Chapter 1 Review

Chapter 1 Review - Chapter 1 Petroleum Geology Review...

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Unformatted text preview: Chapter 1: Petroleum Geology Review Petroleum reservoir–rock formation that holds oil and gas • Photosynthesizing microorganisms in the oceans represent earth's largest biomass, which is preserved and converted into gas land plants with woody materials become coal Organic theory–dead organisms sank to bottom of water, trapped in oxygen-less mud ○ Inorganic theory–oil either left over from formation of solar system or later from deep within earth ○ 150 deg F: oil 225-350 deg F: methane gas 500 deg F: organic matter destroyed as petroleum source Hydrocarbons: ○ Origin of Petroleum • Reservoir rock must be at least 10% porous to be commercially valuable ○ Permeability–how well pores are connected (in millidarcys) ○ Easy to extract: sandstones and carbonates, most porous and permeable ○ Difficult: shale (porous but ~0% permeability) and tar sands (sticky oil) ○ Porosity and Permeability • Organic theory–it didn't form in large amounts, but rather deep pressure forced it upward & it joined with...
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This note was uploaded on 08/31/2011 for the course PGE 301 taught by Professor Olson during the Spring '11 term at University of Texas.

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