ShellCreekShale
Mon
tana
Gro
upC
olor
ado
Gro
up
Col
orad
o G
roup
Mon
tana
Gro
up
MuddySandstone
272511105123
Lawrence Barker1 Weinz et al.
Sec. 18, T. 03 N., R. 31 E.Yellowstone Co.
KB 2,858 ft
Pompey's Pillar
282511121152
Robert JackmanA Horton
Sec. 18, T. 07 N., R. 32 E.Yellowstone Co.
KB 3,463 ft
Wolf Springs
292508721482
Gear Petroleum44-7 Hougen
Sec. 07, T. 09 N., R. 32 E.Rosebud Co.
KB 3,191 ft
Injun Creek
302508705095
ContinentalOil1 NP
Sec. 29, T. 10 N., R. 32 E.Rosebud Co.
KB 3,306 ft
SE Bascomb
312508705295Texaco Inc.3-A Grebe
Sec. 15, T. 11 N., R. 32 E.Rosebud Co.
KB 3,001 ft
NW Sumatra
322508721298
Petro-Lewis Corp.16-36 State
Sec. 36, T. 12 N., R. 32 E.Rosebud Co.
KB 3,137 ft
Rattler Butte
332508721491
Hunt Oil1-28 Hunt Oil Co.
Sec. 28, T. 12 N., R. 33 E.Rosebud Co.
KB 3,152 ft
Wildcat
342508721550
Coastal Oil and Gas2 COGC 34-13-33 Galt
Sec. 34, T. 13 N., R. 33 E.Rosebud Co.
KB 3,072 ft
Breed Creek
352503321058
True Oil33-1 1 Burlington NorthernSec. 11, T. 14 N., R. 34 E.
Garfield Co.GR 3,496 ft
Wildcat
362503305061
Shell OilN P 41-29R
Sec. 29, T. 15 N., R. 34 E.Garfield Co.KB 3,334 ft
Wildcat
372503321084
Atlantic Richfield1-36 State-Lodgepole
Sec. 36, T. 16 N., R. 33 E.Garfield Co.KB 3,239 ft
Wildcat
382503321030
Montana Power9-8 Federal
Sec. 08, T. 17 N., R. 31 E.Garfield Co.KB 2,949 ft
Wildcat
25 mi 13 mi 4 mi 9 mi 4 mi 3 mi 5 mi 11 mi 4 mi 5 mi 17 mi
TD 4,392 ftJurassic Morrison Formation
Drilled and Abandoned
DST: 2,015-2,020 ft (Eagle);SI 30 min., open 1 hr; rec 730 ft GCW;
FP 110-195, SIP 254, HP 1,030-980
DST: 4,346-4,355 (Kootenai [3rd Cat Creek]);SI 22 min., open 1 hr 4 min.;
flowed water to surface in 1 hour;FP 920-1980, SIP 1,978,
HP 2,390-2,360
TD 6,168 ftPennsylvanian Amsden
Formation
Oil production from Amsden
DST: 3,645-3,727 (Carlile Shale);open 15 min., SI 49 min., open 60 min.,
SI 120 min., rec. 30 ft mud, 2,000 cc VSGCM;FP 66-56, 121-141; SIP 386-382,
HP 1,729-1,688
TD 6,034 ftMississippian Otter Formation
Production from Tyler Fm (Penn.)No Cretaceous DST
TD 7,830 ftCambrian, unspecifedDrilled and Abandoned
DST: 3,080-3,159 (Mosby);SI 30 min., open 1 hour;
rec. 60 ft gas and water-cutmud, 2,010 ft gassy, muddy
fresh water;FP 950-980, SIP 1290,
HP 1530
TD 4,830 ftMississippian Heath Formation
Oil production from Tyler Fm (Penn.)
