WELL · 42-201-31315 · DISTRICT 3

Mason #12

Plugged

Harris County · Humble field · Vertical

Mason #12 (API 42-201-31315) is a plugged well in Harris County, plugged December 1, 2025, last operated by LT Oil LLC.

The RRC has issued one drilling permit, issued November 9, 1981, permitted to 1,150 ft.

It was permitted by Vicksburg Oil Corp. and has since transferred to LT Oil LLC on the wellbore schedule.

Its lease has reported 24.6K barrels of oil and 43 mcf of gas since January 1993, last reporting in July 2026. The lease carries 12 wells, so these are lease totals, not this well alone.

Operator of record

LT Oil LLC

Permitted by Vicksburg Oil Corp.; the EWA schedule now lists a different operator.

San Marcos, TX · P-5 Y, filed Apr 4, 2026 · (512) 878-3513

SOURCE · RRC EWA WELLBORE SCHEDULE

What each RRC source says

Wellbore schedule	LT Oil LLC
Production reports	LT Oil LLCthrough Nov 2020
Latest permit	Vicksburg Oil Corp.Nov 9, 1981

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

1,150: total depth, ft
1: permits on file
Nov 9, 1981: last permit issued
Nov 24, 1981: completed
24.6K: cumulative oil, bbl
43: cumulative gas, mcf

PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026

Regulatory status · RRC wellbore file

Schedule: OFF SCHEDULE
Completed: Nov 24, 1981
Shut in: —
Plugged: Dec 1, 2025

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 lease this well is completed on; they carry 12 wells in total, so volumes are shared.Why →

Lease	Field	Reporting operator	Wells	Oil, bbl	Gas, mcf	Reported
Mason O-3-7110	Humble	LT Oil LLC	12	24.6K	43	Jan 1993 – Jul 2026

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.

1J.R. Oil CompanyJan 1993 → Jan 1993
2Atascocita Oil CorporationFeb 1993 → Nov 1995
3Sullivan, M. A. CorporationDec 1995 → Jul 2000
4BB & L, LLCAug 2000 → Sep 2002
5Texana Operating CompanyOct 2002 → Jun 2019
6LT Oil LLCAug 2019 → Nov 2020

Permits

Permit	Type	Operator	Received	Issued	Spud	Depth
140134-99	Drill	Vicksburg Oil Corp.	Nov 9, 1981	Nov 9, 1981	—	1,150

Completions

Completed	Lease	Field	Operator	Status	Depth
—	— O-3-7110	—	—	—	—

Perforations

Perforated and open-hole intervals.

From	To	Type
984	1,002	Perforated

Casing

Strings as reported, shallowest first.

Casing in	Set at	Hole in	Cement
2.375	962	—	—
4.5	1,114	7.875	180 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	Jan 12, 1984	Dec 4, 1981	—

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 42-201-31315 → W-2, G-1, plugging reports, as PDFs
Completion packets for 42-201-31315 → 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/20131315, documented in the API reference.