WELL · 42-013-36233 · DISTRICT 1
Griffin-Krueger SA4 #4H
Atascosa County · Eagleville (Eagle Ford-1) field · Producing · Horizontal
Griffin-Krueger Sa4 #4H (API 42-013-36233) is a horizontal well in Atascosa County operated by Marathon Oil EF LLC, completed January 1, 2026 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued April 24, 2025, permitted to 17,500 ft.
Completion filings report 10 formation tops, including Reklaw, Queen City, Carrizo, Wilcox.
Its lease has reported 129K barrels of oil and 131K mcf of gas since August 2025, 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 LLCApr 24, 2025 |
- 17,500
- total depth, ft
- 1
- permits on file
- Apr 24, 2025
- last permit issued
- Jan 1, 2026
- completed
- 129K
- cumulative oil, bbl
- 131K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Aug 2025 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- Jan 1, 2026
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
28.789163, -98.160814
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 |
|---|---|---|---|---|---|---|
| Griffin-Krueger SA4 O-1-21866 | Eagleville (Eagle Ford-1) | Marathon Oil EF LLC | 1 | 129K | 131K | Aug 2025 – Jul 2026 |
Oil, barrels lease total
Last 12 months 129,461 · prior 12 0
Gas, mcf lease total
Last 12 months 130,649 · prior 12 0
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCJan 2026 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 907566-99 | Drill | Marathon Oil EF LLC | Apr 22, 2025 | Apr 24, 2025 | Jul 16, 2025 | 17,500 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-1-21866 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 447 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Reklaw | 2,675 | -2,228 |
| Queen City | 2,679 | -2,232 |
| Reklaw | 3,675 | -3,228 |
| Carrizo | 3,974 | -3,527 |
| WilcoxWILCOX - DISPOSAL | 4,135 | -3,688 |
| OlmosOLMOS - DISPOSAL | 8,816 | -8,369 |
| Austin ChalkAUSTIN CHALK - H2S, DISPOSAL | 10,294 | -9,847 |
| AnacachoANACACHO - H2S | — | — |
| Bartosh | — | — |
| EscondidoESCONDIDO - H2S, DISPOSAL | — | — |
| NavarroNAVARRO - H2S | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 10,571 | 24,406 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,519 | 12.25 | 1,649 S |
| 5.5 | 24,449 | 8.75 | 4,562 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 10, 2026 | Aug 25, 2026 | — |
| 00 | May 27, 2026 | Apr 24, 2026 | Yes |
| 00 | Dec 11, 2025 | Dec 2, 2025 | 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 42-013-36233 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-013-36233 → 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.
Griffin-Krueger SA342-013-36232
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 2,661 | -2,215 |
| Reklaw | 3,669 | -3,223 |
| Carrizo | 3,971 | -3,525 |
| Wilcox | 4,114 | -3,668 |
| Olmos | 8,830 | -8,384 |
| Austin Chalk | 10,306 | -9,860 |
| Bartosh | — | |
| Navarro | — |
10 TOPS · FIRST 8
Griffin-Krueger SA242-013-36231
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Austin Chalk | 1,012 | -566 |
| Queen City | 2,649 | -2,203 |
| Reklaw | 3,666 | -3,220 |
| Carrizo | 3,954 | -3,508 |
| Wilcox | 4,118 | -3,672 |
| Olmos | 8,832 | -8,386 |
| Navarro | — | |
| Escondido | — |
10 TOPS · FIRST 8
Griffin-Krueger SA 142-013-36230
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 2,661 | -2,215 |
| Reklaw | 3,660 | -3,214 |
| Carrizo | 3,962 | -3,516 |
| Wilcox | 4,098 | -3,652 |
| Olmos | 8,826 | -8,380 |
| Austin Chalk | 10,310 | -9,864 |
| Navarro | — | |
| Anacacho | — |
10 TOPS · FIRST 8
Emma Tartt Tom #942-013-36168
0.4 KM · XTO Energy Inc. · Section with this well →
| Queen City | 2,603 | -2,145 |
| Reklaw | 3,817 | -3,359 |
| Carrizo | 3,845 | -3,387 |
| Wilcox | 4,603 | -4,145 |
| Bartosh | 5,080 | -4,622 |
| Navarro | 8,130 | -7,672 |
| Escondido | 8,201 | -7,743 |
| Olmos | 8,793 | -8,335 |
10 TOPS · FIRST 8
Emma Tartt Tom #842-013-36167
0.4 KM · XTO Energy Inc. · Section with this well →
| Queen City | 2,603 | -2,145 |
| Reklaw | 3,817 | -3,359 |
| Carrizo | 3,845 | -3,387 |
| Wilcox | 4,603 | -4,145 |
| Bartosh | 5,080 | -4,622 |
| Navarro | 8,130 | -7,672 |
| Escondido | 8,168 | -7,710 |
| Olmos | 8,777 | -8,319 |
10 TOPS · FIRST 8
Emma Tartt Tom #742-013-36166
0.4 KM · XTO Energy Inc. · Section with this well →
| Queen City | 2,603 | -2,145 |
| Reklaw | 3,817 | -3,359 |
| Carrizo | 3,845 | -3,387 |
| Wilcox | 4,603 | -4,145 |
| Bartosh | 5,080 | -4,622 |
| Navarro | 8,130 | -7,672 |
| Escondido | 8,206 | -7,748 |
| Olmos | 8,781 | -8,323 |
10 TOPS · FIRST 8
Emma Tartt Tom #642-013-36165
0.4 KM · XTO Energy Inc. · Section with this well →
| Queen City | 2,603 | -2,145 |
| Reklaw | 3,817 | -3,359 |
| Carrizo | 3,845 | -3,387 |
| Wilcox | 4,603 | -4,145 |
| Bartosh | 5,080 | -4,622 |
| Navarro | 8,130 | -7,672 |
| Escondido | 8,180 | -7,722 |
| Olmos | 8,778 | -8,320 |
14 TOPS · FIRST 8
Wsru Allocation AC42-013-35513
0.5 KM · XTO Energy Inc. · Section with this well →
| Queen City | 1,660 | -1,203 |
| Bartosh | 3,520 | -3,063 |
| Carrizo | 3,720 | -3,263 |
| Reklaw | 3,790 | -3,333 |
| Navarro | 6,150 | -5,693 |
| Wilcox | 6,200 | -5,743 |
| Escondido | 7,620 | -7,163 |
| Olmos | 8,825 | -8,368 |
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
Developers: this page as JSON is GET /v1/data/wells/01336233, documented in the API reference.