Lecture 10 Notes

Lecture 10 Notes - Lecture10Notes 22:14...

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Lecture 10 Notes 22:14 Lecture 10 Quiz Questions: 1. Natural Gas (also called Energy Gas) main component is: Methane 2. Gas reservoirs occur is ____ sedimentary basins. Some 3. Geological structures that allow natural gas to accumulate underground are called: Traps 4. The country that has more cars/vehicles that use natural gas as fuel is: Pakistan 5. At the current consumption rate, the world has a ____ year supply of natural gas: 60 Natural gas : combustible gases found in the earths crust (energy gases) found with  noncombustible gases (such as nitrogen and carbon dioxide) constitute natural gas. - Occurrence of energy gases within the earth’s crust: First Stage     : o Involves the accumulation of organic matter in sedimentary rocks o Throughout geologic time, the world oceans have expanded and receded creating the  conditions for organic matter from decaying higher plants and microorganisms to  accumulate in the in the underlying sediments o Eventually organic-rich layers form Second Stage     : o Starts with down warping of portions of the Earth’s crust to form basins (depressions) o The organic-rich sediment layers subside and are buried by overlying organic-free  sediments o Microorganisms are buried with the organic-rich sediment o They use the organic matter as a food and generate methane
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o Sediments are gradually hardened into rocks o Methane might escape if there are no impermeable sediments on top (seals)
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This note was uploaded on 10/04/2011 for the course GEOS 1024 taught by Professor Meschreiber during the Spring '08 term at Virginia Tech.

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Lecture 10 Notes - Lecture10Notes 22:14...

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