ERTH 2403 Lecture 12: Marine Resources + Environmental Concerns + Law of the Sea
26 Oct 2018
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Document Summary
Oil, gas, pearls: waste disposal, vulnerable-hidden, technologically forbidding, marine resources, petroleum, hydrocarbons: oil, natural gas. Large deposits are found offshore in sediments under ocean water: global consumption is huge, floating platforms = artificial islands (ex. Gulf of mexico: very costly, built to get oil from ocean sediments, drill > 1000m in depth in substrate (continental shelf, continental slope, formation, 1. Source rock: organic shale (contain organic matter from decomposed algae and other dead marine organisms: plankton and mainly zooplankton) buried in anoxic shallow sediments (continental margins: 2. Reservoir rock: sand or limestone (should be porous allowing the oil to move and rise up: 3. At certain temperature and pressure, we have an oil window and gas window where oil and gas form: 4. Once formed, the liquid and gas move upward through porous rocks (reservoir rocks: sandstones or limestones with cavities) until they hit an impermeable layer, clay: sealed rock): 5.
