WELL · 42-255-37794 · DISTRICT 2
Turnbull a-D-E-R. Grande SA4 #4H
Karnes County · Eagleville (Eagle Ford-2) field · Producing · Horizontal
Turnbull A-D-E-R. Grande Sa4 #4H (API 42-255-37794) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed May 30, 2024 and listed as producing on the RRC schedule.
The RRC has issued one drilling permit, issued May 30, 2023, permitted to 24,000 ft.
Completion filings report 11 formation tops, including Austin Chalk, Queen City, Reklaw, Carrizo.
Its lease has reported 191K barrels of oil and 405K mcf of gas since September 2023, 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 LLCMay 30, 2023 |
- 24,000
- total depth, ft
- 1
- permits on file
- May 30, 2023
- last permit issued
- May 30, 2024
- completed
- 191K
- cumulative oil, bbl
- 405K
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Sep 2023 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- ON SCHEDULE
- Completed
- May 30, 2024
- Shut in
- —
- Plugged
- —
Operator's P-5 on the schedule: Active
Surface location
28.804231, -98.049389
OpenStreetMap → · Google Maps →
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 |
|---|---|---|---|---|---|---|
| Turnbull a-D-E-R. Grande SA4 O-2-12692 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | 1 | 191K | 405K | Sep 2023 – Jul 2026 |
Oil, barrels lease total
Last 12 months 27,815 · prior 12 94,276(-70%)
Gas, mcf lease total
Last 12 months 70,635 · prior 12 242,646(-71%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Marathon Oil EF LLCFeb 2024 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 890726-99 | Drill | Marathon Oil EF LLC | May 17, 2023 | May 30, 2023 | Aug 8, 2023 | 24,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — O-2-12692 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 399 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| Austin ChalkAUSTIN CHALK - H2S | 1,111 | -712 |
| Queen City | 3,557 | -3,158 |
| Reklaw | 4,214 | -3,815 |
| Carrizo | 4,447 | -4,048 |
| WilcoxWILCOX - DISPOSAL | 5,866 | -5,467 |
| Anacacho | 10,955 | -10,556 |
| Austin ChalkAUSTIN CHALK - H2S | 11,111 | -10,712 |
| Eagle FordEAGLE FORD - H2S | 11,287 | -10,888 |
| EdwardsEDWARDS - H2S | — | — |
| FrioFRIO - DISPOSAL | — | — |
| SligoSLIGO - H2S | — | — |
| YeguaYEGUA - DISPOSAL | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 11,457 | 19,549 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 5,572 | 12.25 | 1,360 S |
| 5.5 | 19,549 | 8.75 | 3,205 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 | Aug 23, 2024 | Aug 2, 2024 | — |
| 00 | Apr 4, 2024 | Mar 13, 2024 | — |
| 00 | Dec 27, 2023 | Dec 5, 2023 | 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 42-255-37794 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-37794 → 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.
Turnbull Unit a E-R. Grande SA342-255-37793
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 3,557 | -3,158 |
| Reklaw | 4,214 | -3,815 |
| Carrizo | 4,447 | -4,048 |
| Wilcox | 5,866 | -5,467 |
| Anacacho | 10,962 | -10,563 |
| Austin Chalk | 11,111 | -10,712 |
| Eagle Ford | 11,287 | -10,888 |
| Edwards | — |
11 TOPS · FIRST 8
Turnbull Unit a-D-R. Grande SA542-255-37795
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Queen City | 3,557 | -3,158 |
| Reklaw | 4,214 | -3,815 |
| Carrizo | 4,447 | -4,048 |
| Wilcox | 5,866 | -5,467 |
| Austin Chalk | 11,106 | -10,707 |
| Eagle Ford | 11,276 | -10,877 |
| Frio | — | |
| Edwards | — |
10 TOPS · FIRST 8
Turnbull Unit a-E SA242-255-37792
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Austin Chalk | 1,113 | -714 |
| Queen City | 3,557 | -3,158 |
| Reklaw | 4,214 | -3,815 |
| Carrizo | 4,447 | -4,048 |
| Wilcox | 5,866 | -5,467 |
| Anacacho | 10,979 | -10,580 |
| Eagle Ford | 11,313 | -10,914 |
| Yegua | — |
11 TOPS · FIRST 8
Turnbull Unit E42-255-36640
0.7 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,409 | -995 |
| Queen City | 3,547 | -3,133 |
| Reklaw | 4,272 | -3,858 |
| Carrizo | 4,597 | -4,183 |
| Wilcox | 6,191 | -5,777 |
| Austin Chalk | 11,139 | -10,725 |
| Eagle Ford | 11,319 | -10,905 |
| Frio | — |
10 TOPS · FIRST 8
Turnbull Unit E42-255-36641
0.7 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,409 | -996 |
| Queen City | 3,547 | -3,134 |
| Reklaw | 4,274 | -3,861 |
| Carrizo | 4,597 | -4,184 |
| Wilcox | 6,191 | -5,778 |
| Austin Chalk | 11,153 | -10,740 |
| Eagle Ford | 11,329 | -10,916 |
| Sligo | — |
10 TOPS · FIRST 8
Turnbull Unit E42-255-36642
0.7 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,409 | -996 |
| Queen City | 3,547 | -3,134 |
| Reklaw | 4,274 | -3,861 |
| Carrizo | 4,597 | -4,184 |
| Wilcox | 6,191 | -5,778 |
| Austin Chalk | 11,168 | -10,755 |
| Eagle Ford | 11,332 | -10,919 |
| Frio | — |
10 TOPS · FIRST 8
Ahlstrom Unit B42-255-32425
0.8 KM · Verdun Oil & Gas LLC · Section with this well →
| Pecan Gap | 10,893 | -10,444 |
| Austin Chalk | 11,066 | -10,617 |
| Eagle Ford | 11,194 | -10,745 |
Ahlstrom Unit A42-255-31986
1.0 KM · Verdun Oil & Gas LLC · Section with this well →
| Austin Chalk | 11,071 | -10,622 |
| Eagle Ford | 11,193 | -10,744 |
| Pecan Gap | 11,904 | -11,455 |
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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