WELL · 42-013-36133 · DISTRICT 1
Retzloff-May-Tom SA1 #01H
Atascosa County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Retzloff-May-Tom Sa1 #01H (API 42-013-36133) is a horizontal well in Atascosa County operated by Marathon Oil EF LLC, completed May 21, 2024 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued January 26, 2024, permitted to 24,000 ft.
Completion filings report 10 formation tops, including Queen City, Reklaw, Carrizo, Wilcox.
Its lease has reported 353K barrels of oil and 453K mcf of gas since May 2024, last reporting in July 2026.
Operator of record
Houston, TX · P-5 Y, filed Aug 4, 2025 · 3,191 permits on file · (800) 332-9449
SOURCE · RRC EWA WELLBORE SCHEDULE
What each RRC source says
| Wellbore schedule | Marathon Oil EF LLC |
| Production reports | Marathon Oil EF LLCthrough Apr 2026 |
| Latest permit | Marathon Oil EF LLCJan 26, 2024 |
- 24,000
- total depth, ft
- 1
- permits on file
- Jan 26, 2024
- last permit issued
- May 21, 2024
- completed
- 353K
- cumulative oil, bbl
- 453K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · May 2024 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- May 21, 2024
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
28.734178, -98.170881
OpenStreetMap → · Google Maps →
Permit surface location from the RRC GIS record, in Atascosa 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 |
|---|---|---|---|---|---|---|
| Retzloff-May-Tom SA1 O-1-21496 | Eagleville (Eagle Ford-1) | Marathon Oil EF LLC | 1 | 353K | 453K | May 2024 – Jul 2026 |
Oil, barrels lease total
Last 12 months 95,707 · prior 12 257,539(-63%)
Gas, mcf lease total
Last 12 months 125,427 · prior 12 327,685(-62%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCMay 2024 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 896649-99 | Drill | Marathon Oil EF LLC | Jan 18, 2024 | Jan 26, 2024 | Feb 19, 2024 | 24,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-21496 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 359 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Queen City | 2,794 | -2,435 |
| Reklaw | 3,324 | -2,965 |
| Carrizo | 4,152 | -3,793 |
| WilcoxWILCOX - DISPOSAL | 4,224 | -3,865 |
| Austin ChalkAUSTIN CHALK - H2S, DISPOSAL | 10,917 | -10,558 |
| AnacachoANACACHO - H2S | — | — |
| Bartosh | — | — |
| EscondidoESCONDIDO - H2S, DISPOSAL | — | — |
| NavarroNAVARRO - H2S | — | — |
| OlmosOLMOS - DISPOSAL | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,163 | 22,090 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,174 | 12.25 | 1,286 S |
| 5.5 | 22,091 | 8.75 | 4,739 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 | Sep 24, 2024 | Aug 8, 2024 | 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 42-013-36133 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-013-36133 → 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 neighbours, subsea-aligned so they line up regardless of surface terrain.
Ethridge Unit A42-013-36131
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Cook Mountain | 1,939 | -1,580 |
| Queen City | 2,794 | -2,435 |
| Reklaw | 3,324 | -2,965 |
| Carrizo | 4,152 | -3,793 |
| Wilcox | 4,224 | -3,865 |
| Anacacho | 10,734 | -10,375 |
| Austin Chalk | 11,101 | -10,742 |
| Olmos | — |
11 TOPS · FIRST 8
Esse-Retzloff-May-Tom SA142-013-36132
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 2,794 | -2,435 |
| Reklaw | 3,324 | -2,965 |
| Carrizo | 4,152 | -3,793 |
| Wilcox | 4,224 | -3,865 |
| Anacacho | 10,743 | -10,384 |
| Austin Chalk | 10,922 | -10,563 |
| Escondido | — | |
| Olmos | — |
10 TOPS · FIRST 8
Ethridge Unit A42-013-36130
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 2,794 | -2,435 |
| Reklaw | 3,324 | -2,965 |
| Carrizo | 4,152 | -3,793 |
| Wilcox | 4,224 | -3,865 |
| Anacacho | 10,715 | -10,356 |
| Austin Chalk | 10,898 | -10,539 |
| Eagle Ford | 11,051 | -10,692 |
| Navarro | — |
14 TOPS · FIRST 8
Retzloff Tom-May Psa C42-013-35669
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 3,095 | -2,736 |
| Reklaw | 3,457 | -3,098 |
| Bartosh | 3,661 | -3,302 |
| Carrizo | 4,104 | -3,745 |
| Wilcox | 5,439 | -5,080 |
| Navarro | 8,777 | -8,418 |
| Olmos | 9,287 | -8,928 |
| Anacacho | 10,712 | -10,353 |
10 TOPS · FIRST 8
Retzloff Tom-May Psa B42-013-35668
0.1 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 3,095 | -2,737 |
| Reklaw | 3,457 | -3,099 |
| Bartosh | 3,661 | -3,303 |
| Carrizo | 4,104 | -3,746 |
| Wilcox | 5,439 | -5,081 |
| Navarro | 8,777 | -8,419 |
| Olmos | 9,287 | -8,929 |
| Escondido | 9,287 | -8,929 |
10 TOPS · FIRST 8
Retzloff Tom-May Psa A42-013-35667
0.1 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 3,095 | -2,738 |
| Reklaw | 3,457 | -3,100 |
| Bartosh | 3,661 | -3,304 |
| Carrizo | 4,104 | -3,747 |
| Wilcox | 5,439 | -5,082 |
| Navarro | 8,777 | -8,420 |
| Olmos | 9,287 | -8,930 |
| Anacacho | 10,713 | -10,356 |
10 TOPS · FIRST 8
JO Ann Esse Unit E42-297-36492
0.9 KM · Burlington Resources O & G Co LP · Section with this well →
| Frio | 102 | 262 |
| Hockley - Disposal | 499 | -135 |
| Jackson | 865 | -501 |
| Cook Mountain | 2,035 | -1,671 |
| Queen City | 2,927 | -2,563 |
| Wilcox | 4,439 | -4,075 |
| Austin Chalk | 10,958 | -10,594 |
| Eagle Ford | 11,053 | -10,689 |
10 TOPS · FIRST 8
JO Ann Esse Unit H42-297-36491
0.9 KM · Burlington Resources O & G Co LP · Section with this well →
| Frio | 103 | 262 |
| Hockley - Disposal | 499 | -134 |
| Jackson | 866 | -501 |
| Cook Mountain | 2,035 | -1,670 |
| Queen City | 2,924 | -2,559 |
| Wilcox | 4,440 | -4,075 |
| Austin Chalk | 10,961 | -10,596 |
| Eagle Ford | 11,056 | -10,691 |
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.
New to these records? How to read a well page · API numbers · completion reports and tops · why production is by lease
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