WELL · 42-255-37046 · DISTRICT 2
Best-Fenner Unit #6H
Karnes County · Eagleville (Eagle Ford-2) field · Horizontal
Best-Fenner Unit #6H (API 42-255-37046) is a horizontal well in Karnes County operated by Marathon Oil EF LLC, completed September 14, 2021.
The RRC has issued one drilling permit (amended once), issued November 30, 2020, permitted to 21,000 ft.
Completion filings report 10 formation tops, including Yegua, Queen City, Reklaw, Carrizo.
Its 2 leases have reported 584K barrels of oil and 2.1M mcf of gas since June 2011, last reporting in July 2026. The leases carry 8 wells, so these are lease totals, not this well alone.
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 LLCNov 30, 2020 |
- 21,000
- total depth, ft
- 2
- permits on file
- Nov 30, 2020
- last permit issued
- Sep 14, 2021
- completed
- 584K
- cumulative oil, bbl
- 2.1M
- cumulative gas, mcf
PRODUCTION FROM PDQ LEASE REPORTS · Jun 2011 THROUGH Jul 2026
Regulatory status · RRC wellbore file
- Schedule
- OFF SCHEDULE
- Completed
- Sep 14, 2021
- Shut in
- —
- Plugged
- —
Surface location
28.817411, -98.013600
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 8 wells in total, so volumes are shared.Why →
| Lease | Field | Reporting operator | Wells | Oil, bbl | Gas, mcf | Reported |
|---|---|---|---|---|---|---|
| Best-Fenner Unit G-2-295623 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | 1 | 0 | 667K | Sep 2021 – Jul 2026 |
| Best-Fenner Unit O-2-9812 | Eagleville (Eagle Ford-2) | Marathon Oil EF LLC | 7 | 584K | 1.43M | Jun 2011 – Jul 2026 |
Gas, mcf lease total
Last 12 months 61,058 · prior 12 75,052(-19%)
Oil, barrels lease total
Last 12 months 11,268 · prior 12 7,165(+57%)
Chain of custody
Every operator that reported production on this well's lease, in order.
- 1Hilcorp Energy CompanyJul 2011 → Oct 2011
- 2Marathon Oil EF LLCNov 2011 → Apr 2026
Permits
| Permit | Type | Operator | Received | Issued | Spud | Depth |
|---|---|---|---|---|---|---|
| 866178-98 | Drill | Marathon Oil EF LLC | Oct 28, 2021 | Nov 30, 2020 | Jan 11, 2021 | 21,000 |
| 866178-99 | Drill | Marathon Oil EF LLC | Nov 20, 2020 | Nov 30, 2020 | Jan 11, 2021 | 21,000 |
Completions
| Completed | Lease | Field | Operator | Status | Depth |
|---|---|---|---|---|---|
| — | — G-2-295623 | — | — | — | — |
| — | — O-2-9812 | — | — | — | — |
Formation tops
As filed on W-2/G-1. Subsea from 480 ft elevation.Download CSV →
| Formation | MD ft | Subsea |
|---|---|---|
| YeguaYEGUA - DISPOSAL | 1,698 | -1,218 |
| Queen City | 3,799 | -3,319 |
| Reklaw | 4,383 | -3,903 |
| Carrizo | 4,736 | -4,256 |
| WilcoxWILCOX - DISPOSAL | 6,340 | -5,860 |
| Austin ChalkAUSTIN CHALK - H2S | 11,397 | -10,917 |
| Eagle FordEAGLE FORD - H2S | 11,588 | -11,108 |
| EdwardsEDWARDS - H2S | — | — |
| FrioFRIO - DISPOSAL | — | — |
| SligoSLIGO - H2S | — | — |
Perforations
Perforated and open-hole intervals.
| From | To | Type |
|---|---|---|
| 12,041 | 18,800 | Perforated |
Casing
Strings as reported, shallowest first.
| Casing in | Set at | Hole in | Cement |
|---|---|---|---|
| 9.625 | 6,104 | 12.25 | 1,535 S |
| 5.5 | 18,800 | 8.064 | 3,433 S |
| 5.5 | 18,800 | 8.75 | 3,433 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 28, 2023 | Aug 31, 2023 | Yes |
| 00 | Nov 19, 2021 | Oct 8, 2021 | — |
| 00 | Mar 17, 2021 | Feb 12, 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 42-255-37046 → W-2, G-1, plugging reports, as PDFs
- Completion packets for 42-255-37046 → 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.
