Foreland Basin, Assessment Unit 40470101 0 50 100 150 200 250 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 DRILLING-COMPLETION YEAR CUM. NEW-FIELD WILDCAT WELLS (No.)
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Foreland Basin, Assessment Unit 40470101
0
50
100
150
200
250
1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
DRILLING-COMPLETION YEAR
CU
M. N
EW
-FIE
LD
WIL
DC
AT
WE
LL
S (
No
.)
Foreland Basin, Assessment Unit 40470101
0
2
4
6
8
10
12
14
16
18
1912
1916
1920
1924
1928
1932
1936
1940
1944
1948
1952
1956
1960
1964
1968
1972
1976
1980
1984
1988
1992
DRILLING-COMPLETION YEAR
NE
W-F
IEL
D W
ILD
CA
T W
EL
LS
(N
o.)
Foreland Basin, Assessment Unit 40470101
1
10
100
1,000
10,000
0 2 4 6 8 10 12 14 16
GAS-FIELD RANK BY SIZE
KN
OW
N G
AS
-FIE
LD
SIZ
E (
BC
FG
)
First third of fields discovered
Second third of fields discovered
Third third of fields discovered
Foreland Basin, Assessment Unit 40470101
0
2
4
6
8
10
12
6 to
<12
12 to
<24
24 to
<48
48 to
<96
96 to
<19
2
192
to <
384
384
to <
768
768
to <
1,53
6
1,53
6 to
<3,
072
3,07
2 to
<6,
144
6,14
4 to
<12
,288
12,2
88 to
<24
,576
24,5
76 to
<49
,152
49,1
52 to
<98
,304
98,3
04 to
<19
6,60
8
196,
608
to <
393,
216
393,
216
to <
786,
432
786,
432
to <
1,57
2,86
4
>=1,
572,
864
KNOWN GAS-FIELD SIZE (BCFG)
GA
S F
IEL
DS
(N
o.)
Third third offieldsdiscovered
Second thirdof fieldsdiscovered
First third offieldsdiscovered
Foreland Basin, Assessment Unit 40470101
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
4,500
6 to
<12
12 to
<24
24 to
<48
48 to
<96
96 to
<19
2
192
to <
384
384
to <
768
768
to <
1,53
6
1,53
6 to
<3,
072
3,07
2 to
<6,
144
6,14
4 to
<12
,288
12,2
88 to
<24
,576
24,5
76 to
<49
,152
49,1
52 to
<98
,304
98,3
04 to
<19
6,60
8
196,
608
to <
393,
216
393,
216
to <
786,
432
786,
432
to <
1,57
2,86
4
>=1,
572,
864
KNOWN GAS-FIELD SIZE (BCFG)
VO
LU
ME
OF
GA
S (
BC
FG
)
Foreland Basin, Assessment Unit 40470101
1
10
100
1,000
10,000
1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
FIELD-DISCOVERY YEAR
KN
OW
N G
AS
-FIE
LD
SIZ
E (
BC
FG
)
Foreland Basin, Assessment Unit 40470101
1
10
100
1,000
10,000
0 50 100 150 200 250
CUM. NEW-FIELD WILDCAT WELLS (No.)
KN
OW
N G
AS
-FIE
LD
SIZ
E (
BC
FG
)
Foreland Basin, Assessment Unit 40470101
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
FIELD-DISCOVERY YEAR
CU
M. K
NO
WN
GA
S V
OL
UM
E (
BC
FG
)
Foreland Basin, Assessment Unit 40470101
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
0 50 100 150 200 250
CUM. NEW-FIELD WILDCAT WELLS (No.)
CU
M. K
NO
WN
GA
S V
OL
UM
E (
BC
FG
)
Foreland Basin, Assessment Unit 40470101
0
5
10
15
20
25
30
35
40
45
50
1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
FIELD-DISCOVERY YEAR
CU
M. G
AS
FIE
LD
S (
No
.)
Foreland Basin, Assessment Unit 40470101
0
5
10
15
20
25
30
35
40
45
50
0 50 100 150 200 250
CUM. NEW-FIELD WILDCAT WELLS (No.)
CU
M. G
AS
FIE
LD
S (
No
.)
