Lect6 -- Oil

Right temperature and wait a long time a few millions

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Unformatted text preview: stored The simple recipe for making petroleum •  Grow some marine critters; let them die and sink to the seafloor •  Make sure they are buried in an anoxic environment so they are not consumed by other hungry seafloor critters •  Heat organic sedimentary rock by burial… but make sure you heat it to just the right temperature! And wait a long time. A few millions of years at least. •  Allow oil to migrate from source rock to reservoir rock… Why does oil not all escape? Traps! Different kinds of traps Oil and gas are o]en associated! The simple recipe for making petroleum •  Grow some marine critters; let them die and sink to the seafloor •  Make sure they are buried in an anoxic environment so they are not consumed by other hungry seafloor critters •  Heat organic sedimentary rock by burial… but make sure you heat it to just the right temperature! And wait a long time. A few millions of years at least. •  Allow oil to migrate from source rock to reservoir rock… •  …and make sure that the reservoir rock as a good trap to prevent oil escape. A good impermeable caprock should do the trick. •  Drill Away! Oil forma>on takes a long >me! Cenozoic rocks of California The Monterey Forma>on The Monterey Forma>on Oil sands of the Monterey Forma>on Monterey Fossil Dolphin Diatoms and diatomite Oil from diatomite Oil and gas fields of California The LA Basin Oil in LA Edward Doheny Doheny in 1892 at the first oil field in LA The Doheny Mansion The Doheny Library… La Brea Tar Pits USC Hancock Building California Oil Produc>on World Oil Produc>on World Oil Reserves World Oil Consump>on US petroleum use by category We rely on oil in all kinds of ways…...
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