Glossary
Igneous rocks |
rocks that were formed by the solidification of molten magma. |
Injection well |
a well used to inject gas or water into the reservoir rock in order to maintain reservoir pressure in secondary recovery or (in the case of gas) for conservation purposes. |
Interruptible gas |
gas made available under agreements permitting the termination or interruption of delivery by the suppliers, usually for a limited number of days in a specific period. The opposite is 'firm' gas. |
Interstitial water |
water present in the pores of the oil- or gas-bearing zone of a reservoir rock. Another name for connate water |
IP |
British Institute of Petroleum. |
Isopach map |
a geological map that gives the thickness of a particular stratum. |
