TEXAS · WELLS · KARNES COUNTY · MAY-RYAN UNIT B LEASE · API 42-255-32165 · DISTRICT 02
May-Ryan Unit B #1H
Karnes County · Eagleville (Eagle Ford-2) field · Producing · Horizontal
May-Ryan Unit B #1H (API 42-255-32165) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed February 7, 2021 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued October 24, 2011, permitted to 11,013 ft.
It was permitted by Hilcorp Energy Company and has since transferred to Marathon Oil EF LLC on the wellbore schedule.
Completion filings report 4 formation tops, including Anacacho, Ananacho, Austin Chalk, Eagle Ford.
Its lease has reported 189K barrels of oil and 194K mcf of gas since February 2012, last reporting in July 2026.
Operator of record
Permitted by Hilcorp Energy Company; the EWA schedule now lists a different operator.
- Based in
- Houston, TX
- P-5 status
- Active (A)
- P-5 last filed
- Sep 26, 2025
- Permits on file
- 3,191
- Phone
- (832) 486-2737
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Marathon Oil EF LLC |
| Production reports | Marathon Oil EF LLCthrough Jul 2024 |
| Latest permit | Hilcorp Energy CompanyOct 24, 2011 |
The sources disagree, which usually means a transfer or a lease-level production filing by a different entity. Petrora goes with the schedule.
- 11,013
- total depth, ft
- 1
- permits on file
- Oct 24, 2011
- last permit issued
- Feb 7, 2021
- completed
- 189K
- cumulative oil, bbl
- 194K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Feb 2012 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Feb 7, 2021
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active – Extension (X)
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 |
|---|---|---|---|---|---|---|
| May-Ryan Unit B O-2-9916 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | 1 | 189K | 194K | Feb 2012 – Jul 2026 |
Oil, barrels lease total
Last 12 months 0 · prior 12 399(-100%)
Gas, mcf lease total
Last 12 months 0 · prior 12 1,569(-100%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCFeb 2012 → Jul 2024
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 726640-99 | Drill | Hilcorp Energy Company | Oct 19, 2011 | Oct 24, 2011 | Dec 20, 2011 | 13,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| Feb 7, 2021 | May-Ryan Unit B O-2-9916 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | Producing | 11,013 |
Formation tops
As filed on W-2/G-1. Subsea from 498 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Anacacho | 10,176 | -9,678 |
| Ananacho | 10,176 | -9,678 |
| Austin Chalk | 10,847 | -10,349 |
| Eagle Ford | 11,040 | -10,542 |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,522 | 15,174 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 10.75 | 5,574 | 13.5 | 2,340 S |
| 5.5 | 15,286 | 8.75 | 2,315 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 | Apr 16, 2024 | Apr 5, 2024 | — |
| 00 | Apr 16, 2021 | Feb 25, 2021 | — |
| 00 | Dec 19, 2018 | Dec 14, 2018 | — |
| 00 | Jan 24, 2017 | Jan 18, 2017 | — |
| 00 | Jan 13, 2017 | Jan 12, 2017 | — |
| 00 | May 1, 2012 | Feb 17, 2012 | Yes |
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 42-255-32165 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-32165 → 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/25532165, documented in the API reference.