42-211-34621

Final Completion

VOLLMERT C

HEMPHILL County · District 10 · UNIT PETROLEUM COMPANY · MENDOTA NW. (GRANITE WASH)

Permits

Max Depth

11,300 ft

First Permit

2009-07-01

Latest Activity

2017-06-05

Lifespan

8 yrs

Regulatory Status

Schedule

OFF SCHEDULE

Completion

2009-10-19

Shut-In

—

Plugged

—

Production Summary

Cum Oil

— bbl

Cum Gas

— mcf

First Production

2009-10

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 (7) Elevation 2,629 ft (GR)

CSV

Formation	Top Depth (MD)	Subsea (+above / −below SL)
BROWN DOLOMITE	3,980 ft	-1,351 ft
DOUGLAS	6,916 ft	-4,287 ft
KANSAS CITY	8,112 ft	-5,483 ft
MARMATON	9,050 ft	-6,421 ft
GRANITE WASH	9,520 ft	-6,891 ft
NOVI	10,810 ft	-8,181 ft
13 FINGER	10,890 ft	-8,261 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

✓ 42-211-34295 ISAACS E · UNIT PETROLEUM COMPANY

0.5 mi

Brown Dolomite 3,890'Douglas 6,828'Kansas City 8,021'KC 8,021'Marmaton 8,942'Granite Wash 9,413'NOVI 10,767'13 FINGER 10,862'Morrow 11,000'

✓ 42-211-34301 VOLLMERT 'C' · UNIT PETROLEUM COMPANY

0.5 mi

Brown Dolomite 3,968'Douglas 6,878'KC 8,060'Kansas City 8,060'Marmaton 8,985'Granite Wash 9,450'NOVI 10,712'13 FINGER 10,790'Morrow 10,910'

✓ 42-211-34298 VOLLMERT "C" · UNIT PETROLEUM COMPANY

0.8 mi

HEEBNER 6,917'Douglas 6,917'Douglas 6,917'Granite Wash 9,738'NOVI 11,010'

✓ 42-211-33714 ISAACS C · UNIT PETROLEUM COMPANY

1.2 mi

BASE RED BEDS 3,915'RED BEDS 3,915'Brown Dolomite 3,915'Brown Dolomite 4,390'BASE HEEBNER 6,838'HEEBNER 6,838'Douglas 6,838'Douglas 7,210'Kansas City 8,072'Kansas City 8,440'Marmaton 9,120'Marmaton 9,218' +6 more

✓ 42-393-31941 VOLLMERT, J. C. · UNIT PETROLEUM COMPANY

1.4 mi

Brown Dolomite 3,932'Douglas 6,847'Douglas 7,257'Kansas City 8,004'Kansas City 8,358'Granite Wash 9,346'Granite Wash 10,654'13 FINGER 10,745'Morrow 10,823'13 FINGER 10,823'Morrow 11,249'

✓ 42-393-32180 WATERFIELD 'A' · UNIT PETROLEUM COMPANY

2.6 mi

Brown Dolomite 4,119'Brown Dolomite 4,419'Douglas 6,930'Kansas City 8,145'Marmaton 9,120'Granite Wash 9,535'NOVI LIME 10,675'13 FINGER 10,755'

✓ 42-393-30128 SUSAN R. KAUFMAN · MMGL TXPH, LLC

4.0 mi

Brown Dolomite 4,256'Douglas 7,126'Tonkawa 7,543'Kansas City 8,182'CHEROKEE 10,200'Morrow 10,930'Morrow 11,388'Morrow 12,195'

✓ 42-393-30882 MAHLER -A- · TEXAS OIL & GAS CORP.

4.0 mi

Granite Wash 9,500'Morrow 10,800'Morrow 12,100'

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 (4)

Interval	Type
7,304–7,316 ft	Perforated
9,930–9,990 ft	Perforated
10,054–10,099 ft	Perforated
10,158–10,694 ft	Perforated

Casing (2)

Size	Set Depth	Cement
9.625"	2,814 ft	990 sx
5.5"	10,960 ft	375 sx

Permit History (2)

#827208 Recompletion Final Completion

VOLLMERT C · 7,320 ft

2017-06-05

#682587 Drill Y

VOLLMERT "C" · 11,300 ft

2009-07-01

Spud 2009-07-19

Applications (2)

#827208 A UNIT PETROLEUM COMPANY

received 2017-05-26

#682587 A UNIT PETROLEUM COMPANY

received 2009-06-29

Records & Logs

3 completion filings on record · 1 with log images at RRC.

W-2/G-1 2017-10-03

W-2/G-1 2010-01-21 log on file

W-2/G-1 2010-02-24

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 35.859401

Lon -100.530923

Well Details

Well Number: 10
Max Depth: 11,300 ft
Drill Type: Vertical
County: HEMPHILL
District: 10
Operator: UNIT PETROLEUM COMPANY
Completed: 2009-10-19

Operator

Name: UNIT PETRO CO
Location: TULSA
P-5 Status: Active (filed 2025-01-13)
Cum Oil (all leases): 8,610,362 bbl
Cum Gas (all leases): 788,031,686 mcf
Activities: CSGD/P, G/PUR, GTHS/G, OPRS/G, OPRS/O
Total Permits: 1,100