terms:net_overburden
That part of the overburden (geostatic load) which is supported by grain to-grain contact of the rock. Net overburden usually is less than (total) overburden because of two reasons:
(1) Pore pressure within the bed of interest supports the weight of the column of formation fluid above it. If the pore pressure is higher than normal, then it supports part of the lithostatic load.
(2) The stress on the rock concentrated at the grain-to-grain contact may be less than that caused by the weight of overlying dry rock, because of the buoyant effect on the porous rock column produced by the liquid in the pore volumes.
terms/net_overburden.txt · Last modified: 2023/11/22 08:41 by 127.0.0.1