NASC 130 Essentials3_ch12

By stephen marshak chapter 12 riches in rock energy

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Unformatted text preview: stems A known supply of oil is called an oil reserve known reserve Oil reserves require specific geologic histories Most oil in super-giant fields in the Persian Gulf Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Hydrocarbon Systems Creation of an oil reserve Creation dependant on four features A source rock A migration pathway A reservoir rock A trap Four features must Four develop in a specific order develop Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Hydrocarbon Systems Source rocks and hydrocarbon generation Organic-rich black shale is the source of oil and gas The organic matter is transformed within the oil window The source rock does not store oil or gas Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Hydrocarbon Systems Reservoir rocks and hydrocarbon migration Oil and gas migrate from source rocks to reservoir rocks Oil reservoir Reservoirs are porous, permeable, and store hydrocarbons Rock fractures and ground water facilitate migration Reservoirs can leak to form an oil seep at the surface Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Hydrocarbon Systems Traps and Seals. Trap – a geological configuration that holds oil and gas Trap geological Seal – a low-permeability rock layer abo...
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