42-013-35638

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

2019-11-18

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 (17) Elevation 251 ft (GR)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
QUEEN CITY 3,102 ft-2,851 ft
QUEEN CITY 3,112 ft-2,861 ft
REKLAW 3,422 ft-3,171 ft
REKLAW 3,432 ft-3,181 ft
BARTOSH 3,782 ft-3,531 ft
BARTOSH 3,792 ft-3,541 ft
CARRIZO 4,006 ft-3,755 ft
CARRIZO 4,016 ft-3,765 ft
WILCOX - DISPOSAL (Wilcox)5,510 ft-5,259 ft
WILCOX - DISPOSAL (Wilcox)5,520 ft-5,269 ft
NAVARRO - H2S (Navarro)8,468 ft-8,217 ft
NAVARRO - H2S (Navarro)8,478 ft-8,227 ft
OLMOS - DISPOSAL (Olmos)9,170 ft-8,919 ft
OLMOS - DISPOSAL (Olmos)9,180 ft-8,929 ft
ANACACHO - H2S (Anacacho)10,733 ft-10,482 ft
AUSTIN CHALK - H2S, DISPOSAL (Austin Chalk)11,006 ft-10,755 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
42-013-35637 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
42-013-35639 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
42-013-35640 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
42-013-35641 74 RANCH-GUAJILLO UNIT B · MARATHON OIL EF LLC
0.0 mi
Queen City 3,092'Reklaw 3,412'Bartosh 3,772'Carrizo 3,996'Wilcox 5,500'Navarro 8,458'Olmos 9,160'Anacacho 10,707'Austin Chalk 10,989'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'Sligo Cook Mountain Edwards Jackson HOCKLEY - DISPOSAL 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
11,799–17,422 ftPerforated

Casing (2)

SizeSet DepthCement
9.625"5,472 ft1,758 sx
5.5"17,531 ft3,090 sx

Permit History (1)

Applications (1)

#845870 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 2020-02-25 log on file
W-2/G-1 2019-10-05 log on file
W-2/G-1 2019-03-08 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 28.643239
Lon -98.295175

Well Details

Well Number
2H
Max Depth
21,000 ft
Drill Type
Horizontal
County
ATASCOSA
District
1
Completed
2019-11-18

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