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Important subsurface definitions for petroleum industry

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05-09-2021 Geology 857

RESERVOIR ROCK •Porosity: the percent by volume of pore space in the rock -how much fluid or gas will fit between the grains (%) •Permeability: the measure of the degree of difficulty the fluid or gas has in moving through the rock (darcies or millidarcy)

type of porosity

Types of Porosity on sandstone • Intergranular (primary) • Dissolution (secondary) • Fracture • Clays deposited (microporosity)

Traps

Types of Hydrocarbon Traps • Structural • Stratigraphic • Combination • Unconventional (basin-centered, coalbed methane, shale gas)


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