WELL · 42-255-36253 · DISTRICT 2
May-Ryan Unit a-B AC 1H Psa #1H
Karnes County · Sugarkane (Austin Chalk) field · Shut IN · Horizontal
May-Ryan Unit A-B AC 1h Psa #1H (API 42-255-36253) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed June 26, 2019 and listed as shut in on the RRC schedule.
The RRC has issued one drilling permit, issued December 31, 2018, permitted to 22,000 ft.
Completion filings report 10 formation tops, including Yegua, Queen City, Reklaw, Carrizo.
Its lease has reported 181 barrels of oil and 420 mcf of gas since March 2019, last reporting in July 2026.
Operator of record
- 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 Nov 2022 |
| Latest permit | Marathon Oil EF LLCDec 31, 2018 |
- 22,000
- total depth, ft
- 1
- permits on file
- Dec 31, 2018
- last permit issued
- Jun 26, 2019
- completed
- 181
- cumulative oil, bbl
- 420
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Mar 2019 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jun 26, 2019
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active (A)
Surface location
28.843672, -98.071303
Permit surface location from the RRC GIS record, in Karnes County.
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 a-B AC 1H Psa O-2-11731 | Sugarkane (Austin Chalk) | Marathon Oil EF LLC | 1 | 181 | 420 | Mar 2019 – 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.
- 1Marathon Oil EF LLCJun 2019 → Nov 2022
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 847445-99 | Drill | Marathon Oil EF LLC | Dec 4, 2018 | Dec 31, 2018 | May 28, 2019 | 22,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-2-11731 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 467 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| YeguaYEGUA - DISPOSAL | 1,142 | -675 |
| Queen City | 3,197 | -2,730 |
| Reklaw | 3,741 | -3,274 |
| Carrizo | 4,198 | -3,731 |
| WilcoxWILCOX - DISPOSAL | 5,519 | -5,052 |
| Austin ChalkAUSTIN CHALK - H2S | 10,685 | -10,218 |
| Eagle FordEAGLE FORD - H2S | — | — |
| EdwardsEDWARDS - H2S | — | — |
| FrioFRIO - DISPOSAL | — | — |
| SligoSLIGO - H2S | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,095 | 20,025 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,493 | 12.25 | 1,592 S |
| 5.5 | 20,124 | 8.75 | 3,872 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 | Oct 25, 2019 | Jul 15, 2019 | Yes |
| 00 | Jun 20, 2019 | May 23, 2019 | 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 42-255-36253 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-36253 → 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.
Nearby wells and their tops
NEAREST 8 LOCATED WELLS WITH TOPS · WITHIN 16 KM
Draw a cross-section
This well's tops beside its 5 nearest neighbors, subsea-aligned so they line up regardless of surface terrain.
May-Ryan Unit a-B 2H Psa42-255-36252
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,142 | -674 |
| Queen City | 3,197 | -2,729 |
| Reklaw | 3,741 | -3,273 |
| Carrizo | 4,198 | -3,730 |
| Wilcox | 5,519 | -5,051 |
| Austin Chalk | 10,683 | -10,215 |
| Eagle Ford | 10,905 | -10,437 |
| Sligo | — |
10 TOPS · FIRST 8
May-Ryan Unit a-B 4H Psa42-255-36250
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,142 | -677 |
| Queen City | 3,197 | -2,732 |
| Reklaw | 3,741 | -3,276 |
| Carrizo | 4,198 | -3,733 |
| Wilcox | 5,519 | -5,054 |
| Austin Chalk | 10,667 | -10,202 |
| Eagle Ford | 10,885 | -10,420 |
| Frio | — |
10 TOPS · FIRST 8
Franke-May-Ryan Unit a-B Alc42-255-36285
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,142 | -674 |
| Queen City | 3,197 | -2,729 |
| Reklaw | 3,741 | -3,273 |
| Carrizo | 4,198 | -3,730 |
| Wilcox | 5,519 | -5,051 |
| Austin Chalk | 10,667 | -10,199 |
| Eagle Ford | 10,888 | -10,420 |
| Frio | — |
10 TOPS · FIRST 8
May-Ryan Unit a-B 3H Psa42-255-36251
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,142 | -676 |
| Queen City | 3,197 | -2,731 |
| Reklaw | 3,741 | -3,275 |
| Carrizo | 4,198 | -3,732 |
| Wilcox | 5,519 | -5,053 |
| Austin Chalk | 10,676 | -10,210 |
| Eagle Ford | 10,897 | -10,431 |
| Sligo | — |
10 TOPS · FIRST 8
Whiteside Unit42-255-37112
0.5 KM · EOG Resources, Inc. · Section with this well →
| Yegua | 1,273 | -825 |
| Queen City | 2,431 | -1,983 |
| Reklaw | 3,370 | -2,922 |
| Wilcox | 4,140 | -3,692 |
| Carrizo | 4,141 | -3,693 |
| Austin Chalk | 10,720 | -10,272 |
| Eagle Ford | 10,829 | -10,381 |
| Sligo | — |
10 TOPS · FIRST 8
Whiteside Unit42-255-37113
0.5 KM · EOG Resources, Inc. · Section with this well →
| Yegua | 1,269 | -821 |
| Queen City | 2,427 | -1,979 |
| Reklaw | 3,366 | -2,918 |
| Wilcox | 4,136 | -3,688 |
| Carrizo | 4,137 | -3,689 |
| Austin Chalk | 10,721 | -10,273 |
| Eagle Ford | 10,826 | -10,378 |
| Edwards | — |
10 TOPS · FIRST 8
Whiteside Unit42-255-37114
0.5 KM · EOG Resources, Inc. · Section with this well →
| Yegua | 1,262 | -813 |
| Queen City | 2,420 | -1,971 |
| Reklaw | 3,359 | -2,910 |
| Wilcox | 4,129 | -3,680 |
| Carrizo | 4,130 | -3,681 |
| Austin Chalk | 10,728 | -10,279 |
| Eagle Ford | 10,834 | -10,385 |
| Edwards | — |
10 TOPS · FIRST 8
Whiteside Unit42-255-37115
0.5 KM · EOG Resources, Inc. · Section with this well →
| Yegua | 1,250 | -802 |
| Queen City | 2,408 | -1,960 |
| Reklaw | 3,347 | -2,899 |
| Wilcox | 4,117 | -3,669 |
| Carrizo | 4,118 | -3,670 |
| Austin Chalk | 10,737 | -10,289 |
| Eagle Ford | 10,848 | -10,400 |
| Frio | — |
10 TOPS · FIRST 8
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.
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