secondary porosity

geology

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July 13, 2026

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In geology, secondary porosity refers to void spaces in rocks that are created after the rock has formed. This is in contrast to primary porosity, which is inherent to the rock's original deposition and consolidation.1

Secondary porosity can develop through several geological processes, including:
* Solution: Dissolution of minerals within the rock by fluids.1
* Recrystallization: Changes in the crystal structure of minerals.1
* Fracturing: The formation of cracks and fissures within the rock.1
* Weathering: Breakdown of rock material due to exposure to the Earth's surface.1

These processes can either increase or decrease the rock's overall porosity and permeability, which are crucial factors for the storage and movement of subsurface fluids like petroleum and groundwater.21

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petroleum
Accumulation in reservoir beds
…those in which they are secondary, or induced. Primary porosity and permeability are dependent on the size, shape, and grading and packing of the sediment grains and also on the manner of their initial consolidation. Secondary porosity and permeability result from postdepositional factors, such as solution, recrystallization, fracturing, weathering during…
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…those in which they are secondary, or induced. Primary porosity and permeability are dependent on the size, shape, and grading and packing of the sediment grains and also on the manner of their initial consolidation. Secondary porosity and permeability result from postdepositional factors, such as solution, recrystallization, fracturing, weathering during…
Read More