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Term Definition

The study of the earth and the processes affecting its crust.


The study of rock properties and stratigraphy through the use of analytical methods involving various types of data collection and interpretation.


Gas in place. The volume of natural gas stored in a subsurface accumulation . Differs from recoverable reserves in that some of this gas will not be recovered to the surface due to properties of the rock and/or gas, and in situ pressure.


Gas-oil ratio: the volume of dissolved gas per barrel of oil.

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