main maracaibo basin, assessment unit 60990101...main maracaibo basin, assessment unit 60990101 0 50...

Main Maracaibo Basin, Assessment Unit 60990101

0

50

100

150

200

250

300

350

400

450

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

.)


0

5

10

15

20

25

30

35

1914

1917

1920

1923

1926

1929

1932

1935

1938

1941

1944

1947

1950

1953

1956

1959

1962

1965

1968

1971

1974

1977

1980

1983

1986

1989

1992

1995


NE

W-F

IEL

D W

ILD

CA

T W

EL

LS

(N

o.)


1

10

100

1,000

10,000

100,000

0 2 4 6 8 10 12 14 16

OIL-FIELD RANK BY SIZE

KN

OW

N O

IL-F

IEL

D S

IZE

(M

MB

O)

First third of fields discovered

Second third of fields discovered

Third third of fields discovered


0

1

2

3

4

5

6

7

8

1 to

<2

2 to

<4

4 to

<8

8 to

<16

16 to

<32

32 to

<64

64 to

<12

8

128

to <

256

256

to <

512

512

to <

1,02

4

1,02

4 to

<2,

048

2,04

8 to

<4,

096

4,09

6 to

<8,

192

8,19

2 to

<16

,384

16,3

84 to

<32

,768

32,7

68 to

<65

,536

65,5

36 to

<13

1,07

2

131,

072

to <

262,

144

>=26

2,14

4

KNOWN OIL-FIELD SIZE (MMBO)

OIL

FIE

LD

S (

No

.)

Third third offieldsdiscovered

Second thirdof fieldsdiscovered

First third offieldsdiscovered


0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

1 to

<2

2 to

<4

4 to

<8

8 to

<16

16 to

<32

32 to

<64

64 to

<12

8

128

to <

256

256

to <

512

512

to <

1,02

4

1,02

4 to

<2,

048

2,04

8 to

<4,

096

4,09

6 to

<8,

192

8,19

2 to

<16

,384

16,3

84 to

<32

,768

32,7

68 to

<65

,536

65,5

36 to

<13

1,07

2

131,

072

to <

262,

144

>=26

2,14

4

KNOWN OIL-FIELD SIZE (MMBO)

VO

LU

ME

OF

OIL

(M

MB

O)


1

10

100

1,000

10,000

100,000

1910 1920 1930 1940 1950 1960 1970 1980 1990 2000

FIELD-DISCOVERY YEAR

KN

OW

N O

IL-F

IEL

D S

IZE

(M

MB

O)


1

10

100

1,000

10,000

100,000

0 50 100 150 200 250 300 350 400 450

CUM. NEW-FIELD WILDCAT WELLS (No.)

KN

OW

N O

IL-F

IEL

D S

IZE

(M

MB

O)


0

10,000

20,000

30,000

40,000

50,000

60,000

1910 1920 1930 1940 1950 1960 1970 1980 1990 2000


CU

M. K

NO

WN

OIL

VO

LU

ME

(M

MB

O)


0

10,000

20,000

30,000

40,000

50,000

60,000

0 50 100 150 200 250 300 350 400 450


CU

M. K

NO

WN

OIL

VO

LU

ME

(M

MB

O)


0

5

10

15

20

25

30

35

40

45

50

1910 1920 1930 1940 1950 1960 1970 1980 1990 2000


CU

M. O

IL F

IEL

DS

(N

o.)


0

5

10

15

20

25

30

35

40

45

50

0 50 100 150 200 250 300 350 400 450


CU

M. O

IL F

IEL

DS

(N

o.)


0

1,000

2,000

3,000

4,000

5,000

6,000

1910 1920 1930 1940 1950 1960 1970 1980 1990 2000


RE

SE

RV

OIR

DE

PT

H, O

IL F

IEL

DS

(m

)


0

1,000

2,000

3,000

4,000

5,000

6,000

0 50 100 150 200 250 300 350 400 450


RE

SE

RV

OIR

DE

PT

H, O

IL F

IEL

DS

(m

)


0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

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

MEAN RESERVOIR DEPTH (m)

GA

S/O

IL, O

IL F

IEL

DS

(C

FG

/BO

)


0

20

40

60

80

100

120

140

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


NG

L/G

AS

, OIL

FIE

LD

S (

BN

GL

/MM

CF

G)


0

5

10

15

20

25

30

35

40

45

50

0 to <10 10 to<20

20 to<30

30 to<40

40 to<50

50 to<60

60 to<70

70 to<80

80 to<90

90 to<100

>=100

API GRAVITY (DEGREES)

RE

SE

RV

OIR

S IN

OIL

FIE

LD

S (

No

.)


0

50

100

150

200

250

300

350

400

450

1910 1920 1930 1940 1950 1960 1970 1980 1990 2000


CU

M. N

EW

-FIE

LD

WIL

DC

AT

WE

LL

S (

No

.)


0

5

10

15

20

25

30

35

1914

1917

1920

1923

1926

1929

1932

1935

1938

1941

1944

1947

1950

1953

1956

1959

1962

1965

1968

1971

1974

1977

1980

1983

1986

1989

1992

1995


NE

W-F

IEL

D W

ILD

CA

T W

EL

LS

(N

o.)


