Story: Oil and gas

Porous sandstone

Porous sandstone

In this slice of sandstone there are many gaps between the sand grains, making the rock porous. As the gaps are connected, the sandstone is also permeable: any liquid or gas held in the rock can move through it. Rocks that are both porous and permeable are ideal reservoirs for storing oil and gas underground.

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Photograph by Nick Mortimer

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How to cite this page:

Roger Gregg and Carl Walrond, 'Oil and gas - How oil and gas form', Te Ara - the Encyclopedia of New Zealand, (accessed 16 April 2024)

Story by Roger Gregg and Carl Walrond, published 12 Jun 2006