← Wells

42-507-33314

PRODUCING Horizontal

LLM SOUTH

ZAVALA County · District 1 · U.S. ENERGY DEVELOPMENT CORP · BRISCOE RANCH (EAGLEFORD)

Permits

1

Max Depth

9,000 ft

First Permit

2017-12-14

Latest Activity

2017-12-14

Lifespan

< 1 yr

Regulatory Status

Schedule

ON SCHEDULE

Completion

2018-10-17

Shut-In

—

Plugged

—

P-5 Org Status: Active

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

2017-05

Last Production

2026-07

Lease Production

Production is reported at the lease level. View production data, decline curves, and history on the lease page.

Oil
production & DCA →

Formation Tops (5) Elevation 624 ft (GL)

CSV
FormationTop Depth (MD)Subsea (+above / −below SL)
ESCONDIDO - DISPOSAL (Escondido)2,802 ft-2,178 ft
OLMOS 3,784 ft-3,160 ft
SAN MIGUEL 4,319 ft-3,695 ft
AUSTIN CHALK 5,017 ft-4,393 ft
EAGLE FORD 5,501 ft-4,877 ft

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
✓ 42-507-33315 LLM SOUTH B UNIT · U.S. ENERGY DEVELOPMENT CORP
0.0 mi
Escondido 2,783'Olmos 3,759'San Miguel 4,300'Austin Chalk 4,987'Eagle Ford 5,470'
✓ 42-507-33289 LLM SOUTH · U.S. ENERGY DEVELOPMENT CORP
0.4 mi
Escondido 2,830'Austin Chalk 5,073'Eagle Ford 5,556'
✓ 42-507-33312 LLM SOUTH · U.S. ENERGY DEVELOPMENT CORP
0.4 mi
Escondido 2,762'Olmos 3,737'San Miguel 4,290'Austin Chalk 4,555'Eagle Ford 4,965'
✓ 42-507-33313 LLM SOUTH · U.S. ENERGY DEVELOPMENT CORP
0.4 mi
Escondido 2,753'Olmos 3,725'San Miguel 4,280'Austin Chalk 4,932'Eagle Ford 5,417'
✓ 42-507-33355 SOLA VACA NORTE · U.S. ENERGY DEVELOPMENT CORP
0.8 mi
Escondido 2,898'Olmos 3,876'San Miguel 4,437'Anacacho 4,754'Austin Chalk 5,160'Eagle Ford 5,651'
✓ 42-507-33356 SOLA VACA NORTE · U.S. ENERGY DEVELOPMENT CORP
0.8 mi
Escondido 2,875'Olmos 3,887'San Miguel 4,441'Anacacho 4,755'Austin Chalk 5,162'Eagle Ford 5,668'
✓ 42-507-33310 SOLA VACA NORTE · U.S. ENERGY DEVELOPMENT CORP
1.3 mi
Escondido 2,900'Olmos 3,830'San Miguel 4,428'Anacacho 4,736'Austin Chalk 5,150'Eagle Ford 5,636'
✓ 42-507-33309 SOLA VACA NORTE · U.S. ENERGY DEVELOPMENT CORP
1.3 mi
Escondido 2,901'Olmos 3,860'San Miguel 4,420'Anacacho 4,702'Austin Chalk 5,112'Eagle Ford 5,587'

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
6,250–17,136 ftPerforated

Casing (2)

SizeSet DepthCement
9.625"2,613 ft780 sx
5.5"17,293 ft2,625 sx

Permit History (1)

#833929 Drill Final Completion

LLM SOUTH B UNIT · 9,000 ft

2017-12-14

Spud 2018-02-17

Applications (1)

#833929 A U.S. ENERGY DEVELOPMENT CORP
received 2017-12-06

Records & Logs

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

W-2/G-1 2018-11-09 log on file
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 28.862127
Lon -99.449309

Well Details

Well Number
1EF
Max Depth
9,000 ft
Drill Type
Horizontal
County
ZAVALA
District
1
Operator
U.S. ENERGY DEVELOPMENT CORP
Completed
2018-10-17

Operator

Location
FORT WORTH
P-5 Status
Active (filed 2026-02-18)
Cum Oil (all leases)
14,882,303 bbl
Cum Gas (all leases)
30,585,425 mcf
Activities
OPRS/G, OPRS/O
Total Permits
225