42-013-35906

Horizontal

TOM-SMITH UNIT C

ATASCOSA County · District 1 · MARATHON OIL EF LLC

Permits

3

Max Depth

22,000 ft

First Permit

2022-04-11

Latest Activity

2024-04-24

Lifespan

2 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

Shut-In

Plugged

Production Summary

Cum Oil

bbl

Cum Gas

mcf

First Production

2021-09

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 296 ft (GL)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
QUEEN CITY 1,974 ft-1,678 ft
REKLAW 2,859 ft-2,563 ft
CARRIZO 3,512 ft-3,216 ft
WILCOX - DISPOSAL (Wilcox)3,596 ft-3,300 ft
AUSTIN CHALK - H2S, DISPOSAL (Austin Chalk)10,069 ft-9,773 ft
ANACACHO - H2S (Anacacho)
BARTOSH
ESCONDIDO - H2S, DISPOSAL (Escondido)
NAVARRO - H2S (Navarro)
OLMOS - DISPOSAL (Olmos)

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
42-013-35905 TOM-SMITH UNIT C · MARATHON OIL EF LLC
0.0 mi
Queen City 1,974'Reklaw 2,859'Carrizo 3,512'Wilcox 3,596'Austin Chalk 10,019'Bartosh Anacacho Escondido Navarro Olmos
42-013-35904 TOM-SMITH UNIT C · MARATHON OIL EF LLC
0.0 mi
Sparta 1,536'Queen City 1,970'Reklaw 2,859'Carrizo 3,511'Wilcox 3,595'Anacacho 9,826'Austin Chalk 9,990'Queen City Olmos Bartosh Escondido Navarro
42-013-35903 TOM-SMITH UNIT C · MARATHON OIL EF LLC
0.0 mi
Queen City 1,970'Reklaw 2,859'Carrizo 3,511'Wilcox 3,595'Anacacho 9,802'Austin Chalk 9,998'Navarro Bartosh Olmos Escondido
42-013-35818 TOM-SMITH UNIT B · MARATHON OIL EF LLC
0.3 mi
Queen City 2,305'Reklaw 2,619'Carrizo 3,276'Wilcox 4,650'Anacacho 9,812'Austin Chalk 10,012'Escondido Bartosh Navarro Olmos
42-013-35819 TOM-SMITH UNIT B · MARATHON OIL EF LLC
0.3 mi
Queen City 2,305'Reklaw 2,619'Carrizo 3,276'Wilcox 4,650'Anacacho 9,847'Austin Chalk 10,021'Bartosh Navarro Escondido Olmos
42-013-35744 TOM-SMITH UNIT B · MARATHON OIL EF LLC
0.4 mi
Queen City 2,386'Reklaw 2,701'Bartosh 2,983'Carrizo 3,361'Wilcox 4,737'Navarro 7,867'Olmos 8,437'Anacacho 9,828'Austin Chalk 10,024'Escondido
42-013-35745 TOM-SMITH UNIT B · MARATHON OIL EF LLC
0.4 mi
Queen City 2,386'Reklaw 2,701'Bartosh 2,983'Carrizo 3,361'Wilcox 4,737'Navarro 7,867'Olmos 8,437'Anacacho 9,830'Austin Chalk 10,021'Escondido
42-013-36201 QUAIL · EOG RESOURCES, INC.
1.4 mi
Queen City 2,064'Reklaw 2,644'Wilcox 3,346'Carrizo 3,406'Navarro 7,523'Escondido 7,523'Olmos 8,327'Anacacho 9,842'Austin Chalk 10,167'Bartosh

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
10,640–17,777 ftPerforated

Casing (2)

SizeSet DepthCement
9.625"4,743 ft1,316 sx
5.5"17,749 ft2,955 sx

Permit History (3)

Applications (3)

#898863 A MARATHON OIL EF LLC
received 2025-01-08
#898863 A MARATHON OIL EF LLC
received 2024-04-14
#878807 A MARATHON OIL EF LLC
received 2022-04-05

Records & Logs

1 completion filing on record · 1 with log images at RRC.

W-2/G-1 2024-12-26 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 28.756056
Lon -98.251814

Well Details

Well Number
6H
Max Depth
22,000 ft
Drill Type
Horizontal
County
ATASCOSA
District
1

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