WELL · 42-205-30275 · DISTRICT 10
Lathem Mary K Unit #1
Hartley County · Lathem (Canyon Granite Wash) field · Injection · Vertical
Lathem Mary K Unit #1 (API 42-205-30275) is a well in Hartley County operated by High River Res Operating LLC, completed November 12, 2024 and listed as injection on the RRC schedule.
The RRC has issued one drilling permit, issued September 3, 1996, permitted to 6,600 ft.
It was permitted by Rio Petroleum, Inc. and has since transferred to High River Res Operating LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Virgil, Virgil Lime, Pennsylvanian, Lefty Lm.
Its lease has reported 67K barrels of oil since December 1996, last reporting in July 2026.
It holds an active disposal or injection permit, with 841K barrels injected in the 12 months reported through January 2026.
Operator of record
Permitted by Rio Petroleum, Inc.; the EWA schedule now lists a different operator.
Dallas, TX · P-5 Y, filed Jul 4, 2026 · 6 permits on file · (713) 824-5449
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | High River Res Operating LLC |
| Production reports | Rio Petroleum, Inc.through Sep 2023 |
| Latest permit | Rio Petroleum, Inc.Sep 3, 1996 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 6,600
- total depth, ft
- 1
- permits on file
- Sep 3, 1996
- last permit issued
- Nov 12, 2024
- completed
- 67K
- cumulative oil, bbl
- 0
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Dec 1996 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Nov 12, 2024
- 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; this well is the only one on it.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Lathem Mary K Unit O-14-7174 | Lathem (Canyon Granite Wash) | High River Res Operating, LLC | 1 | 67K | 0 | Dec 1996 – Jul 2026 |
Oil, barrels lease total
Last 12 months 0 · prior 12 0
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Exxon Corp.Jan 1997 → Mar 2000
- 2Exxon Mobil CorporationApr 2000 → May 2008
- 3Rio Petroleum, Inc.Jun 2008 → Sep 2023
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 452150-99 | Drill | Rio Petroleum, Inc. | Sep 3, 1996 | Sep 3, 1996 | Oct 17, 1996 | 6,600 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-14-7174 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 3,929 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Virgil | 4,870 | -941 |
| Virgil Lime | 4,870 | -941 |
| PennsylvanianPENN SHALE | 5,715 | -1,786 |
| Pennsylvanian | 5,715 | -1,786 |
| Lefty LM | 6,220 | -2,291 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 6,358 | 6,363 | Perforated |
| 6,358 | 6,370 | Perforated |
| 6,373 | 6,378 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 13.375 | 707 | 17.5 | 575 S |
| 8.625 | 1,170 | 12.25 | 550 S |
| 8.625 | 2,015 | 12.25 | 550 S |
| 5.5 | 6,500 | 7.875 | 310 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 | Dec 16, 2024 | Nov 18, 2024 | — |
| 00 | Feb 28, 1997 | Jan 21, 1997 | Yes |
| 00 | Feb 20, 1997 | — | — |
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 42-205-30275 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-205-30275 → 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
- 841K
- bbl, last 12 reported months
- 841K
- bbl, all reported
- Jan 2026
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000118445 | H-1 Injection | Active | 6,000 | 1,500 | 6,358–6,500 |
MONTHLY INJECTED, BBL · H-10 · LAST 12 REPORTED MONTHS
Last 12 months 840,514
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/20530275, documented in the API reference.