Structural trap

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Most school geology books teach that the oil or gas is trapped under domes of “cap rock”.  This is called a “structural trap”.   The extent of the pool of gas in these structural traps is limited by the boundaries of the structure that traps the gas.

And in many parts of this country, and of the world, that is true.

(And in such cases it is important for the well to be drilled in just the right place.)

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