Sunflower Oil Or Olive Oil In The Ear

cubic packing Pressure Anisotropy

A condition on the surface which the pore pressure of a geologic formation exceeds or is below the expected formation pressure. When impermeable rocks such as shales are compacted rapidly, pore fluids can not always escape and must then be compatible with the total column that covers the rock, resulting in the formation of abnormally high pressures. Too much pressure, called overpressure or geopressure, can cause a blowout or become uncontrollable during drilling. Too little pressure can cause the drill pipe to "stick" to the formation of low pressure

From: http://www.glossary.oilfield.slb. com / Display.cfm? Term = abnormal% 20pressure