WELL · 42-165-31324 · DISTRICT 8
May Tom #21
Gaines County · G-M-K South (San Andres) field · Vertical
May Tom #21 (API 42-165-31324) is a disposal or injection well in Gaines County operated by Hilcorp Energy Company under an active UIC permit.
The RRC has issued one drilling permit, issued January 20, 1978, permitted to 5,600 ft.
It was permitted by Mobil Oil Corporation and has since transferred to Hilcorp Energy Company on the wellbore schedule.
Completion filings report 3 formation tops, including Yates, Grayburg, San Andres.
Its lease has reported 4.77M barrels of oil and 9.51M mcf of gas since January 1993, last reporting in July 2026. The lease carries 33 wells, so these are lease totals, not this well alone.
It holds an active disposal or injection permit, with 291K barrels injected in the 12 months reported through October 2025.
Operator of record
Permitted by Mobil Oil Corporation; the EWA schedule now lists a different operator.
Houston, TX · P-5 Y, filed Mar 26, 2026 · 3,453 permits on file · (713) 209-2411
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Hilcorp Energy Company |
| Production reports | OXY USA WTP LPthrough Apr 2026 |
| Latest permit | Mobil Oil CorporationJan 20, 1978 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 5,600
- total depth, ft
- 1
- permits on file
- Jan 20, 1978
- last permit issued
- —
- completed
- 4.77M
- cumulative oil, bbl
- 9.51M
- 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 lease this well is completed on; they carry 33 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| May, Tom O-11-61682 | G-M-K, South (San Andres) | Hilcorp Energy Company | 33 | 4.77M | 9.51M | Jan 1993 – Jul 2026 |
Gas, mcf lease total
Last 12 months 966,058 · prior 12 488,814(+98%)
Oil, barrels lease total
Last 12 months 39,757 · prior 12 37,227(+7%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Mobil Producing TX. & N.M. Inc.Jan 1993 → Oct 2003
- 2OXY USA WTP LPNov 2003 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 16764-99 | Drill | Mobil Oil Corporation | Jan 20, 1978 | Jan 20, 1978 | Feb 5, 1978 | 5,600 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-11-61682 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 3,207 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Yates | 3,284 | -77 |
| Grayburg | 4,585 | -1,378 |
| San Andres | 4,862 | -1,655 |
| San Andres | 4,865 | -1,658 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 5,377 | 5,385 | Perforated |
| 5,377 | 5,485 | Perforated |
| 5,390 | 5,394 | Perforated |
| 5,396 | 5,402 | Perforated |
| 5,406 | 5,413 | Perforated |
| 5,418 | 5,422 | Perforated |
| 5,429 | 5,438 | Perforated |
| 5,445 | 5,458 | Perforated |
| 5,470 | 5,476 | Perforated |
| 5,478 | 5,485 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 12.75 | 400 | 17.5 | 425 S |
| 12.75 | 400 | — | — |
| 8.625 | 2,200 | 11 | 1,000 S |
| 8.625 | 2,200 | — | — |
| 2.375 | 5,355 | — | — |
| 5.5 | 5,500 | 7.875 | 2,000 S |
| 5.5 | 5,550 | 7.875 | 2,000 S |
| 5.5 | 5,550 | — | — |
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 | Apr 26, 2024 | Jul 17, 2023 | — |
| 00 | May 10, 2005 | Oct 11, 2002 | — |
| 00 | Jan 12, 1984 | Sep 17, 1982 | — |
| 00 | Jan 12, 1984 | Feb 6, 1979 | — |
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 42-165-31324 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-165-31324 → scanned completion filings
Log images are in archives with no per-well link: the RRC's Neubus archive (2004 onward) and the University Lands library. then paste it into their search.
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Injection
- 291K
- bbl, last 12 reported months
- 11.2M
- bbl, all reported
- Oct 2025
- reported through
| UIC | Kind | Status | Permitted bbl/d | Max psi | Zone ft |
|---|---|---|---|---|---|
| 000023287 | H-1 Injection | Active | 5,000 | 2,600 | 5,200–5,800 |
MONTHLY INJECTED, BBL · H-10 · LAST 24 REPORTED MONTHS
Last 12 months 290,719 · prior 12 537,355(-46%)
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/16531324, documented in the API reference.