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EnglandGeologyQuick questions
Geohazards and economic geology
Quick questions on Hydrocarbons and petroleum systems: source, reservoir, seal, trap and migration - Eduqas 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 elements must coincide?Show answer
An accumulation forms only if all six elements are present and correctly timed: a source rock, sufficient maturation, a migration path, a reservoir, a seal, and a trap that existed before the hydrocarbons migrated. Miss any one (no seal, or the trap formed too late) and there is no field.
What is q1?Show answer
State the six elements that must be present for a petroleum accumulation. [3 marks]
What is q2?Show answer
Explain the difference between porosity and permeability. [2 marks]
What is q3?Show answer
State the order in which gas, oil and water are arranged in a trap, and why. [2 marks]
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