WELL · 42-329-42540 · DISTRICT 8

Shackelford 33U #21H

Midland County · Spraberry (Trend Area) R 40 Exc field · Producing · Horizontal

Shackelford 33u #21H (API 42-329-42540) is a horizontal well in Midland County operated by Pioneer Natural Res. USA Inc., completed April 15, 2019 and listed as producing on the RRC schedule.

The RRC has issued one drilling permit, issued May 25, 2018, permitted to 10,350 ft.

Completion filings report 9 formation tops, including Santa Rosa, Yates, Seven Rivers, Queen.

Its lease has reported 478K barrels of oil and 1.54M mcf of gas since April 2019, last reporting in July 2026.

Operator of record

Pioneer Natural Res. USA Inc.

Spring, TX · P-5 Y, filed May 4, 2026 · 15,618 permits on file · (972) 598-8150

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.May 25, 2018

10,350: total depth, ft
1: permits on file
May 25, 2018: last permit issued
Apr 15, 2019: completed
478K: cumulative oil, bbl
1.54M: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Apr 2019 THROUGH Jul 2026

Regulatory status · RRC wellbore file

Schedule: ON SCHEDULE
Completed: Apr 15, 2019
Shut in: —
Plugged: —

Operator's P-5 on the schedule: Active

Surface location

31.831943, -101.829247

OpenStreetMap → · Google Maps →

Permit surface location from the RRC GIS record, in Midland County.

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
Shackelford 33U O-10-52183	Spraberry (Trend Area) R 40 Exc	Pioneer Natural Res. USA, Inc.	1	478K	1.54M	Apr 2019 – Jul 2026

Oil, barrels lease total

Last 12 months 22,698 · prior 12 21,021(+8%)

Gas, mcf lease total

Last 12 months 109,120 · prior 12 155,751(-30%)

Chain of custody

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

1Pioneer Natural Res. USA, Inc.Apr 2019 → Apr 2026

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
840384-99	Drill	Pioneer Natural Res. USA, Inc.	May 23, 2018	May 25, 2018	Sep 14, 2018	10,350

Completions

Completed	Lease	Field	Operator	Status	Depth
—	— O-10-52183	—	—	—	—

Formation tops

As filed on W-2/G-1. Subsea from 2,653 ft elevation.Download CSV →

Formation	MD ft	Subsea
Santa Rosa	1,010	1,643
Yates	2,484	169
Seven Rivers	2,793	-140
Queen	3,407	-754
Grayburg	3,932	-1,279
San AndresSAN ANDRES - HIGH FLOWS, H2S, CO	4,143	-1,490
Clear ForkCLEARFORK	6,114	-3,461
Spraberry	7,039	-4,386
SpraberrySPRABERRY UPPER-DEAN	8,416	-5,763
Glorieta	—	—

Perforations

Perforated and open-hole intervals.

From	To	Type
10,571	20,434	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
13.375	1,401	17.5	1,425 S
9.625	6,317	12.25	1,167 S
5.5	20,464	6.75	1,759 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	Sep 25, 2019	Jul 2, 2019	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 42-329-42540 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-329-42540 → 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.

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 neighbours, subsea-aligned so they line up regardless of surface terrain.

Open the cross-section →

Shackelford42-329-42547

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

Santa Rosa	472	2,181
Yates	2,473	180
Seven Rivers	2,801	-148
Queen	3,482	-829
Grayburg	3,926	-1,273
San Andres	4,116	-1,463
Clear Fork	6,131	-3,478
Spraberry	7,037	-4,384

10 TOPS · FIRST 8

Shackelford42-329-42548

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

Santa Rosa	494	2,159
Yates	2,483	170
Seven Rivers	2,795	-142
Queen	3,410	-757
Grayburg	3,910	-1,257
San Andres	4,121	-1,468
Clear Fork	6,062	-3,409
Spraberry	7,035	-4,382

10 TOPS · FIRST 8

Shackelford42-329-42560

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

Santa Rosa	1,020	1,631
Yates	2,497	154
Seven Rivers	2,824	-173
Queen	3,434	-783
Grayburg	3,847	-1,196
San Andres	4,208	-1,557
Clear Fork	6,116	-3,465
Spraberry	7,081	-4,430

10 TOPS · FIRST 8

Shackelford42-329-42561

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

Santa Rosa	1,028	1,623
Yates	2,498	153
Seven Rivers	2,821	-170
Queen	3,438	-787
Grayburg	3,837	-1,186
San Andres	4,189	-1,538
Clear Fork	6,105	-3,454
Spraberry	7,074	-4,423

10 TOPS · FIRST 8

Shackelford42-329-42562

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

Santa Rosa	1,010	1,641
Yates	2,487	164
Seven Rivers	2,807	-156
Queen	3,424	-773
Grayburg	3,841	-1,190
San Andres	4,185	-1,534
Clear Fork	6,098	-3,447
Spraberry	7,061	-4,410

10 TOPS · FIRST 8

Shackelford W39B42-329-43069

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

Santa Rosa	1,004	1,648
Yates	2,504	148
Seven Rivers	2,826	-174
Queen	3,509	-857
San Andres	4,191	-1,539
Clear Fork	6,153	-3,501
Spraberry	7,066	-4,414
Spraberry	8,440	-5,788

10 TOPS · FIRST 8

Shackelford W39C42-329-43070

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

Santa Rosa	1,240	1,412
Yates	2,500	152
Seven Rivers	2,822	-170
Queen	3,497	-845
Grayburg	3,826	-1,174
San Andres	3,988	-1,336
Clear Fork	6,142	-3,490
Spraberry	7,059	-4,407

11 TOPS · FIRST 8

Shackelford W39A42-329-43067

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

Santa Rosa	978	1,674
Yates	2,416	236
Seven Rivers	2,510	142
Queen	2,831	-179
Grayburg	3,828	-1,176
San Andres	3,976	-1,324
Clear Fork	6,164	-3,512
Spraberry	7,071	-4,419

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

Developers: this page as JSON is GET /v1/data/wells/32942540, documented in the API reference.