What kind of rock is full of tiny connected air spaces

Permeable is full of tiny connected air spaces

This type of rock is called preamble

“other instruments such as gravimeters and magnetometers are also used in the search for petroleum. extracting crude oil normally starts with drilling wells into an underground reservoir. when an oil well has been tapped, a geologist (known on the rig as the "mudlogger") will note its presence. “ this is what i found on google i hope it