42-255-37045

Final Completion Horizontal

BEST-FENNER UNIT

KARNES County · District 2 · MARATHON OIL EF LLC · EAGLEVILLE (EAGLE FORD-2)

Permits

1

Max Depth

21,000 ft

First Permit

2020-12-01

Latest Activity

2020-12-01

Lifespan

< 1 yr

Regulatory Status

Schedule

OFF SCHEDULE

Completion

2021-09-14

Shut-In

Plugged

Production Summary

Cum Oil

bbl

Cum Gas

mcf

First Production

2011-06

Last Production

2026-07

Lease Production

Production is reported at the lease level. View production data, decline curves, and history on the lease page.

Formation Tops (10) Elevation 480 ft (GR)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
YEGUA - DISPOSAL (Yegua)1,698 ft-1,218 ft
QUEEN CITY 3,799 ft-3,319 ft
REKLAW 4,383 ft-3,903 ft
CARRIZO 4,736 ft-4,256 ft
WILCOX - DISPOSAL (Wilcox)6,340 ft-5,860 ft
AUSTIN CHALK - H2S (Austin Chalk)11,415 ft-10,935 ft
EAGLE FORD - H2S (Eagle Ford)11,606 ft-11,126 ft
EDWARDS - H2S (Edwards)
FRIO - DISPOSAL (Frio)
SLIGO - H2S (Sligo)

As reported by operators on W-2/G-1 completion filings (RRC wellbore records). Depths are measured depth; names appear as filed. Subsea = reported elevation − measured depth (negative = below sea level; vertical wellbores only). View filings & logs at RRC ↗

Offset Well Tops (nearest 8 wells with tops)

What nearby completed wells reported.

Cross-section
42-255-37046 BEST-FENNER UNIT · MARATHON OIL EF LLC
0.0 mi
Yegua 1,698'Queen City 3,799'Reklaw 4,383'Carrizo 4,736'Wilcox 6,340'Austin Chalk 11,397'Eagle Ford 11,588'Sligo Frio Edwards
42-255-37043 BUTLER-HUTH-SCHEELE SA · MARATHON OIL EF LLC
0.0 mi
Yegua 1,698'Queen City 3,799'Reklaw 4,383'Carrizo 4,736'Wilcox 6,340'Austin Chalk 11,416'Eagle Ford 11,590'Frio Sligo Edwards
42-255-37044 BUTLER-FENNER-ST. GERMAINE SA · MARATHON OIL EF LLC
0.0 mi
Yegua 1,698'Queen City 3,799'Reklaw 4,383'Carrizo 4,736'Wilcox 6,340'Austin Chalk 11,399'Eagle Ford 11,585'Frio Sligo Edwards
42-255-37081 TED BUTLER UNIT · MARATHON OIL EF LLC
0.5 mi
Yegua 2,640'Queen City 3,555'Reklaw 4,110'Carrizo 4,700'Wilcox 4,750'Austin Chalk 11,279'Eagle Ford 11,417'Sligo Frio Edwards
42-255-37082 TED BUTLER UNIT · MARATHON OIL EF LLC
0.5 mi
Yegua 2,640'Queen City 3,555'Reklaw 4,110'Carrizo 4,700'Wilcox 4,750'Austin Chalk 11,251'Eagle Ford 11,427'Frio Edwards Sligo
42-255-37083 TED BUTLER UNIT · MARATHON OIL EF LLC
0.5 mi
Yegua 2,640'Queen City 3,555'Reklaw 4,110'Carrizo 4,700'Wilcox 4,750'Austin Chalk 11,255'Eagle Ford 11,436'Sligo Frio Edwards
42-255-37363 TURNBULL F-KOWALIK SA3 · MARATHON OIL EF LLC
1.0 mi
Queen City 3,520'Reklaw 4,105'Carrizo 4,652'Wilcox 4,739'Austin Chalk 11,276'Eagle Ford 11,462'Yegua Frio Edwards Sligo
42-255-37364 TURNBULL F-KOWALIK SA1 · MARATHON OIL EF LLC
1.0 mi
Queen City 3,520'Reklaw 4,105'Carrizo 4,652'Wilcox 4,739'Austin Chalk 11,290'Eagle Ford 11,479'Frio Yegua Sligo Edwards

Nearest wells within 10 mi (surface locations). Click wells to select them, then open the cross-section to compare tops side by side (max 6 wells per section, including this one).

Perforations (1)

IntervalType
11,965–18,998 ftPerforated

Casing (2)

SizeSet DepthCement
9.625"6,102 ft1,744 sx
5.5"18,997 ft3,464 sx

Permit History (1)

Applications (1)

#866177 A MARATHON OIL EF LLC
received 2020-11-20

Records & Logs

3 completion filings on record · 2 with log images at RRC.

W-2/G-1 2023-08-31 log on file
W-2/G-1 2021-10-08
W-2/G-1 2021-02-12 log on file

Completion packets open directly (post-2011 filings include attached logs). Log images can't be deep-linked — clicking copies the API for you to paste.

Lat 28.817436
Lon -98.013528

Well Details

Well Number
5H
Max Depth
21,000 ft
Drill Type
Horizontal
County
KARNES
District
2
Completed
2021-09-14

Operator

Location
HOUSTON
P-5 Status
Active (filed 2025-09-26)
Cum Oil (all leases)
409,189,156 bbl
Cum Gas (all leases)
1,029,735,602 mcf
Activities
CSGD/G, CSGD/P, G/PUR, GTHS/C, GTHS/G, GTHS/O, OPRS/G, OPRS/O
Total Permits
3,173