligned so they line up regardless of surface terrain.

Open the cross-section →

Cass-Ernest E20S42-329-43006

0.0 KM · Pioneer Natural Res. USA, Inc. · Section with this well →

Santa Rosa	1,141	1,698
Rustler	1,752	1,087
Yates	2,793	46
Seven Rivers	3,092	-253
Queen	3,889	-1,050
Grayburg	4,417	-1,578
San Andres	4,609	-1,770
Clear Fork	6,981	-4,142

13 TOPS · FIRST 8

Cass-Ernest E20T42-329-46083

0.0 KM · Pioneer Natural Res. USA, Inc. · Section with this well →

Santa Rosa	1,141	1,698
Rustler	1,752	1,087
Yates	2,784	55
Seven Rivers	3,088	-249
Queen	3,885	-1,046
Grayburg	4,410	-1,571
San Andres	4,601	-1,762
Clear Fork	6,996	-4,157

10 TOPS · FIRST 8

Cass-Ernest E20U42-329-46084

0.0 KM · Pioneer Natural Res. USA, Inc. · Section with this well →

Santa Rosa	1,141	1,698
Rustler	1,752	1,087
Yates	2,788	51
Seven Rivers	3,089	-250
Queen	3,886	-1,047
Grayburg	4,415	-1,576
San Andres	4,607	-1,768
Clear Fork	7,003	-4,164

10 TOPS · FIRST 8

Cass-Ernest E20V42-329-46085

0.0 KM · Pioneer Natural Res. USA, Inc. · Section with this well →

Santa Rosa	1,141	1,698
Rustler	1,752	1,087
Yates	2,783	56
Seven Rivers	3,093	-254
Queen	3,886	-1,047
Grayburg	4,416	-1,577
San Andres	4,602	-1,763
Clear Fork	6,999	-4,160

11 TOPS · FIRST 8

Cass-Ernest E20W42-329-46086

0.0 KM · Pioneer Natural Res. USA, Inc. · Section with this well →

Santa Rosa	1,141	1,698
Rustler	1,752	1,087
Yates	2,792	47
Seven Rivers	3,095	-256
Queen	3,890	-1,051
Grayburg	4,416	-1,577
San Andres	4,606	-1,767
Clear Fork	6,996	-4,157

10 TOPS · FIRST 8

Cass-Ernest E20X42-329-43105

0.0 KM · Pioneer Natural Res. USA, Inc. · Section with this well →

Santa Rosa	1,141	1,698
Rustler	1,752	1,087
Yates	2,787	52
Seven Rivers	3,093	-254
Queen	3,887	-1,048
Grayburg	4,415	-1,576
San Andres	4,607	-1,768
Clear Fork	6,998	-4,159

10 TOPS · FIRST 8

Cass-Ernest E20M42-329-42632

0.1 KM · Pioneer Natural Res. USA, Inc. · Section with this well →

Santa Rosa	1,133	1,702
Yates	2,793	42
Seven Rivers	3,093	-258
Queen	3,849	-1,014
Grayburg	4,404	-1,569
San Andres	4,667	-1,832
Clear Fork	7,001	-4,166
Spraberry	7,848	-5,013

10 TOPS · FIRST 8

Cass-Ernest E20N42-329-42633

0.1 KM · Pioneer Natural Res. USA, Inc. · Section with this well →

Santa Rosa	1,136	1,699
Yates	2,790	45
Seven Rivers	3,102	-267
Queen	3,859	-1,024
Grayburg	4,415	-1,580
San Andres	4,671	-1,836
Clear Fork	6,995	-4,160
Spraberry	7,849	-5,014

10 TOPS · FIRST 8

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

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