BIOL 1001 Chapter : Ch 9 Spring 2014
Document Summary
**the only place you can find oil is in a sedimentary basin: hydrocarbon systems. Hydrocarbons: chains/rings or c & h, considered fossil fuels. Fossil fuels are considered oil and natural gas: longer chain=more viscuous (tar is the longest chain) One source rock: organisms: die and accumulate in slow moving water (lake, ocean, clay and oxygen-poor water, settles out and compacts, turns into organic shale. Heat rocks: (90-160 c) chemical reactions, oil and gas, (160-250 c) just gas, too hot to make oil, any higher, carbon. Migration (oil/gas moves up: once it"s a liquid it rises just like magma, more buoyant, need reservoir rock- porous (open spaces between grains) and permeable (connectivity of poor spaces, has to be good permeability) rock, always sedimentary. Start by looking for large sedimentary basins (saudi arabian area, canada, Seismic reflection profile: done by physically creating seismic waves that reflect off the layers of sedimentary rocks, bends in graph denotes liquid.