Foreland Basin, Assessment Unit 40470101
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
FIELD-DISCOVERY YEAR
RE
SE
RV
OIR
DE
PT
H, G
AS
FIE
LD
S (
m)
Foreland Basin, Assessment Unit 40470101
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
0 50 100 150 200 250
CUM. NEW-FIELD WILDCAT WELLS (No.)
RE
SE
RV
OIR
DE
PT
H, G
AS
FIE
LD
S (
m)
Foreland Basin, Assessment Unit 40470101
0
5
10
15
20
25
30
35
0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000
MEAN RESERVOIR DEPTH (m)
LIQ
UID
S/G
AS
, GA
S F
IEL
DS
(B
L/M
MC
FG
)
Foreland Basin, Assessment Unit 40470101
0
50
100
150
200
250
1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
DRILLING-COMPLETION YEAR
CU
M. N
EW
-FIE
LD
WIL
DC
AT
WE
LL
S (
No
.)
Foreland Basin, Assessment Unit 40470101
0
2
4
6
8
10
12
14
16
18
1912
1916
1920
1924
1928
1932
1936
1940
1944
1948
1952
1956
1960
1964
1968
1972
1976
1980
1984
1988
1992
DRILLING-COMPLETION YEAR
NE
W-F
IEL
D W
ILD
CA
T W
EL
LS
(N
o.)
Foreland Basin, Assessment Unit 40470101
1
10
100
1,000
10,000
0 2 4 6 8 10 12 14 16 18
GAS-FIELD RANK BY SIZE
GR
OW
N G
AS
-FIE
LD
SIZ
E (
BC
FG
)
First third of fields discovered
Second third of fields discovered
Third third of fields discovered
Foreland Basin, Assessment Unit 40470101
0
2
4
6
8
10
12
14
6 to
<12
12 to
<24
24 to
<48
48 to
<96
96 to
<19
2
192
to <
384
384
to <
768
768
to <
1,53
6
1,53
6 to
<3,
072
3,07
2 to
<6,
144
6,14
4 to
<12
,288
12,2
88 to
<24
,576
24,5
76 to
<49
,152
49,1
52 to
<98
,304
98,3
04 to
<19
6,60
8
196,
608
to <
393,
216
393,
216
to <
786,
432
786,
432
to <
1,57
2,86
4
>=1,
572,
864
GROWN GAS-FIELD SIZE (BCFG)
GA
S F
IEL
DS
(N
o.)
Third third offieldsdiscovered
Second thirdof fieldsdiscovered
First third offieldsdiscovered
Foreland Basin, Assessment Unit 40470101
0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
6 to
<12
12 to
<24
24 to
<48
48 to
<96
96 to
<19
2
192
to <
384
384
to <
768
768
to <
1,53
6
1,53
6 to
<3,
072
3,07
2 to
<6,
144
6,14
4 to
<12
,288
12,2
88 to
<24
,576
24,5
76 to
<49
,152
49,1
52 to
<98
,304
98,3
04 to
<19
6,60
8
196,
608
to <
393,
216
393,
216
to <
786,
432
786,
432
to <
1,57
2,86
4
>=1,
572,
864
GROWN GAS-FIELD SIZE (BCFG)
VO
LU
ME
OF
GA
S (
BC
FG
)
Foreland Basin, Assessment Unit 40470101
1
10
100
1,000
10,000
1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
FIELD-DISCOVERY YEAR
GR
OW
N G
AS
-FIE
LD
SIZ
E (
BC
FG
)
Foreland Basin, Assessment Unit 40470101
1
10
100
1,000
10,000
0 50 100 150 200 250
CUM. NEW-FIELD WILDCAT WELLS (No.)
GR
OW
N G
AS
-FIE
LD
SIZ
E (
BC
FG
)
Foreland Basin, Assessment Unit 40470101
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
FIELD-DISCOVERY YEAR
CU
M. G
RO
WN
GA
S V
OL
UM
E (
BC
FG
)
Foreland Basin, Assessment Unit 40470101
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
0 50 100 150 200 250
CUM. NEW-FIELD WILDCAT WELLS (No.)
CU
M. G
RO
WN
GA
S V
OL
UM
E (
BC
FG
)
Foreland Basin, Assessment Unit 40470101
0
10
20
30
40
50
60
1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
FIELD-DISCOVERY YEAR
CU
M. G
AS
FIE
LD
S (
No
.)
