WELL · 42-507-33514 · DISTRICT 1

Pfeiffer-Byrd #1

Zavala County · Pearsall (Austin Chalk) field · Producing · Horizontal

Pfeiffer-Byrd #1 (API 42-507-33514) is a horizontal well in Zavala County operated by Cml Exploration LLC, completed December 13, 2023 and listed as producing on the RRC schedule.

The RRC has issued one drilling permit (amended once), issued October 17, 2023, permitted to 6,600 ft.

Completion filings report 3 formation tops, including Escondido, Olmos, Austin Chalk.

Its lease has reported 74.4K barrels of oil and 40.6K mcf of gas since December 2023, last reporting in July 2026.

Operator of record

CML Exploration LLC

Austin, TX · P-5 Y, filed Jul 4, 2026 · 514 permits on file · (800) 460-6313

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore schedule	CML Exploration LLC
Production reports	CML Exploration, LLCthrough Apr 2026
Latest permit	CML Exploration, LLCOct 17, 2023

6,600: total depth, ft
2: permits on file
Oct 17, 2023: last permit issued
Dec 13, 2023: completed
74.4K: cumulative oil, bbl
40.6K: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Dec 2023 THROUGH Jul 2026

Regulatory status · RRC wellbore file

Schedule: ON SCHEDULE
Completed: Dec 13, 2023
Shut in: —
Plugged: —

Operator's P-5 on the schedule: Active

Surface location

28.683120, -99.619074

OpenStreetMap → · Google Maps →

Permit surface location from the RRC GIS record, in Zavala 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
Pfeiffer-Byrd O-1-21246	Pearsall (Austin Chalk)	CML Exploration, LLC	1	74.4K	40.6K	Dec 2023 – Jul 2026

Oil, barrels lease total

Last 12 months 8,085 · prior 12 23,029(-65%)

Gas, mcf lease total

Last 12 months 4,029 · prior 12 25,768(-84%)

Chain of custody

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

1CML Exploration, LLCDec 2023 → Apr 2026

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
893786-98	Drill	CML Exploration, LLC	Nov 16, 2023	Oct 17, 2023	Oct 25, 2023	6,600
893786-99	Drill	CML Exploration, LLC	Sep 18, 2023	Oct 17, 2023	Oct 25, 2023	6,600

Completions

Completed	Lease	Field	Operator	Status	Depth
—	— O-1-21246	—	—	—	—

Formation tops

As filed on W-2/G-1. Subsea from 630 ft elevation.Download CSV →

Formation	MD ft	Subsea
EscondidoESCONDIDO - DISPOSAL	2,923	-2,293
Olmos	3,960	-3,330
Austin Chalk	5,801	-5,171

Perforations

Perforated and open-hole intervals.

From	To	Type
5,814	12,755	Open hole
5,814	14,513	Open hole
5,814	14,758	Open hole
5,814	15,150	Open hole
5,814	15,524	Open hole
5,814	15,849	Open hole

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
9.625	2,670	12.25	805 S
7	5,450	8.75	585 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	Feb 22, 2024	Feb 2, 2024	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 42-507-33514 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-507-33514 → 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 →

Aaron42-507-33346

0.7 KM · CML Exploration, LLC · Section with this well →

Escondido	2,946	-2,343
Olmos	3,987	-3,384
Anacacho	5,422	-4,819
Austin Chalk	5,867	-5,264
Buda	6,848	-6,245
Georgetown	7,150	-6,547

Buck42-507-33332

1.4 KM · CML Exploration, LLC · Section with this well →

Escondido	2,984	-2,387
Olmos	4,008	-3,411
Anacacho	5,429	-4,832
Austin Chalk	5,877	-5,280
Buda	6,879	-6,282
Georgetown	7,188	-6,591

J. Beeler42-507-33335

2.6 KM · CML Exploration, LLC · Section with this well →

Escondido	2,874	-2,240
Olmos	3,915	-3,281
Anacacho	5,341	-4,707
Austin Chalk	5,783	-5,149
Buda	6,823	-6,189
Georgetown	7,151	-6,517

J&M Holdsworth Zav42-507-33537

3.1 KM · Buffco Production Inc. · Section with this well →

Escondido	2,834	-2,223
Austin Chalk	5,766	-5,155
Eagle Ford	6,305	-5,694

J&M Holdsworth Zav42-507-33538

3.1 KM · Buffco Production Inc. · Section with this well →

Escondido	2,830	-2,219
Austin Chalk	5,754	-5,143
Eagle Ford	6,308	-5,697

J&M Holdsworth Zav42-507-33535

3.3 KM · Buffco Production Inc. · Section with this well →

Escondido	3,040	-2,446
Austin Chalk	5,612	-5,018
Eagle Ford	6,271	-5,677

J&M Holdsworth Zav42-507-33534

3.4 KM · Buffco Production Inc. · Section with this well →

Escondido	3,053	-2,459
Austin Chalk	5,588	-4,994
Eagle Ford	6,248	-5,654

Heitz42-507-33318

3.5 KM · CML Exploration, LLC · Section with this well →

Escondido	3,035	-2,485
Eagle Ford	6,645	-6,095
Pena Creek (Georgetown)	7,252	-6,702

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/50733514, documented in the API reference.