Category: Mechanical Energy

Events Chart

The petroleum-system events chart shows the tem­poral relationship of the rock units, essentialelements, processes, preservation, and critical mo­ment for each petroleum system in bar graph form (Fig. 2F; Table I). The events chart concept is flexible and is used as a risk chart to evaluate plays and prospects The events chart shows the following items […]

Critical Moment

The generation, migration, and accumulation of oil and gas in a petroleum system never starts when the source rock is being deposited and seldom extends into the present day. If a source rock is deposited in the Paleozoic, it may be the Mesozoic before it becomes thermally mature and charges adjacent traps, and by the […]

Burial History Chart

The purpose of the burial history chart is to show the essential elements, and three important hydrocarbon events, which are (1) the onset (O) of generation – migration-accumulation, (2) the partially spent or depleted (D) active source rock, and (3) the critical moment (CM) of the petroleum system (Fig. 2E; Table I). The top of […]

Petroleum System Name

The name of a petroleum system labels the hydro­carbon-fluid system or distribution network (Fig. 2D) in the same way the name Colorado River designates an aqueous distribution system, the river and its tributaries. The name of the petroleum system includes the geological formation names of the source rock followed by the major reservoir rock (Fig. […]

Cross Section

The petroleum system cross section (Fig. 2B; Table I), drawn at the critical moment, or time when most of the hydrocarbons were generated, shows the geo­graphic and stratigraphic extent of the petroleum system and how each rock unit functions within the system to distribute the oil and gas. Stratigraphically, the petroleum system includes a petroleum […]