← Wells

42-013-35773

Horizontal

GUAJILLO UNIT 15 SOUTH AC

ATASCOSA County · District 2 · MARATHON OIL EF LLC

Permits

1

Max Depth

22,000 ft

First Permit

2019-10-25

Latest Activity

2019-10-25

Lifespan

< 1 yr

Regulatory Status

Schedule

OFF SCHEDULE

Completion

—

Shut-In

—

Plugged

—

Formation Tops

No tops on file for this well. Formation tops come from W-2/G-1 completion filings — this well has none yet, which is normal for permits that were never drilled, dry holes plugged without a filing, or wells completed before digital records. The nearest completed wells below show what to expect at this location.

Check this well's filings at RRC ↗

Offset Well Tops (nearest 8 wells with tops)

What nearby completed wells reported — this well has no filings of its own yet.

Cross-section
✓ 42-013-35768 GUAJILLO UNIT 15 SOUTH · MARATHON OIL EF LLC
0.0 mi
Queen City 2,741'Reklaw 3,094'Carrizo 3,728'Wilcox 5,155'Anacacho 10,371'Austin Chalk 10,616'Bartosh —Escondido —Navarro —Olmos —
✓ 42-013-35769 GUAJILLO UNIT 15 SOUTH · MARATHON OIL EF LLC
0.0 mi
Queen City 2,741'Reklaw 3,094'Carrizo 3,728'Wilcox 5,155'Anacacho 10,372'Austin Chalk 10,608'Eagle Ford 10,730'Navarro —Escondido —Bartosh —Olmos —
✓ 42-013-35770 GUAJILLO UNIT 15 SOUTH · MARATHON OIL EF LLC
0.0 mi
Queen City 2,741'Reklaw 3,094'Carrizo 3,728'Wilcox 5,155'Anacacho 10,337'Austin Chalk 10,586'Navarro —Bartosh —Olmos —Escondido —
✓ 42-013-35771 GUAJILLO UNIT 15 SOUTH · MARATHON OIL EF LLC
0.0 mi
Queen City 2,741'Reklaw 3,094'Carrizo 3,728'Wilcox 5,155'Wilcox 5,155'Anacacho 10,359'Anacacho 10,359'Austin Chalk 10,603'Austin Chalk 10,603'Bartosh —Navarro —Olmos — +2 more
✓ 42-013-35772 GUAJILLO UNIT 15 SOUTH · MARATHON OIL EF LLC
0.0 mi
Queen City 2,741'Reklaw 3,094'Carrizo 3,728'Wilcox 5,155'Anacacho 10,366'Austin Chalk 10,615'Navarro —Olmos —Bartosh —Escondido —
✓ 42-013-35848 GUAJILLO UNIT 14 SOUTH · MARATHON OIL EF LLC
0.4 mi
Queen City 2,505'Reklaw 3,210'Carrizo 3,895'Wilcox 5,810'Anacacho 10,422'Austin Chalk 10,660'Navarro —Olmos —Bartosh —Escondido —
✓ 42-013-35847 GUAJILLO UNIT 14 SOUTH · MARATHON OIL EF LLC
0.4 mi
Queen City 2,505'Reklaw 3,210'Carrizo 3,895'Wilcox 5,810'Anacacho 10,438'Austin Chalk 10,674'Bartosh —Escondido —Navarro —Olmos —
✓ 42-013-35846 GUAJILLO UNIT 14 SOUTH · MARATHON OIL EF LLC
0.4 mi
Queen City 2,505'Reklaw 3,210'Carrizo 3,895'Wilcox 5,125'Anacacho 10,450'Austin Chalk 10,686'Escondido —Bartosh —Navarro —Olmos —

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).

Permit History (1)

#858286 Drill

GUAJILLO UNIT 15 SOUTH AC · 22,000 ft

2019-10-25

Applications (1)

#858286 A MARATHON OIL EF LLC
received 2019-10-22

Records & Logs

No W-2/G-1 filings on record in the RRC wellbore file for this well.

Completion packets + logs ↗ Wellbore filings ↗

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.

Google Maps → Explorer Map →
Lat 28.671803
Lon -98.310564

Well Details

Well Number
1H
Max Depth
22,000 ft
Drill Type
Horizontal
County
ATASCOSA
District
2
Operator
MARATHON OIL EF LLC

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
3,166