WELL · 42-401-30919 · DISTRICT 6
Mason T. O. #31W
Rusk County · East Texas field · Injection · Vertical
Mason T. O. #31W (API 42-401-30919) is a well in Rusk County operated by Basa Resources Inc., completed September 6, 1985 and listed as injection on the RRC schedule.
The RRC has issued one drilling permit, issued January 24, 1980, permitted to 3,900 ft.
It was permitted by Mobil Producing TX. & N.M. Inc. and has since transferred to Basa Resources Inc. on the wellbore schedule.
Its lease has reported 364K barrels of oil and 9.29K mcf of gas since January 1993, last reporting in July 2026. The lease carries 30 wells, so these are lease totals, not this well alone.
It holds an active disposal or injection permit, with 178K barrels injected in the 12 months reported through November 2025.
Operator of record
Permitted by Mobil Producing TX. & N.M. Inc.; the EWA schedule now lists a different operator.
Dallas, TX · P-5 Y, filed Dec 4, 2025 · 472 permits on file · (214) 886-5398
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Basa Resources Inc. |
| Production reports | Basa Resources, Inc.through Apr 2026 |
| Latest permit | Mobil Producing TX. & N.M. Inc.Jan 24, 1980 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 3,900
- total depth, ft
- 1
- permits on file
- Jan 24, 1980
- last permit issued
- Sep 6, 1985
- completed
- 364K
- cumulative oil, bbl
- 9.29K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jan 1993 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Sep 6, 1985
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
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 30 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Mason, T. O. O-7-8152 | East Texas | Basa Resources, Inc. | 30 | 364K | 9.29K | Jan 1993 – Jul 2026 |
Oil, barrels lease total
Last 12 months 5,474 · prior 12 5,157(+6%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Mobil Producing TX. & N.M. Inc.Jan 1993 → May 1997
- 2Basa Resources, Inc.Jun 1997 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 70744-99 | Drill | Mobil Producing TX. & N.M. Inc. | Jan 24, 1980 | Jan 24, 1980 | Apr 27, 1980 | 3,900 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-7-8152 | — | — | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 3,628 | 3,736 | Perforated |
| 3,638 | 3,650 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 1,200 | 14.75 | 900 S |
| 10.75 | 1,200 | — | — |
| 2.375 | 3,618 | — | — |
| 7 | 3,630 | 9.875 | 585 S |
| 7 | 3,630 | — | — |
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 | Oct 31, 1985 | Sep 23, 1985 | — |
| 00 | Jan 12, 1984 | Aug 14, 1980 | — |
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 42-401-30919 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-401-30919 → 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.
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Injection
- 178K
- bbl, last 12 reported months
- 12.4M
- bbl, all reported
- Nov 2025
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000006449 | H-1 Injection | Active | 1,500 | 1,500 | 3,628–3,736 |
MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS
Last 12 months 177,840 · prior 12 176,470(+1%)
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/40130919, documented in the API reference.