DST: 426-640 (Judith River andClaggett Shale); open 30 min.;
rec. 98 ft drilling mud;no pressure data available
TD 5,736 ftMississippian Heath Formation
Oil production from Tyler Fm (Penn.)No Cretaceous DST
TD 5,486 ftMississippian Heath Formation
Drilled and AbandonedNo DST
TD 5,000 ftMississippian Heath Formation
Oil production from Tyler Fm (Penn.)No DST TD 6,032 ft
Mississippian Heath FormationDrilled and Abandoned
DST: 1,720-1,740 (Judith River);open 1 hour, SI 1 hour, open 90 min.,
SI 90 min.; rec. 910 ft SMCW;FP 151-414; 445-445; SIP 445-447;
HP 920-856
TD 5,852 ftMississippian Otter Formation
Drilled and Abandoned
DST: 4,174-4,208 (Fall River Sandstone);open 1 hour, SI 45 min.;
rec. 3,060 ft water cut mud;FP 400(?)-1,415; SIP 1,700-1,655;
HP 2,330
TD 6,223 ftMississippian Charles Formation
Drilled and AbandonedNo Cretaceous DST
TD 4,940 ftJurassic Swift FormationDrilled and Abandoned
No DST
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4751
52
Judith RiverFormation
Claggett Shale
GammonShale
NiobraraFormation
CarlileShale
GreenhornFormation
BelleFourcheShale
MowryShale
SkullCreekShale
Basal siltunit of
Skull CreekShaleFall
RiverSandstone
KootenaiFormation
Jurassicrocks
JUR
AS
SIC
LOW
ER
CR
ET
AC
EO
US
UP
PE
R C
RE
TA
CE
OU
S
SeriesFormation
JudithRiver
Formation
ClaggettShale
GammonShale
NiobraraFormation
Car
lile
Sha
le
GreenhornFormation
BelleFourcheShale
MowryShale
Skull CreekShale
Basal siltunit of
Skull CreekShale
Fall RiverSandstone
KootenaiFormation
FormationSeries
UP
PE
R C
RE
TA
CE
OU
SLO
WE
R C
RE
TA
CE
OU
S
Fox HillsSandstone
BearpawShale
Fox HillsSandstone
BearpawShale
Jurassicrocks
JUR
AS
SIC
C C'SOUTH NORTH
Bull Mountains basin Sumatra anticline Sumatra syncline Blood Creek syncline
U.S. DEPARTMENT OF THE INTERIORU.S. GEOLOGICAL SURVEY
1
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4
Stratigraphic note:
1. Operator's pick of Shannon Sandstone at 2,016 ft
2. Operator's pick of Frontier Formation at 3,036 ft
3. Operator's pick of Dakota silt at 4,220 ft4. Operaor's pick of Greybull Formation
at 4,352 ft
Stratigraphic note:
1. Operator's pick of Dakota Formation at 4,590 ft
2. Operator's pick of 3rd Cat Creek at 4,893 ft
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Stratigraphic note:1. Operator's pick of Colorado Shale at 2,382 ft2. Operator's pick of Newcastle Ss at 3,947 ft3. Operator's pick of Dakota Formation at 4,036 ft4. Operator's pick of 1st Cat Creek at 4,150ft5. Operator's pick of 2nd Cat Creek at 4,3486. Operator's pick of 3rd Cat Creek at 4,422 ft
1
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3
Stratigraphic note:
1. Operator's pick of Colorado Shale at 1,383 ft
2. Operator's pick of 1st Cat Creek at 3,100 ft
3. Operator's pick of 3rd Cat Creek at 3,427 ft
1
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4
Stratigraphic note:
1. Operator's pick of Colorado Shale at 2,080 ft
2. Operator's pick of Dakota silt at 3,975 ft
3. Operator's pick of Dakota sand at 4,084 ft
4. Operator's pick of 2nd Cat Creek at 4,330 ft
5. Operator's pick of 3rd Cat Creek at 4,400 ft
5
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3
Stratigraphic note:
1. Operator's pick of Thermopolis Shale at 3,651 ft
2. Operator's pick of Dakota Formation at 3,974 ft
3. Operator's pick of Fuson Formation at 4,062 ft
1
2
Stratigraphic note:
1. Operator's pick of Niobrara Formation at 1,597 ft
2. Operator's pick of Dakota Formation at 3,352 ft
3. Operator's pick of 3rd Cat Creek at 3,788 ft
1
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4
Stratigraphic note:1. Operator's pick of Dakota silt at 4,362 ft2. Operator's pick of Dakota sand at 4,475 ft3. Operator's pick of 2nd Cat Creek at 4,750 ft4. Operator's pick of 3rd Cat Creek at 4,852 ft
1
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3
Stratigraphic note:
1. Opertor's pick of Newcastle Sandstone at 3,968 ft
2. Operator's pick of 1st Cat Creek at 4,170 ft
3. Operator's pick of 3rd Cat Creek at 4,555 ft
12
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4
Stratigraphic note:
1. Operator's pick of Niobrara Formation at 3,301 ft
2. Operator's pick of Greenhorn Formation at 3,362 ft
3. Operator's pick of Dakota silt at 4,637 ft
4. Operator's pick of Dakota sand at 4,752 ft
5. Operator's pick of Fuson Formation at 4,836 ft
6. Operator's pick of Lakota Formation at 5,008 ft
1
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Stratigraphic note:
1. Operator's pick of Dakota silt at 4,188 ft2. Operator's pick of Dakota sand at 4,286 ft3. Operator's pick of Kootenai Formation
at 4,368 ft4. Operator's pick of 2nd Cat Creek at 4,498 ft5. Operator's pick of Lakota Formation
at 4,637 ft
0
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FEET
Mos
byS
ands
tone
Mem
ber
Mos
byS
ands
tone
Mem
ber
1
Stratigraphic note:
1. Operator's pick of ColoradoShale at 3,347 ft
Morrison Formation
3
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4
Shell Creek Shale
Group
or MemberGroupor Member
MuddySandstone
DIGITAL DATA SERIESDDS-57
PLATE 4
Fort UnionFormation
andHell CreekFormation Hell Creek
Formation
Fox HillsSandstone
CROSS SECTION C-C', FROM THE BULL MOUNTAINS BASIN TO THE BLOOD CREEK SYNCLINE, NORTHEASTERN MONTANA
STRATIGRAPHIC FRAMEWORK OF LOWER AND UPPER CRETACEOUS ROCKS IN CENTRAL AND EASTERN MONTANABy
Steven M. Condon2000
