156
Statistical Methods for Estimating Petroleum Resources
barriers to lateral and vertical migration of liquids and gases. It must
be a confi ned system in which the processes of petroleum generation,
migration, and accumulation of oil and gas take place independently
from surrounding sediments.
This method is based on the process of formation, migration, and
accumulation of hydrocarbons. Spatial distribution of the total organic
carbon percentage can be mapped if adequate samples are obtained
and the organic carbon volume can be integrated for each source rock
Table 7.1. (Continued)
Gippsland
64
Central Graben
56
Dnieper–Donetz
50
Sirte
50
B. Rifted convergent
margin
E
I
North Sumatra
Maracaibo
95
92
Middle Magdalena
92
Vienna
88
Santa Maria
87
Cook Inlet
78
Ventura–Santa Barbara
77
Los Angeles
74
Java Sea
74
South Sumatra
72
Central Sumatra
68
Baku–Kura
54
San Joaquin–
Sacramento
49
C. Rifted passive
margin
E
A
C u a n z a
Sergipe–Alagoas
96
80
Campos
77
N.W. Shelf
75
Congo
73
Gabon
65
IV. Delta Basins C to E
A
Mahakan
80
Mackenzie
74
Niger
11
Mississippi
8
*Shape (areal): C, circular; E, elongate.
†Profi le: A, asymmetrical; I, irregular; S, symmetrical.
‡Percent of present basin reserve BOE (barrels of oil equivalent) in fi ve largest fi elds. Numbers
from Klemme (1975, 1986).