Orinoco Heavy Oil and Tar Belt, Assessment Unit 60980104 · Orinoco Heavy Oil and Tar Belt,...

Orinoco Heavy Oil and Tar Belt, Assessment Unit 60980104

0

50

100

150

200

250

300

350

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

10

20

30

40

50

60

70

80

90

100

1937

1940

1943

1946

1949

1952

1955

1958

1961

1964

1967

1970

1973

1976

1979

1982

1985

1988

1991

1994


NE

W-F

IEL

D W

ILD

CA

T W

EL

LS

(N

o.)


1

10

100

1,000

10,000

0 1 2 3 4

OIL-FIELD RANK BY SIZE

KN

OW

N O

IL-F

IEL

D S

IZE

(M

MB

O)

First half of fields discovered

Second half of fields discovered


0

1

2

3

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

.)

Second halfof fieldsdiscovered

First half offieldsdiscovered


0

500

1,000

1,500

2,000

2,500

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

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

0 50 100 150 200 250 300 350

CUM. NEW-FIELD WILDCAT WELLS (No.)

KN

OW

N O

IL-F

IEL

D S

IZE

(M

MB

O)


0

1,000

2,000

3,000

4,000

5,000

6,000

1930 1940 1950 1960 1970 1980 1990 2000


CU

M. K

NO

WN

OIL

VO

LU

ME

(M

MB

O)


0

1,000

2,000

3,000

4,000

5,000

6,000

0 50 100 150 200 250 300 350


CU

M. K

NO

WN

OIL

VO

LU

ME

(M

MB

O)


0

1

2

3

4

5

6

7

8

1930 1940 1950 1960 1970 1980 1990 2000


CU

M. O

IL F

IEL

DS

(N

o.)


0

1

2

3

4

5

6

7

8

0 50 100 150 200 250 300 350


CU

M. O

IL F

IEL

DS

(N

o.)


0

200

400

600

800

1,000

1,200

1,400

1,600

1,800

2,000

1930 1940 1950 1960 1970 1980 1990 2000


RE

SE

RV

OIR

DE

PT

H, O

IL F

IEL

DS

(m

)


0

200

400

600

800

1,000

1,200

1,400

1,600

1,800

2,000

0 50 100 150 200 250 300 350


RE

SE

RV

OIR

DE

PT

H, O

IL F

IEL

DS

(m

)


0

20

40

60

80

100

120

0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000

MEAN RESERVOIR DEPTH (m)

GA

S/O

IL, O

IL F

IEL

DS

(C

FG

/BO

)


0

1

2

3

4

5

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

1930 1940 1950 1960 1970 1980 1990 2000


CU

M. N

EW

-FIE

LD

WIL

DC

AT

WE

LL

S (

No

.)


0

10

20

30

40

50

60

70

80

90

100

1937

1940

1943

1946

1949

1952

1955

1958

1961

1964

1967

1970

1973

1976

1979

1982

1985

1988

1991

1994


NE

W-F

IEL

D W

ILD

CA

T W

EL

LS

(N

o.)


1

10

100

1,000

10,000

0 1 2 3 4

OIL-FIELD RANK BY SIZE

GR

OW

N O

IL-F

IEL

D S

IZE

(M

MB

O)

First half of fields discovered

Second half of fields discovered


0

1

2

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

.)

Second halfof fieldsdiscovered

First half offieldsdiscovered


0

500

1,000

1,500

2,000

2,500

3,000

3,500

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

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

0 50 100 150 200 250 300 350


GR

OW

N O

IL-F

IEL

D S

IZE

(M

MB

O)


0

1,000

2,000

3,000

4,000

5,000

6,000

1930 1940 1950 1960 1970 1980 1990 2000


CU

M. G

RO

WN

OIL

VO

LU

ME

(M

MB

O)


0

1,000

2,000

3,000

4,000

5,000

6,000

0 50 100 150 200 250 300 350


CU

M. G

RO

WN

OIL

VO

LU

ME

(M

MB

O)


0

1

2

3

4

5

6

7

8

1930 1940 1950 1960 1970 1980 1990 2000


CU

M. O

IL F

IEL

DS

(N

o.)


0

1

2

3

4

5

6

7

8

0 50 100 150 200 250 300 350


CU

M. O

IL F

IEL

DS

(N

o.)


0

200

400

600

800

1,000

1,200

1,400

1,600

1,800

2,000

1930 1940 1950 1960 1970 1980 1990 2000


RE

SE

RV

OIR

DE

PT

H, O

IL F

IEL

DS

(m

)


0

200

400

600

800

1,000

1,200

1,400

1,600

1,800

2,000

0 50 100 150 200 250 300 350


RE

SE

RV

OIR

DE

PT

H, O

IL F

IEL

DS

(m

)


0

20

40

60

80

100

120

0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000

MEAN RESERVOIR DEPTH (m)

GA

S/O

IL, O

IL F

IEL

DS

(C

FG

/BO

)


0

1

2

3

4

5

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

.)

Orinoco Heavy Oil and Tar Belt, Assessment Unit 60980104Volumes 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 7 3,755 60 0 7 5,574 74 0Gas Fields 0 0 0 0 0 0 0 0

Fields <1 MMBOE 2 0 0 0 2 0 0 0

All Fields 9 3,755 60 0 9 5,574 74 0

Page 1

Orinoco Heavy Oil and Tar Belt, Assessment Unit 60980104Discovery-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 half 1939-1980 4 730 183 60Second half 1984 3 3,025 1,008 1,000

All Oil Fields 7 3,755 536 100Gas 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

Orinoco Heavy Oil and Tar Belt, Assessment Unit 60980104Discovery-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 half 1939-1980 4 934 234 92Second half 1984 3 4,639 1,546 1,534

All Oil Fields 7 5,574 796 153Gas 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

Orinoco Heavy Oil and Tar Belt, Assessment Unit 60980104 · Orinoco Heavy Oil and Tar Belt,...

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Transcript of Orinoco Heavy Oil and Tar Belt, Assessment Unit 60980104 · Orinoco Heavy Oil and Tar Belt,...