Pierre Shale Sandstones, Assessment Unit 50390601

Pierre Shale Sandstones, Assessment Unit 50390601

12,000

CUM. NEW-FIELD WILDCAT WELLS (No.) 10,000

8,000

6,000

4,000

2,000

0 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000

1900

DRILLING-COMPLETION YEAR

Pierre Shale Sandstones, Assessment Unit 50390601
NEW-FIELD WILDCAT WELLS (No.)

800 1901
700 1905
600 1909
500 1913
400 1917
300 1921
200 1925
100 1929
1933
0 1937
1941
DRILLING-COMPLETION YEAR
1945
1949
1953
1957
1961
1965
1969
1973
1977
1981
1985
1989
1993
1997

KNOWN GAS-ACCUMULATION SIZE (BCFG)
Pierre Shale Sandstones, Assessment Unit 50390601

100

First half of accumulations discovered
10 Second half of accumulations

discovered

1
01234

GAS-ACCUMULATION RANK BY SIZE

Pierre Shale Sandstones, Assessment Unit 50390601

2

GAS ACCUMULATIONS (No.) Second half of accumulations

1 discovered
First half of accumulations discovered

0

78169,6414,3296,,23021,t88507ot82761ott28<9oo1tt<2,14oo3t528<<o7299tt<<34823oot16,,,,<,,o5382351<<706183429<4664464466

KNOWN GAS-ACCUMULATION SIZE (BCFG)

VOLUME OF GAS (BCFG)


Pierre Shale Sandstones, Assessment Unit 5039060178136999,1284634249,,36,6232,,,,130125110,,86t48745570o862>3674ttt13oo<o682=ttt9t89oooo11<<<ttt246124ooo,,<<<<375248615ttt<<oo<7o249998317tttt498326oooo261362<<<t,,,,,,,,,o,,,5132846<<<<237150187501638086<37424991664286248486242244866

50
45
40
35
30
25
20
15
10

5
0

KNOWN GAS-ACCUMULATION SIZE (BCFG)

Pierre Shale Sandstones, Assessment Unit 50390601

100


KNOWN GAS-ACCUMULATION SIZE (BCFG)
10


1
1910 1920 1930 1940 1950 1960 1970 1980 1990 2000

1900

ACCUMULATION-DISCOVERY YEAR

Pierre Shale Sandstones, Assessment Unit 50390601

100

KNOWN GAS-ACCUMULATION SIZE (BCFG)
10

1

0 2,000 4,000 6,000 8,000 10,000 12,000

CUM. NEW-FIELD WILDCAT WELLS (No.)

Pierre Shale Sandstones, Assessment Unit 50390601


CUM. KNOWN GAS VOLUME (BCFG) 100
90
80 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000

70
60
50
40
30
20
10
0
1900

ACCUMULATION-DISCOVERY YEAR

Pierre Shale Sandstones, Assessment Unit 50390601


CUM. KNOWN GAS VOLUME (BCFG) 100
90
80 2,000 4,000 6,000 8,000 10,000 12,000
70
60
50
40
30
20
10
0
0

CUM. NEW-FIELD WILDCAT WELLS (No.)

Pierre Shale Sandstones, Assessment Unit 50390601

4


CUM. GAS ACCUMULATIONS (No.)
3


2


1


0 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
1900

ACCUMULATION-DISCOVERY YEAR

Pierre Shale Sandstones, Assessment Unit 50390601


4

CUM. GAS ACCUMULATIONS (No.) 3

2

1

0

0 2,000 4,000 6,000 8,000 10,000 12,000

CUM. NEW-FIELD WILDCAT WELLS (No.)

Pierre Shale Sandstones, Assessment Unit 50390601

0

RESERVOIR DEPTH, GAS ACCUMULATIONS
1,000
(ft)

2,000

3,000

4,000

5,000

6,000 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
1900
RESERVOIR-DISCOVERY YEAR

Pierre Shale Sandstones, Assessment Unit 50390601

0

RESERVOIR DEPTH, GAS ACCUMULATIONS
1,000
(ft)

2,000

3,000

4,000

5,000

6,000 2,000 4,000 6,000 8,000 10,000 12,000
0

CUM. NEW-FIELD WILDCAT WELLS (No.)

