lecture 3 Flashcards
any sedi rock can be a source rock if….
buried deep enough, proper temps, proper pressure, thermally mature, succient organic matter
what are clints
part of coal surface where gas is aborbed along fractures
what is kerogen
the solid and insoluable organic constituents of sedi rocks
what are the three stages of the hydrocarbon maturity process
diagenisis, catagenisis, metagensis
what is diagenisis
the initial stages of alteration of sedi rocks and maturation of kerogen
what is catagenisis?
the physical and chemical alternation of sedi and pore fluids
what is metagensis
the last stage of maturation and conversion of organic matter to hydrocarbons
what is biogenic and microbrial gas?
gas (almost pure methane) generated near the surface
where is the oil window
7000 - 18000 ft (2300 - 5500 m)
what is the oil temp window?
150 - 300 degF (65 - 150 C)
what is themogenic gas?
gas generated at depths greater than 18000 ft and 300 degF, crude turns to graphite
what is vitrinite reflectance
a measure of thermal maturity of organic matter in sedi rock
what are causes of HC migration
overburden pressure, volume increase due to maturation. capillary imibition, diffusion, buoyancy
formation of a trap must be ______ migration occures
before
what are the three types of petroleum reservoirs
limestone, sandstone, dolomite