Foreland Basin, Assessment Unit 40470101
0
10
20
30
40
50
60
0 50 100 150 200 250
CUM. NEW-FIELD WILDCAT WELLS (No.)
CU
M. G
AS
FIE
LD
S (
No
.)
Foreland Basin, Assessment Unit 40470101
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
1910 1920 1930 1940 1950 1960 1970 1980 1990 2000
FIELD-DISCOVERY YEAR
RE
SE
RV
OIR
DE
PT
H, G
AS
FIE
LD
S (
m)
Foreland Basin, Assessment Unit 40470101
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
0 50 100 150 200 250
CUM. NEW-FIELD WILDCAT WELLS (No.)
RE
SE
RV
OIR
DE
PT
H, G
AS
FIE
LD
S (
m)
Foreland Basin, Assessment Unit 40470101
0
5
10
15
20
25
30
35
0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000
MEAN RESERVOIR DEPTH (m)
LIQ
UID
S/G
AS
, GA
S F
IEL
DS
(B
L/M
MC
FG
)
Foreland Basin, Assessment Unit 40470101Volumes of Discovered Petroleum
[MMBO, million barrels of oil. BCFG, billion cubic feet of gas. MMBNGL, million barrels of natural gas liquids. Fields containing less than 1 MMBO in oilfields or 6 BCFG in gas fields were not considered in the assessment. Fields were classified as oil or gas by the USGS. Fields without reported discoverydates were not included. NA means not applicable and is shown for volumes where only one field is present. Calculated values may not be equal to the
sums of the component values because numbers have been independently rounded.]
Known (Discovered) Volumes Grown (Discovered) VolumesField Type Number Number
of Fields Oil (MMBO) Gas (BCFG) NGL (MMBNGL) of Fields Oil (MMBO) Gas (BCFG) NGL (MMBNGL)
Oil Fields 0 0 0 0 0 0 0 0Gas Fields 46 0 10,525 3 53 0 13,288 5
Fields <1 MMBOE 68 1 64 0 61 2 48 0
All Fields 114 1 10,589 3 114 2 13,336 5
Page 1
Foreland Basin, Assessment Unit 40470101Discovery-History Sequence
[MMBO, million barrels of oil. BCFG, billion cubic feet of gas. Fields containing less than 1 MMBO in oil fields or 6 BCFG in gas fields werenot considered in the assessment. Fields were classified as oil or gas by the USGS. The first half or third shows year of first field discovery
as well as end of period. NA means not applicable and is shown where fewer than four fields are present.]
Discovery-History Sequence - Known (Discovered) VolumesFieldType Year Number of Total Mean Median
(End of Period) Fields Volume Size Size
Oil Fields Known Sizes (MMBO) 3First third NA NA NA NA NASecond third NA NA NA NA NAThird third NA 10,589 3 NA NA
All Oil Fields NA NA NA NAGas Fields Known Sizes (BCFG)
First third 1920-1960 15 8,462 564 300Second third 1972 16 1,481 93 46Third third 1995 15 582 39 19
All Gas Fields 46 10,525 229 45
Page 2
Foreland Basin, Assessment Unit 40470101Discovery-History Sequence
[MMBO, million barrels of oil. BCFG, billion cubic feet of gas. Fields containing less than 1 MMBO in oil fields or 6 BCFG in gas fields werenot considered in the assessment. Fields were classified as oil or gas by the USGS. The first half or third shows year of first field discovery
as well as end of period. NA means not applicable and is shown where fewer than four fields are present.]
Discovery-History Sequence - Grown (Discovered) VolumesFieldType Year Number of Total Mean Median
(End of Period) Fields Volume Size Size
Oil Fields Grown Sizes (MMBO) 3First third NA NA NA NA NASecond third NA NA NA NA NAThird third NA 10,589 3 NA NA
All Oil Fields NA NA NA NAGas Fields Grown Sizes (BCFG)
First third 1920-1960 18 10,479 582 292Second third 1978 18 1,990 111 52Third third 1995 17 819 48 25
All Gas Fields 53 13,288 251 45
Page 3
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