Oilfield Glossary
Oilfield Glossary
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interstitial gas

1. n. [Reservoir Characterization, Shale Gas]
The gas stored in the pore space of a reservoir rock. Measurement of interstitial gas and adsorbed gas, which is the gas accumulated on the surface of another solid material, such as a grain of reservoir rock, allows calculation of gas in place in a reservoir.
Synonyms: pore gas