(Q005) Which of the following is a typical oil trap?Group of answer choicesan anticlinea synclinethe neck of an ancient volcanoan igneous dike
Question
(Q005) Which of the following is a typical oil trap?Group of answer choicesan anticlinea synclinethe neck of an ancient volcanoan igneous dike
Solution
The correct answer is "an anticline".
Here's why:
An oil trap is a geological structure that allows for significant amounts of oil and gas to accumulate. The key to this accumulation is a type of rock or structure that prevents the oil and gas from further migration.
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An anticline is a type of fold that is an arch-like shape and has its oldest beds at its core. The convex up structure can act as a trap for oil.
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A syncline, on the other hand, is a fold with younger layers closer to the center of the structure. Oil would not be trapped here as it tends to migrate upwards.
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The neck of an ancient volcano would not typically serve as an oil trap. The intense heat and pressure associated with volcanic activity often make these areas unsuitable for oil and gas accumulation.
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An igneous dike is a thin, sheet-like intrusion into a fissure or crack. They cut across sedimentary rock layers, oil would not be trapped here as it is not a porous and permeable reservoir rock.
So, among the given options, an anticline is a typical oil trap.
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