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EnglandGeologyQuick questions
Module 5 and 7: Fluids and geological processes; Basin analysis
Quick questions on Hydrocarbons and petroleum systems: source, maturation, migration, reservoir, trap and seal - OCR A-Level Geology
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the formation of coal?Show answer
Coal forms from plant material that accumulated in oxygen-poor swamps and was buried. With increasing burial, heat and pressure, the rank rises and the carbon content increases: peat, then lignite, then bituminous coal, then anthracite. Higher rank means more carbon and a higher energy content.
What is q1?Show answer
Name the five elements of a petroleum system. [2 marks]
What is q2?Show answer
Explain why a reservoir rock must be permeable as well as porous. [2 marks]
What is q3?Show answer
Put the coal ranks in order of increasing carbon content. [2 marks]
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