42-013-35641

PRODUCING Horizontal

74 RANCH-GUAJILLO UNIT B

ATASCOSA County · District 1 · MARATHON OIL EF LLC · EAGLEVILLE (EAGLE FORD-1)

Permits

1

Max Depth

21,000 ft

First Permit

2018-12-31

Latest Activity

2018-12-31

Lifespan

< 1 yr

Regulatory Status

Schedule

ON SCHEDULE

Completion

2019-11-17

Shut-In

Plugged

P-5 Org Status: Active

Production Summary

Cum Oil

bbl

Cum Gas

mcf

First Production

2019-01

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 251 ft (GR)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
QUEEN CITY 3,092 ft-2,841 ft
REKLAW 3,412 ft-3,161 ft
BARTOSH 3,772 ft-3,521 ft
CARRIZO 3,996 ft-3,745 ft
WILCOX - DISPOSAL (Wilcox)5,500 ft-5,249 ft
NAVARRO - H2S (Navarro)8,458 ft-8,207 ft
OLMOS - DISPOSAL (Olmos)9,160 ft-8,909 ft
ANACACHO - H2S (Anacacho)10,707 ft-10,456 ft
AUSTIN CHALK - H2S, DISPOSAL (Austin Chalk)10,989 ft-10,738 ft
ESCONDIDO - H2S, DISPOSAL (Escondido)

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
42-013-35640 74 RANCH-GUAJILLO UNIT B · MARATHON OIL EF LLC
0.0 mi
Queen City 3,102'Reklaw 3,422'Bartosh 3,782'Carrizo 4,006'Wilcox 5,510'Navarro 8,468'Olmos 9,170'Anacacho 10,714'Austin Chalk 10,992'Eagle Ford 11,084'Escondido
42-013-35639 74 RANCH-GUAJILLO UNIT B · MARATHON OIL EF LLC
0.0 mi
Queen City 3,112'Reklaw 3,432'Bartosh 3,792'Carrizo 4,016'Wilcox 5,520'Navarro 8,478'Olmos 9,180'Anacacho 10,724'Austin Chalk 11,000'Escondido
42-013-35638 74 RANCH-GUAJILLO UNIT B · MARATHON OIL EF LLC
0.0 mi
Queen City 3,102'Queen City 3,112'Reklaw 3,422'Reklaw 3,432'Bartosh 3,782'Bartosh 3,792'Carrizo 4,006'Carrizo 4,016'Wilcox 5,510'Wilcox 5,520'Navarro 8,468'Navarro 8,478' +5 more
42-013-35637 74 RANCH-GUAJILLO UNIT B · MARATHON OIL EF LLC
0.0 mi
Queen City 3,112'Reklaw 3,432'Bartosh 3,792'Carrizo 4,016'Wilcox 5,520'Navarro 8,478'Olmos 9,180'Anacacho 10,740'Austin Chalk 11,015'Escondido
42-013-35479 GUAJILLO UNIT 16 NORTH · MARATHON OIL EF LLC
0.3 mi
Queen City 2,991'Reklaw 3,353'Bartosh 3,752'Carrizo 3,993'Wilcox 5,281'Navarro 8,943'Olmos 9,279'Anacacho 10,769'Austin Chalk 11,023'Escondido
42-013-35478 GUAJILLO UNIT 16 NORTH · MARATHON OIL EF LLC
0.3 mi
Queen City 2,991'Reklaw 3,353'Bartosh 3,752'Carrizo 3,992'Carrizo 3,993'Wilcox 5,281'Navarro 8,943'Olmos 9,279'Anacacho 10,780'Austin Chalk 11,033'Escondido
42-013-35477 GUAJILLO UNIT 16 NORTH · MARATHON OIL EF LLC
0.3 mi
Queen City 2,991'Reklaw 3,353'Bartosh 3,752'Carrizo 3,993'Wilcox 5,281'Navarro 8,943'Olmos 9,279'Anacacho 10,785'Austin Chalk 11,039'Escondido
42-297-36416 GUAJILLO-WHITSETT POSEY SA1 · MARATHON OIL EF LLC
0.5 mi
Queen City 2,746'Wilcox 4,052'Austin Chalk 10,928'Eagle Ford 11,020'HOCKLEY - DISPOSAL Edwards Cook Mountain Sligo Jackson Frio

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
11,813–17,398 ftPerforated

Casing (2)

SizeSet DepthCement
9.625"5,454 ft1,758 sx
5.5"17,508 ft3,038 sx

Permit History (1)

Applications (1)

#845873 A MARATHON OIL EF LLC
received 2018-10-18

Records & Logs

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

W-2/G-1 2020-02-24 log on file
W-2/G-1 2019-10-05 log on file
W-2/G-1 2019-03-07 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 28.642983
Lon -98.295256

Well Details

Well Number
5H
Max Depth
21,000 ft
Drill Type
Horizontal
County
ATASCOSA
District
1
Completed
2019-11-17

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