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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- IIT JAM
- Geology (GG)
What is limestone permeability and porosity ? and limestone is a good reservoir rock?
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Suyash
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Limestone is not good reservoir rock it's porous as well as permeable which led to leakage of water
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The porosity and the permeability of limestone is important because these properties control how water moves over and through the rock. There are several possible routes that water might take: 1) between the grains themselves via pores in the rock 2) through cracks, joints or fissures 3) through caves. Porosity-The porosity of a rock is the proportion of the rock that is made of the spaces between the grains (known as pores), voids and cracks. Some limestones, for example chalk, are very porous, but others, like the massive Carboniferous limestones, are not at all porous — although they are permeable. The permeability of a rock is its ability to allow fluids (e.g. water) to pass through it from one pore space to another by capillary action or along cracks and fissures. Water can pass freely through permeable rocks but have difficulty passing through impermeable (or impervious) rocks. Permeability is measured by the rate of flow of a fluid Permeability is associated with porosity of a rock because the ease with which a liquid moves through a rock by capillary action depends on the size of the pores and how well they are interconnected.
so we can call limetone have secondary porosity and permeability?
So...in simple language...permeability is ability of water to flow from one side of rock to other through cracks,fissures etc.and porosity is ability to hold water between pores and grain spaces