1

10

100

1,000

10,000

100,000

0 2 4 6 8 10 12 14 16

OIL-FIELD RANK BY SIZE

GR

OW

N O

IL-F

IEL

D S

IZE

(M

MB

O)

First third of fields discovered

Second third of fields discovered

Third third of fields discovered


0

1

2

3

4

5

6

7

8

9

1 to

<2

2 to

<4

4 to

<8

8 to

<16

16 to

<32

32 to

<64

64 to

<12

8

128

to <

256

256

to <

512

512

to <

1,02

4

1,02

4 to

<2,

048

2,04

8 to

<4,

096

4,09

6 to

<8,

192

8,19

2 to

<16

,384

16,3

84 to

<32

,768

32,7

68 to

<65

,536

65,5

36 to

<13

1,07

2

131,

072

to <

262,

144

>=26

2,14

4

GROWN OIL-FIELD SIZE (MMBO)

OIL

FIE

LD

S (

No

.)

Third third offieldsdiscovered

Second thirdof fieldsdiscovered

First third offieldsdiscovered


0

5,000

10,000

15,000

20,000

25,000

30,000

1 to

<2

2 to

<4

4 to

<8

8 to

<16

16 to

<32

32 to

<64

64 to

<12

8

128

to <

256

256

to <

512

512

to <

1,02

4

1,02

4 to

<2,

048

2,04

8 to

<4,

096

4,09

6 to

<8,

192

8,19

2 to

<16

,384

16,3

84 to

<32

,768

32,7

68 to

<65

,536

65,5

36 to

<13

1,07

2

131,

072

to <

262,

144

>=26

2,14

4

GROWN OIL-FIELD SIZE (MMBO)

VO

LU

ME

OF

OIL

(M

MB

O)


1

10

100

1,000

10,000

100,000

1910 1920 1930 1940 1950 1960 1970 1980 1990 2000


GR

OW

N O

IL-F

IEL

D S

IZE

(M

MB

O)


1

10

100

1,000

10,000

100,000

0 50 100 150 200 250 300 350 400 450


GR

OW

N O

IL-F

IEL

D S

IZE

(M

MB

O)


0

10,000

20,000

30,000

40,000

50,000

60,000

1910 1920 1930 1940 1950 1960 1970 1980 1990 2000


CU

M. G

RO

WN

OIL

VO

LU

ME

(M

MB

O)


0

10,000

20,000

30,000

40,000

50,000

60,000

0 50 100 150 200 250 300 350 400 450


CU

M. G

RO

WN

OIL

VO

LU

ME

(M

MB

O)


0

5

10

15

20

25

30

35

40

45

50

1910 1920 1930 1940 1950 1960 1970 1980 1990 2000


CU

M. O

IL F

IEL

DS

(N

o.)


0

5

10

15

20

25

30

35

40

45

50

0 50 100 150 200 250 300 350 400 450


CU

M. O

IL F

IEL

DS

(N

o.)


0

1,000

2,000

3,000

4,000

5,000

6,000

1910 1920 1930 1940 1950 1960 1970 1980 1990 2000


RE

SE

RV

OIR

DE

PT

H, O

IL F

IEL

DS

(m

)


0

1,000

2,000

3,000

4,000

5,000

6,000

0 50 100 150 200 250 300 350 400 450


RE

SE

RV

OIR

DE

PT

H, O

IL F

IEL

DS

(m

)


0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

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


GA

S/O

IL, O

IL F

IEL

DS

(C

FG

/BO

)


0

20

40

60

80

100

120

140

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


NG

L/G

AS

, OIL

FIE

LD

S (

BN

GL

/MM

CF

G)


0

5

10

15

20

25

30

35

40

45

50

0 to <10 10 to<20

20 to<30

30 to<40

40 to<50

50 to<60

60 to<70

70 to<80

80 to<90

90 to<100

>=100

API GRAVITY (DEGREES)

RE

SE

RV

OIR

S IN

OIL

FIE

LD

S (

No

.)

Main Maracaibo Basin, Assessment Unit 60990101Volumes 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 45 48,209 24,169 1 46 59,108 30,398 1Gas Fields 3 0 748 25 3 0 1,050 30

Fields <1 MMBOE 11 2 1 0 10 2 1 0

All Fields 59 48,211 24,918 26 59 59,110 31,448 31

Page 1

Main Maracaibo Basin, Assessment Unit 60990101Discovery-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)First third 1914-1950 15 35,236 2,349 514Second third 1963 15 11,531 769 158Third third 1994 15 1,442 96 72

All Oil Fields 45 48,209 1,071 150Gas Fields Known Sizes (BCFG)

First third NA NA NA NA NASecond third NA NA NA NA NAThird third NA NA NA NA NA

All Gas Fields NA NA NA NA

Page 2

Main Maracaibo Basin, Assessment Unit 60990101Discovery-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)First third 1914-1950 15 41,986 2,799 613Second third 1973 16 14,987 937 199Third third 1994 15 2,135 142 72

All Oil Fields 46 59,108 1,285 176Gas Fields Grown Sizes (BCFG)

First third NA NA NA NA NASecond third NA NA NA NA NAThird third NA NA NA NA NA

All Gas Fields NA NA NA NA

Page 3

main maracaibo basin, assessment unit 60990101...main maracaibo basin, assessment unit 60990101 0 50...

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