WELL · 42-255-37364 · DISTRICT 2
Turnbull F-Kowalik SA1 #1H
Karnes County · Eagleville (Eagle Ford-2) field · Horizontal
Turnbull F-Kowalik Sa1 #1H (API 42-255-37364) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed October 23, 2022.
The RRC has issued one drilling permit, issued December 14, 2021, permitted to 26,000 ft.
Completion filings report 10 formation tops, including Queen City, Reklaw, Carrizo, Wilcox.
No lease production has been reported under this well’s leases.
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 Apr 2026 |
| Latest permit | Marathon Oil EF LLCDec 14, 2021 |
- 26,000
- total depth, ft
- 1
- permits on file
- Dec 14, 2021
- last permit issued
- Oct 23, 2022
- completed
- 0
- cumulative oil, bbl
- 919K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Mar 2022 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Oct 23, 2022
- Shut in
- —
- Plugged
- —
Surface location
28.808989, -98.026850
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 2 leases this well is completed on; they carry 2 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Turnbull F-Kowalik SA1 G-2-296270 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | 1 | 0 | 919K | Jun 2022 – Jul 2026 |
| Turnbull F-Kowalik SA1 O-2-12320 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | 1 | 0 | 0 | Mar 2022 – Apr 2024 |
Gas, mcf lease total
Last 12 months 86,655 · prior 12 132,771(-35%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCJun 2022 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 875175-99 | Drill | Marathon Oil EF LLC | Dec 9, 2021 | Dec 14, 2021 | Jan 9, 2022 | 26,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-2-296270 | — | — | — | — |
| — | — O-2-12320 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 439 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Queen City | 3,520 | -3,081 |
| Reklaw | 4,105 | -3,666 |
| Carrizo | 4,652 | -4,213 |
| WilcoxWILCOX - DISPOSAL | 4,739 | -4,300 |
| Austin ChalkAUSTIN CHALK - H2S | 11,290 | -10,851 |
| Eagle FordEAGLE FORD - H2S | 11,479 | -11,040 |
| EdwardsEDWARDS - H2S | — | — |
| FrioFRIO - DISPOSAL | — | — |
| SligoSLIGO - H2S | — | — |
| YeguaYEGUA - DISPOSAL | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,689 | 21,162 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,868 | 12.25 | 1,438 S |
| 6 | 21,162 | 8.75 | 3,545 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 | Feb 8, 2024 | Jan 22, 2024 | Yes |
| 00 | Dec 16, 2022 | Dec 15, 2022 | — |
| 00 | Jul 19, 2022 | Jun 16, 2022 | — |
| 00 | Apr 27, 2022 | Apr 5, 2022 | 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 42-255-37364 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-37364 → 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.
Turnbull F-Kowalik SA342-255-37363
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 3,520 | -3,081 |
| Reklaw | 4,105 | -3,666 |
| Carrizo | 4,652 | -4,213 |
| Wilcox | 4,739 | -4,300 |
| Austin Chalk | 11,276 | -10,837 |
| Eagle Ford | 11,462 | -11,023 |
| Sligo | — | |
| Frio | — |
10 TOPS · FIRST 8
Turnbull Unit F42-255-37365
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 3,520 | -3,082 |
| Reklaw | 4,105 | -3,667 |
| Carrizo | 4,652 | -4,214 |
| Wilcox | 4,739 | -4,301 |
| Austin Chalk | 11,315 | -10,877 |
| Eagle Ford | 11,489 | -11,051 |
| Sligo | — | |
| Yegua | — |
10 TOPS · FIRST 8
Turnbull Unit F42-255-37366
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 3,520 | -3,082 |
| Reklaw | 4,105 | -3,667 |
| Carrizo | 4,652 | -4,214 |
| Wilcox | 4,739 | -4,301 |
| Austin Chalk | 11,324 | -10,886 |
| Eagle Ford | 11,508 | -11,070 |
| Frio | — | |
| Sligo | — |
10 TOPS · FIRST 8
Turnbull Unit F42-255-37367
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 3,520 | -3,082 |
| Reklaw | 4,105 | -3,667 |
| Carrizo | 4,652 | -4,214 |
| Wilcox | 4,739 | -4,301 |
| Austin Chalk | 11,327 | -10,889 |
| Eagle Ford | 11,513 | -11,075 |
| Yegua | — | |
| Edwards | — |
10 TOPS · FIRST 8
Turnbull F-Imperial-Kowalik SA42-255-37368
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 3,520 | -3,082 |
| Reklaw | 4,105 | -3,667 |
| Carrizo | 4,652 | -4,214 |
| Wilcox | 4,739 | -4,301 |
| Austin Chalk | 11,340 | -10,902 |
| Eagle Ford | 11,512 | -11,074 |
| Frio | — | |
| Edwards | — |
10 TOPS · FIRST 8
Coy City Ranch Unit B42-255-35621
1.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,482 | -1,037 |
| Queen City | 3,615 | -3,170 |
| Reklaw | 4,272 | -3,827 |
| Carrizo | 4,505 | -4,060 |
| Wilcox | 5,924 | -5,479 |
| Austin Chalk | 11,223 | -10,778 |
| Eagle Ford | 11,392 | -10,947 |
| Sligo | — |
10 TOPS · FIRST 8
Coy City Ranch Unit B42-255-35622
1.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,482 | -1,037 |
| Queen City | 3,615 | -3,170 |
| Reklaw | 4,272 | -3,827 |
| Carrizo | 4,505 | -4,060 |
| Wilcox | 5,924 | -5,479 |
| Austin Chalk | 11,218 | -10,773 |
| Eagle Ford | 11,364 | -10,919 |
| Sligo | — |
10 TOPS · FIRST 8
Coy City Ranch Unit B42-255-35623
1.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,482 | -1,038 |
| Queen City | 3,615 | -3,171 |
| Reklaw | 4,272 | -3,828 |
| Carrizo | 4,505 | -4,061 |
| Wilcox | 5,924 | -5,480 |
| Austin Chalk | 11,214 | -10,770 |
| Eagle Ford | 11,383 | -10,939 |
| Edwards | — |
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/25537364, documented in the API reference.