WELL · 42-039-31826 · DISTRICT 3

Lockhart Bank Unit 1 #4

Lockhart Bank Unit 1 #4 (API 42-039-31826) is a permitted well in Brazoria County filed by Calpine Natural Gas L.P.; no completion report is on file yet.

The RRC has issued 6 drilling permits between 1982 and 2002, permitted to 12,500 ft.

Completion filings report 7 formation tops, including 35 Sand, 36 Sand, 37 Sand, 38 Sand.

Its 5 leases have reported 269K barrels of oil and 1.43M mcf of gas since January 1993, last reporting in July 2026. The leases carry 7 wells, so these are lease totals, not this well alone.

Operator of record

Calpine Natural Gas L.P.

Houston, TX · P-5 Y, filed Dec 8, 2006 · 85 permits on file

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore schedule	none
Production reports	Drillmar Energy, Inc.through May 2014
Latest permit	Calpine Natural Gas L.P.Nov 1, 2002

12,500: total depth, ft
6: permits on file
Nov 1, 2002: last permit issued
—: completed
269K: cumulative oil, bbl
1.43M: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026

Regulatory status · RRC wellbore file

Schedule: OFF SCHEDULE
Completed: —
Shut in: —
Plugged: —

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 5 leases this well is completed on; they carry 7 wells in total, so volumes are shared.Why →

Lease	Field	Reporting operator	Wells	Oil, bbl	Gas, mcf	Reported
Lockhart Bank Oil Unit #3 O-3-16117	Alvin, South (#39)	Hockley Energy, Inc.	2	230K	338K	Jan 1993 – Jul 2026
Lockhart Bank Unit 1 G-3-205354	Alvin, South (#35)	Hockley Energy, Inc.	1	0	149K	Oct 2004 – Mar 2019
Lockhart Bank Unit No. 3 O-3-20075	Alvin, South (39 Seg. D)	Rosetta Resources Operating LP	2	39.2K	63.4K	Jan 1993 – Mar 2008
Lockhart Bank Unit 1 G-3-192749	Alvin, South (#37)	Cornerstone Energy, Inc.	1	0	88.5K	Sep 2001 – Oct 2004
Lockhart Bank Unit 1 G-3-169078	Alvin, South (#38)	Calpine Natural Gas Company	1	0	796K	Apr 1998 – Sep 2001

No volumes reported on these leases in the last three years.

Chain of custody

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

1Bridge Oil Company, L. P.Jan 1993 → Sep 1994
2Parker & Parsley Development L.POct 1994 → Jan 1995
3Parker & Parsley Producing L.P.Feb 1995 → Oct 1997
4Pioneer Resources Producing, L.PNov 1997 → Nov 1997
5Sheridan Energy,inc.Dec 1997 → Feb 2000
6Calpine Natural Gas CompanyMar 2000 → Apr 2002
7Calpine Natural Gas L.P.Sep 2001 → Oct 2003
8Calpine Natural Gas Company L.P.May 2002 → Jul 2002
9Cornerstone Energy, Inc.Nov 2003 → Jan 2008
10Drillmar Operating CompanyFeb 2008 → Aug 2011
11Caskids Operating CompanySep 2011 → Nov 2012
12Drillmar Energy, Inc.May 2014 → May 2014

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
525183-99	Recompletion	Calpine Natural Gas L.P.	Nov 1, 2002	Nov 1, 2002	—	9,640
513064-99	Recompletion	Calpine Natural Gas Company	Aug 28, 2001	Sep 18, 2001	Sep 18, 2001	9,640
477912-99	Recompletion	Sheridan Energy,inc.	Jul 14, 1998	Jul 23, 1998	Mar 6, 1998	9,775
372768-99	Recompletion	Bridge Oil Company, L. P.	Apr 30, 1990	Jun 4, 1990	—	10,348
178145-99	Drill	Superior Oil Company, The	Nov 5, 1982	Nov 5, 1982	—	12,500
155686-99	Drill	Superior Oil Company, The	Apr 6, 1982	Apr 6, 1982	—	12,500

Completions

Completed	Lease	Field	Operator	Status	Depth
—	— G-3-169078	—	—	—	—
—	— G-3-192749	—	—	—	—
—	— G-3-205354	—	—	—	—
—	— O-3-16117	—	—	—	—
—	— O-3-20075	—	—	—	—

Formation tops

As filed on W-2/G-1. Subsea from 39 ft elevation.Download CSV →

Formation	MD ft	Subsea
35 Sand	9,516	-9,477
36 Sand	9,578	-9,539
37 Sand	9,670	-9,631
38 Sand	9,706	-9,667
39 Sand	9,800	-9,761
40 Sand	9,977	-9,938
Previously Subitted	—	—

Perforations

Perforated and open-hole intervals.

From	To	Type
9,516	9,523	Perforated
9,578	9,582	Perforated
9,706	9,714	Perforated
9,826	9,829	Perforated
9,845	9,850	Perforated
9,872	9,874	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
10.75	2,480	14.75	1,950 S
2.875	9,588	—	—
7.625	10,307	9.875	2,150 S
7.625	10,307	—	2,150 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 →

Filed	W-2 / G-1 date	Logs referenced
Apr 7, 2005	Nov 18, 2004	Yes
Jan 13, 2005	—	—
Mar 18, 2003	Nov 5, 2002	Yes
Feb 12, 2003	—	—
Aug 7, 1998	Jun 12, 1998	Yes
Jul 30, 1998	—	—
Jul 29, 1991	Jul 9, 1990	Yes
Jul 16, 1991	—	—
Jan 12, 1984	Nov 8, 1982	—

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 42-039-31826 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-039-31826 → 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.

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/03931826, documented in the API reference.