Pierre Shale Sandstones, Assessment Unit 50390601


140

LIQUIDS/GAS, GAS ACCUMULATIONS 120
(BL/MMCFG)
100

80

60

40

20

0

0 1,000 2,000 3,000 4,000 5,000 6,000

MEAN RESERVOIR DEPTH (ft)

KNOWN OIL-ACCUMULATION SIZE (MMBO)
Pierre Shale Sandstones, Assessment Unit 50390601


100

10
First half of accumulations discovered
Second half of accumulations
discovered

1

0
01234

OIL-ACCUMULATION RANK BY SIZE

Pierre Shale Sandstones, Assessment Unit 50390601

2

OIL ACCUMULATIONS (No.) Second half of accumulations

1 discovered
First half of accumulations discovered

0

KNOWN OIL-ACCUMULATION SIZE (MMBO)

0.5 to <1
2 to <4

1313,280,,2771,29605 t82411ott822oott<83oo2t<28<o66tt<<1526oo14,,,<,,513002<<3485926146466464

VOLUME OF OIL (MMBO)


Pierre Shale Sandstones, Assessment Unit 503906011365113,62,805,,,21473713,,,2968600054822941tt12oo4862ttt52>6ooo<<tttt684=13oooo0<<<216282ttt.<<<<oo336o6511426ttt25261ooo12482<<<tttt,,,,,o,,,,ooo,17503<<<101005214638<7514992<<<2631444268266824861442428

70
60

50

40

30

20

10


0


KNOWN OIL-ACCUMULATION SIZE (MMBO)

Pierre Shale Sandstones, Assessment Unit 50390601

100

KNOWN OIL-ACCUMULATION SIZE (MMBO)
10

1

0 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
1900

ACCUMULATION-DISCOVERY YEAR

Pierre Shale Sandstones, Assessment Unit 50390601


100

KNOWN OIL-ACCUMULATION SIZE (MMBO)
10

1

0

0 2,000 4,000 6,000 8,000 10,000 12,000

CUM. NEW-FIELD WILDCAT WELLS (No.)

Pierre Shale Sandstones, Assessment Unit 50390601


CUM. KNOWN OIL VOLUME (MMBO) 100
90
80 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000

70
60
50
40
30
20
10
0
1900

ACCUMULATION-DISCOVERY YEAR

Pierre Shale Sandstones, Assessment Unit 50390601

CUM. KNOWN OIL VOLUME (MMBO)
100
90
80 2,000 4,000 6,000 8,000 10,000 12,000
70
60
50
40
30
20
10
0
0

CUM. NEW-FIELD WILDCAT WELLS (No.)

Pierre Shale Sandstones, Assessment Unit 50390601

5


CUM. OIL ACCUMULATIONS (No.)
4


3


2


1


0 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
1900

ACCUMULATION-DISCOVERY YEAR

Pierre Shale Sandstones, Assessment Unit 50390601

5

CUM. OIL ACCUMULATIONS (No.)
4

3

2

1

0

0 2,000 4,000 6,000 8,000 10,000 12,000

CUM. NEW-FIELD WILDCAT WELLS (No.)

Pierre Shale Sandstones, Assessment Unit 50390601

0

RESERVOIR DEPTH, OIL ACCUMULATIONS
1,000
(ft)

2,000

3,000

4,000

5,000

6,000 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
1900
RESERVOIR-DISCOVERY YEAR

Pierre Shale Sandstones, Assessment Unit 50390601

0

RESERVOIR DEPTH, OIL ACCUMULATIONS
1,000
(ft)

2,000

3,000

4,000

5,000

6,000 2,000 4,000 6,000 8,000 10,000 12,000
0

CUM. NEW-FIELD WILDCAT WELLS (No.)

Pierre Shale Sandstones, Assessment Unit 50390601


GAS/OIL, OIL ACCUMULATIONS (CFG/BO) 18,000
16,000
14,000 1,000 2,000 3,000 4,000 5,000 6,000
12,000
10,000

8,000
6,000
4,000
2,000

0
0

MEAN RESERVOIR DEPTH (ft)

Pierre Shale Sandstones, Assessment Unit 50390601


NGL/GAS, OIL ACCUMULATIONS 200
(BNGL/MMCFG) 180
160
140 1,000 2,000 3,000 4,000 5,000 6,000
120
100

80
60
40
20

0
0

MEAN RESERVOIR DEPTH (ft)

RESERVOIRS IN OIL ACCUMULATIONS (No.)


Pierre Shale Sandstones, Assessment Unit 50390601 0 to <10
10 to <20
4
20 to <30
3
30 to <40
2
40 to <50
1
50 to <60
0 60 to <70
70 to <80
API GRAVITY (DEGREES) 80 to <90
90 to <100

>=100