TEXAS · WELLS · HOWARD COUNTY · CHAPARRAL UNIT A1 LEASE · API 42-227-40778 · DISTRICT 7B

Chaparral Unit A1 #8AH

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

Chaparral Unit A1 #8AH (API 42-227-40778) is a horizontal well in Howard County operated by Apache Corporation, completed May 2, 2021 and listed as producing on the RRC schedule.

The RRC has issued one drilling permit (amended once), issued September 17, 2020, permitted to 8,439 ft.

It was permitted by Callon Petroleum Operating CO and has since transferred to Apache Corporation on the wellbore schedule.

Completion filings report 10 formation tops, including Santa Rosa, Yates, Seven Rivers, San Andres.

Its lease has reported 1.19M barrels of oil and 1.58M mcf of gas since May 2021, last reporting volume in April 2026. The lease carries 3 wells, so these are lease totals, not this well alone.

Operator of record

Apache Corporation

Permitted by Callon Petroleum Operating Co; the EWA schedule now lists a different operator.

Based in: Houston, TX
P-5 status: Active (A)
P-5 last filed: Dec 3, 2025
Permits on file: 9,758
Phone: (713) 954-5500

Watch this operator Watch Howard County

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore schedule	Apache Corporation
Production reports	Apache Corporationthrough Apr 2026
Latest permit	Callon Petroleum Operating CoSep 17, 2020

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

8,439: total depth, ft
2: permits on file
Sep 17, 2020: last permit issued
May 2, 2021: completed
1.19M: cumulative oil, bbl
1.58M: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · May 2021 THROUGH Apr 2026

Regulatory status · RRC wellbore file

Schedule: ON SCHEDULE
Completed: May 2, 2021
Shut in: —
Plugged: —

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

Surface location

32.496766, -101.674025 NAD27, as filed

32.496877, -101.674438 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 Howard County.

Wells nearby

Withinmiles

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

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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; they carry 3 wells in total, so volumes are shared.Why →

Lease	Field	Reporting operator	Wells	Oil, bbl	Gas, mcf	Reported
Chaparral Unit A1 O-10-56293	Spraberry (Trend Area)	Apache Corporation	3	1.19M	1.58M	May 2021 – Apr 2026

Oil, barrels lease total

Last 12 months 52,835 · prior 12 73,204(-28%)

Gas, mcf lease total

Last 12 months 145,481 · prior 12 101,403(+43%)

Chain of custody

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

1Callon Petroleum Operating CoMay 2021 → Jul 2024
2Apache CorporationAug 2024 → Apr 2026

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
864996-98	Drill	Callon Petroleum Operating Co	Nov 4, 2020	Sep 17, 2020	Nov 23, 2020	8,950
864996-99	Drill	Callon Petroleum Operating Co	Sep 8, 2020	Sep 17, 2020	Nov 23, 2020	8,950

Completions

Completed	Lease	Field	Operator	Status	Depth
May 2, 2021	Chaparral Unit A1 O-10-56293	Spraberry (Trend Area)	Apache Corporation	Producing	8,439

Formation tops

As filed on W-2/G-1. Download CSV →

Formation	MD ft
Santa Rosa	1,050
Yates	2,105
Seven Rivers	2,218
San AndresSAN ANDRES - HIGH FLOWS, H2S, CO	3,396
Glorieta	4,560
Clear ForkCLEARFORK - SEVERE WATER FLOWS	5,985
Spraberry	6,771
Leonard	7,747
Dean	8,057
Rustler	—

Perforations

Perforated and open-hole intervals.

From	To	Type
8,709	19,775	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
13.375	1,359	17.5	927 S
9.625	7,757	12.25	517 S
5.5	19,953	8.5	3,259 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	Nov 19, 2021	Oct 25, 2021	Yes

Well logs

1 log loaded from the RRC's log index, 1 of it with a digital LAS file, the latest received Dec 19, 2023. Gamma ray. 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
Gamma RaySpans Santa Rosa, Yates, Seven Rivers, San Andres, Glorieta, Clear Fork, Spraberry, Leonard, Dean	LAS + TIFF	1,299 to 19,948	Dec 19, 2023	2.39 + 25.2

"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.

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 42-227-40778 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-227-40778 → scanned completion filings

The logs loaded for this well are under Well logs, with the RRC's log search for it.

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 →

Chaparral Unit A142-227-40779

0.0 KM · Callon Petroleum Operating Co · Section with this well →

Santa Rosa	1,050
Yates	2,100
Seven Rivers	2,231
San Andres	3,403
Glorieta	4,554
Clear Fork	5,989
Spraberry	6,780
Leonard	7,739

10 TOPS · FIRST 8

Chaparral Unit A142-227-40780

0.0 KM · Callon Petroleum Operating Co · Section with this well →

Santa Rosa	1,050
Yates	2,105
Seven Rivers	2,220
San Andres	3,401
Glorieta	4,557
Clear Fork	5,992
Spraberry	6,781
Leonard	7,753

10 TOPS · FIRST 8

Silver City Unit42-227-39411

1.3 KM · Callon Petroleum Operating Co · Section with this well →

Yates	2,090
Seven Rivers	2,190
San Andres	3,500
Glorieta	4,440
Clear Fork	5,990
Spraberry	6,745
Leonard	7,755
Dean	8,083

10 TOPS · FIRST 8

Silver City Unit42-227-39409

1.3 KM · Callon Petroleum Operating Co · Section with this well →

Yates	2,090
Seven Rivers	2,190
San Andres	3,500
Glorieta	4,440
Clear Fork	5,990
Spraberry	6,745
Leonard	7,765
Dean	8,073

10 TOPS · FIRST 8

Silver City Unit42-227-39410

1.3 KM · Callon Petroleum Operating Co · Section with this well →

Yates	2,090
Seven Rivers	2,190
San Andres	3,500
Glorieta	4,440
Clear Fork	5,990
Spraberry	6,745
Leonard	7,760
Dean	8,083

10 TOPS · FIRST 8

Adams H42-227-40875

1.5 KM · OXY USA Inc. · Section with this well →

Rustler	1,494	1,261
Yates	2,109	646
Seven Rivers	2,272	483
San Andres	3,526	-771
Glorieta	4,506	-1,751
Clear Fork	4,743	-1,988
Spraberry	6,760	-4,005
Santa Rosa	—

10 TOPS · FIRST 8

Adams H42-227-40876

1.5 KM · OXY USA Inc. · Section with this well →

Rustler	1,489	1,266
Yates	2,120	635
Seven Rivers	2,283	472
San Andres	3,526	-771
Glorieta	4,509	-1,754
Clear Fork	4,751	-1,996
Spraberry	6,758	-4,003
Dean	—

10 TOPS · FIRST 8

Adams H42-227-40874

1.5 KM · OXY USA Inc. · Section with this well →

Rustler	1,505	1,250
Yates	2,125	630
Seven Rivers	2,277	478
San Andres	3,526	-771
Glorieta	4,536	-1,781
Clear Fork	4,755	-2,000
Spraberry	6,783	-4,028
Santa Rosa	—

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/22740778, documented in the API reference.