WELL · 42-013-35828 · DISTRICT 1
Tom Family-Retzloff SA1 #1H
Atascosa County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Tom Family-Retzloff Sa1 #1H (API 42-013-35828) is a horizontal well in Atascosa County operated by Marathon Oil EF LLC, completed October 26, 2021 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued March 29, 2021, permitted to 26,000 ft.
Completion filings report 10 formation tops, including Queen City, Reklaw, Carrizo, Wilcox.
Its lease has reported 245K barrels of oil and 290K mcf of gas since May 2021, 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 LLCMar 29, 2021 |
- 26,000
- total depth, ft
- 1
- permits on file
- Mar 29, 2021
- last permit issued
- Oct 26, 2021
- completed
- 245K
- cumulative oil, bbl
- 290K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · May 2021 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Oct 26, 2021
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
28.751003, -98.180331
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 |
|---|---|---|---|---|---|---|
| Tom Family-Retzloff SA1 O-1-20437 | Eagleville (Eagle Ford-1) | Marathon Oil EF LLC | 1 | 245K | 290K | May 2021 – Jul 2026 |
Oil, barrels lease total
Last 12 months 32,097 · prior 12 39,354(-18%)
Gas, mcf lease total
Last 12 months 20,049 · prior 12 28,337(-29%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCAug 2021 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 868622-99 | Drill | Marathon Oil EF LLC | Mar 24, 2021 | Mar 29, 2021 | May 8, 2021 | 26,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-20437 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 419 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Queen City | 2,714 | -2,295 |
| Reklaw | 3,294 | -2,875 |
| Carrizo | 3,969 | -3,550 |
| WilcoxWILCOX - DISPOSAL | 4,044 | -3,625 |
| OlmosOLMOS - DISPOSAL | 9,054 | -8,635 |
| AnacachoANACACHO - H2S | 10,450 | -10,031 |
| Austin ChalkAUSTIN CHALK - H2S, DISPOSAL | 10,610 | -10,191 |
| Bartosh | — | — |
| EscondidoESCONDIDO - H2S, DISPOSAL | — | — |
| NavarroNAVARRO - H2S | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,903 | 17,735 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,358 | 12.25 | 1,531 S |
| 5.5 | 17,735 | 8.75 | 3,167 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 15, 2021 | Nov 30, 2021 | Yes |
| 00 | Oct 6, 2021 | Aug 31, 2021 | — |
| 00 | Jul 15, 2021 | Jun 28, 2021 | 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 42-013-35828 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-013-35828 → 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.
Tom Family-Retzloff SA242-013-35829
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 2,714 | -2,295 |
| Reklaw | 3,294 | -2,875 |
| Carrizo | 3,696 | -3,277 |
| Wilcox | 4,044 | -3,625 |
| Olmos | 9,054 | -8,635 |
| Anacacho | 10,445 | -10,026 |
| Austin Chalk | 10,608 | -10,189 |
| Escondido | — |
10 TOPS · FIRST 8
Tom Family-Retzloff SA342-013-35830
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 2,714 | -2,296 |
| Reklaw | 3,294 | -2,876 |
| Carrizo | 3,969 | -3,551 |
| Wilcox | 4,044 | -3,626 |
| Olmos | 9,054 | -8,636 |
| Anacacho | 10,449 | -10,031 |
| Austin Chalk | 10,612 | -10,194 |
| Escondido | — |
10 TOPS · FIRST 8
Retzloff-Tom Unit42-013-34409
0.5 KM · Marathon Oil EF LLC · Section with this well →
| Anacacho | 10,500 | -10,111 |
| Austin Chalk | 10,660 | -10,271 |
| Austin Chalk | 10,660 | -10,271 |
| Eagle Ford | 10,787 | -10,398 |
| Eagle Ford | 10,870 | -10,481 |
Retzloff May-Mauch Krueger SA42-013-35978
0.7 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 2,617 | -2,190 |
| Reklaw | 3,171 | -2,744 |
| Carrizo | 3,985 | -3,558 |
| Wilcox | 4,061 | -3,634 |
| Anacacho | 10,409 | -9,982 |
| Austin Chalk | 10,574 | -10,147 |
| Olmos | — | |
| Navarro | — |
10 TOPS · FIRST 8
Mauch Tom Krueger-Ethridge SA42-013-35977
0.7 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 1,791 | -1,389 |
| Reklaw | 3,171 | -2,769 |
| Carrizo | 3,895 | -3,493 |
| Wilcox | 4,061 | -3,659 |
| Anacacho | 10,408 | -10,006 |
| Austin Chalk | 10,571 | -10,169 |
| Navarro | — | |
| Escondido | — |
10 TOPS · FIRST 8
Mauch Tom Krueger SA242-013-35976
0.7 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 2,617 | -2,215 |
| Reklaw | 3,171 | -2,769 |
| Carrizo | 3,985 | -3,583 |
| Wilcox | 4,061 | -3,659 |
| Anacacho | 10,409 | -10,007 |
| Austin Chalk | 10,569 | -10,167 |
| Olmos | — | |
| Navarro | — |
10 TOPS · FIRST 8
Retzloff Tom-May Psa A42-013-35667
2.1 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
Retzloff Tom-May Psa B42-013-35668
2.1 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
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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