Best-Fenner Unit42-255-37045
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,698 | -1,218 |
| Queen City | 3,799 | -3,319 |
| Reklaw | 4,383 | -3,903 |
| Carrizo | 4,736 | -4,256 |
| Wilcox | 6,340 | -5,860 |
| Austin Chalk | 11,415 | -10,935 |
| Eagle Ford | 11,606 | -11,126 |
| Frio | — |
10 TOPS · FIRST 8
Butler-Huth-Scheele SA42-255-37043
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,698 | -1,218 |
| Queen City | 3,799 | -3,319 |
| Reklaw | 4,383 | -3,903 |
| Carrizo | 4,736 | -4,256 |
| Wilcox | 6,340 | -5,860 |
| Austin Chalk | 11,416 | -10,936 |
| Eagle Ford | 11,590 | -11,110 |
| Edwards | — |
10 TOPS · FIRST 8
Butler-Fenner-St. Germaine SA42-255-37044
0.0 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 1,698 | -1,218 |
| Queen City | 3,799 | -3,319 |
| Reklaw | 4,383 | -3,903 |
| Carrizo | 4,736 | -4,256 |
| Wilcox | 6,340 | -5,860 |
| Austin Chalk | 11,399 | -10,919 |
| Eagle Ford | 11,585 | -11,105 |
| Sligo | — |
10 TOPS · FIRST 8
Best Bateman-Best Huth SA142-255-38164
0.6 KM · Marathon Oil EF LLC · Section with this well →
| Frio | 420 | 63 |
| Yegua | 1,589 | -1,106 |
| Queen City | 3,606 | -3,123 |
| Reklaw | 4,490 | -4,007 |
| Carrizo | 4,769 | -4,286 |
| Wilcox | 4,939 | -4,456 |
| Austin Chalk | 11,486 | -11,003 |
| Eagle Ford | 11,651 | -11,168 |
10 TOPS · FIRST 8
Ted Butler Unit42-255-37081
0.8 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 2,640 | -2,155 |
| Queen City | 3,555 | -3,070 |
| Reklaw | 4,110 | -3,625 |
| Carrizo | 4,700 | -4,215 |
| Wilcox | 4,750 | -4,265 |
| Austin Chalk | 11,279 | -10,794 |
| Eagle Ford | 11,417 | -10,932 |
| Edwards | — |
10 TOPS · FIRST 8
Ted Butler Unit42-255-37082
0.8 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 2,640 | -2,155 |
| Queen City | 3,555 | -3,070 |
| Reklaw | 4,110 | -3,625 |
| Carrizo | 4,700 | -4,215 |
| Wilcox | 4,750 | -4,265 |
| Austin Chalk | 11,251 | -10,766 |
| Eagle Ford | 11,427 | -10,942 |
| Edwards | — |
10 TOPS · FIRST 8
Ted Butler Unit42-255-37083
0.8 KM · Marathon Oil EF LLC · Section with this well →
| Yegua | 2,640 | -2,321 |
| Queen City | 3,555 | -3,236 |
| Reklaw | 4,110 | -3,791 |
| Carrizo | 4,700 | -4,381 |
| Wilcox | 4,750 | -4,431 |
| Austin Chalk | 11,255 | -10,936 |
| Eagle Ford | 11,436 | -11,117 |
| Sligo | — |
10 TOPS · FIRST 8
Turnbull F-Kowalik SA342-255-37363
1.6 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 | — | |
| 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/25537046, documented in the API reference.