Tight Gas: A New Type of Energy Reserve

Natural gas is found is such pores of rocks which are linked to each other and reach on earth by the wells of gas present in the rocks. Some reserves of gas are present in the pores of rocks but the passages among them are so narrow that make the passing of gas to the wells almost impossible. Such reserves are called “Tight Gas” However, in the last few years the technology has find out ways that made getting this type of gas possible too.

The Petroleum reservoirs have two important characteristics on the basis of which the reserve of gas or petroleum is found in that rock. Firstly the reservoir rock should contain pores in which gas can be stored. This characteristic is called Porosity. Secondly these pores should be interlinked so that when the gas entered the well from the pours it could reach the earth easily. This characteristic is called Permeability.

The measurement of Permeability is Millidarcy and 5 to 10 millidarcy is considered a good permeability that can easily pull the gas out of the well. This is the description of known or customary reservoirs. Now we will talk on the new types of rocks in which the permeability is less to 1 millicarcy. This is a tight gas. Since gas is obstructed among the particles of sand therefore such reservoir is called “Tight Gas Sand”.

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