Petroleum system size
The size of a petroleum system includes the total volume of all recoverable hydrocarbons that originated from a single pod of active source rock. This total volume is used to compare against other petroleum systems and to determine the generation–accumulation efficiency.
Volume of petroleum[edit]
The discovered hydrocarbons include shows, seeps, and accumulations of oil and gas. The size of a petroleum system is determined using a table such as the following for the fields in the Deer-Boar(.) system, with reserves of approximately 1.2 billion barrels (bbl).
| Field Name | Discovery Date | Reservoir Rock | API Gravity (°API) | Cum. Oil Production (x106 bbl) | Remaining Reserves (x106 bbl) |
|---|---|---|---|---|---|
| Big Oil | 1954 | Boar Ss | 32 | 310 | 90 |
| Raven | 1956 | Boar Ss | 31 | 120 | 12 |
| Owens | 1959 | Boar Ss | 33 | 110 | 19 |
| Just | 1966 | Boar Ss | 34 | 160 | 36 |
| Hardy | 1989 | Boar Ss | 29 | 85 | 89 |
| Lucky | 1990 | Boar Ss | 15 | 5 | 70 |
| Marginal | 1990 | Boar Ss | 18 | 12 | 65 |
| Teapot | 1992 | Boar Ss | 21 | 9 | 34 |
| Total | 811 + | 415 | |||
Generation-accumulation efficiency[edit]
Generation–accumulation efficiency is the ratio (expressed as a percentage) of the total volume of trapped (in-place) petroleum in the petroleum system to the total volume of petroleum generated from the pod of active source rock.
See also[edit]
- Petroleum system
- Petroleum system identification
- Petroleum system naming
- Petroleum system: geographic, stratigraphic, and temporal extent
External links[edit]
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