42-501-31977

Final Completion

MORLEY-HUDSON

YOAKUM County · District 8 · MAMMOTH EXPLORATION LLC

Permits

Max Depth

12,500 ft

First Permit

1981-02-04

Latest Activity

2017-12-21

Lifespan

37 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

—

Shut-In

—

Plugged

1981-04-17

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

2018-03

Last Production

2026-07

Injection / Disposal

H-1 Injection Active UIC #000116044 permitted 2018-02-21

Permitted Volume

20,000 bbl/d

Max Pressure

2,965 psi

Injection Interval

5,930–12,500 ft

Injected (12mo)

335,732 bbl

Monthly injected volume (bbl, from H-10 filings through 2025-11-01)

Seismicity: no M2+ earthquakes recorded within 10 km in the last 24 months · TexNet catalog

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 3,707 ft (GL)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
SAN ANDRES	4,350 ft	-643 ft
WOLFCAMP	8,816 ft	-5,109 ft
STRAWN	10,696 ft	-6,989 ft
MISSISSIPPIAN	11,376 ft	-7,669 ft
DEVONIAN	12,024 ft	-8,317 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

✓ 42-501-31998 HUDSON-MORLEY TRUST B · MOBIL PRODUCING TX. & N.M. INC.

0.8 mi

Santa Rosa 2,350'Yates 3,196'San Andres 4,340'San Andres 4,340'Glorieta 6,044'Clear Fork 6,179'Leonard 6,179'Wichita-Albany 7,050'Wolfcamp 9,119'Pennsylvanian 9,767'Strawn 10,517'SILURO DEVONIAN 12,013'

✓ 42-079-33374 HUDSON · MAMMOTH EXPLORATION LLC

1.4 mi

Santa Rosa 1,695'Yates 3,045'San Andres 4,420'Devonian —Abo —Wichita-Albany —Wolfcamp —Cisco —Strawn —Clear Fork —

✓ 42-079-33387 SEIBER, E.H. · JOPLIN OIL CO., INC.

2.3 mi

Santa Rosa 1,800'Yates 3,000'San Andres 5,137'Wichita-Albany —Devonian —Wolfcamp —Cisco —Strawn —Clear Fork —Abo —

✓ 42-079-33367 REVEREND JOHNSON UNIT 20-21 · ELEMENT PETROLEUM OP III, LLC

5.7 mi

Santa Rosa 1,100'Rustler 2,374'Yates 2,600'Tansill 2,938'Seven Rivers 3,230'Queen 3,767'Grayburg 4,100'San Andres 4,321'San Andres —Glorieta —

✓ 42-501-36719 SARAH · WINDY COVE ENERGY II, LLC

6.0 mi

Santa Rosa 1,100'Yates 2,800'San Andres 4,500'Strawn —Leonard —Glorieta —Wichita-Albany —Pennsylvanian —Wolfcamp —Clear Fork —

✓ 42-079-33386 BART OLSEN UNIT 26-28 · ELEMENT PETROLEUM OP III, LLC

7.4 mi

Rustler 2,359'Tansill 2,950'Yates 3,022'San Andres 4,332'Wolfcamp —Clear Fork —Cisco —Abo —Wichita-Albany —Santa Rosa —

✓ 42-079-31809 STARNES 32 · NEWHALL RESOURCES

7.6 mi

Rustler 2,338'Yates 3,018'San Andres 4,330'San Andres 5,122'

✓ 42-501-36852 BOWERS · WINDY COVE ENERGY II, LLC

8.0 mi

Santa Rosa 1,100'Yates 2,800'San Andres 4,500'Pennsylvanian —Leonard —Clear Fork —Strawn —Wolfcamp —Glorieta —Wichita-Albany —

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 (2)

Interval	Type
5,930–12,000 ft	Perforated
12,000–12,500 ft	Open hole

Casing (3)

Size	Set Depth	Cement
13.375"	477 ft	625 sx
8.625"	4,560 ft	1,000 sx
5.5"	12,023 ft	620 sx

Permit History (3)

#834176 Reenter Final Completion

MORLEY-HUDSON · 12,500 ft

2017-12-21

Spud 2018-03-08

#222582 Other

M-H · 12,110 ft

1983-12-02

#107602 Drill Plug Dry Hole (P&A)

MORLEY-HUDSON · 12,110 ft

1981-02-04

Spud 1981-02-26

Applications (3)

#834176 A MAMMOTH EXPLORATION LLC

received 2017-12-12

#222582 A BTA OIL PRODUCERS

received 1983-12-02

#107602 A THRESHOLD-BLOCKER VENTURE

received 1981-02-04

Records & Logs

1 completion filing on record.

W-2/G-1 2018-05-17

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 33.389115

Lon -102.750969

Well Details

Well Number: 1
Max Depth: 12,500 ft
Drill Type: Vertical
County: YOAKUM
District: 8
Operator: MAMMOTH EXPLORATION LLC

Operator

Name: MAMMOTH EXPL LLC
Location: MIDLAND
P-5 Status: Inactive (filed 2023-07-21)
Cum Oil (all leases): 827,059 bbl
Cum Gas (all leases): 186,859 mcf
Total Permits: 38