42-013-35744

PRODUCING Horizontal

TOM-SMITH UNIT B

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

Permits

1

Max Depth

22,000 ft

First Permit

2019-07-19

Latest Activity

2019-07-19

Lifespan

< 1 yr

Regulatory Status

Schedule

ON SCHEDULE

Completion

2021-06-18

Shut-In

Plugged

P-5 Org Status: Active

Production Summary

Cum Oil

bbl

Cum Gas

mcf

First Production

2015-02

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 274 ft (GR)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
QUEEN CITY 2,386 ft-2,112 ft
REKLAW 2,701 ft-2,427 ft
BARTOSH 2,983 ft-2,709 ft
CARRIZO 3,361 ft-3,087 ft
WILCOX - DISPOSAL (Wilcox)4,737 ft-4,463 ft
NAVARRO - H2S (Navarro)7,867 ft-7,593 ft
OLMOS - DISPOSAL (Olmos)8,437 ft-8,163 ft
ANACACHO - H2S (Anacacho)9,828 ft-9,554 ft
AUSTIN CHALK - H2S, DISPOSAL (Austin Chalk)10,024 ft-9,750 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
42-013-35745 TOM-SMITH UNIT B · MARATHON OIL EF LLC
0.0 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
42-013-35819 TOM-SMITH UNIT B · MARATHON OIL EF LLC
0.1 mi
Queen City 2,305'Reklaw 2,619'Carrizo 3,276'Wilcox 4,650'Anacacho 9,847'Austin Chalk 10,021'Olmos Escondido Bartosh Navarro
42-013-35818 TOM-SMITH UNIT B · MARATHON OIL EF LLC
0.1 mi
Queen City 2,305'Reklaw 2,619'Carrizo 3,276'Wilcox 4,650'Anacacho 9,812'Austin Chalk 10,012'Olmos Bartosh Navarro Escondido
42-013-35906 TOM-SMITH UNIT C · MARATHON OIL EF LLC
0.4 mi
Queen City 1,974'Reklaw 2,859'Carrizo 3,512'Wilcox 3,596'Austin Chalk 10,069'Navarro Bartosh Anacacho Escondido Olmos
42-013-35905 TOM-SMITH UNIT C · MARATHON OIL EF LLC
0.4 mi
Queen City 1,974'Reklaw 2,859'Carrizo 3,512'Wilcox 3,596'Austin Chalk 10,019'Navarro Bartosh Anacacho Escondido Olmos
42-013-35904 TOM-SMITH UNIT C · MARATHON OIL EF LLC
0.4 mi
Sparta 1,536'Queen City 1,970'Reklaw 2,859'Carrizo 3,511'Wilcox 3,595'Anacacho 9,826'Austin Chalk 9,990'Navarro Queen City Bartosh Escondido Olmos
42-013-35903 TOM-SMITH UNIT C · MARATHON OIL EF LLC
0.4 mi
Queen City 1,970'Reklaw 2,859'Carrizo 3,511'Wilcox 3,595'Anacacho 9,802'Austin Chalk 9,998'Navarro Bartosh Escondido Olmos
42-013-36170 POST OAK · TIDAL PETROLEUM, INC.
1.4 mi
Queen City 2,085'Reklaw 2,750'Bartosh 3,210'Carrizo 3,391'Wilcox 4,685'Navarro 7,075'Navarro 7,103'Escondido 7,470'Escondido 7,500'Olmos 8,359'Olmos 8,390'Anacacho 9,618' +3 more

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
10,413–17,312 ftPerforated

Casing (2)

SizeSet DepthCement
9.625"4,796 ft1,404 sx
5.5"17,421 ft2,974 sx

Permit History (1)

Applications (1)

#855333 A MARATHON OIL EF LLC
received 2019-07-19

Records & Logs

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

W-2/G-1 2021-07-09 log on file
W-2/G-1 2021-05-24
W-2/G-1 2019-08-23 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 28.752025
Lon -98.256714

Well Details

Well Number
7H
Max Depth
22,000 ft
Drill Type
Horizontal
County
ATASCOSA
District
1
Completed
2021-06-18

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