Well logging is the practice of recording and analyzing various kinds of data about the rock formations around a borehole during or after drilling. Also called borehole logging, this activity aims to ...

Well logging chronicles the depths, subsurface formations and events encountered while drilling. Well logs can include visual observations or be made by instruments lowered into the well during ...

Real-time detection and estimation of overpressured formations is now possible using sonic and other logging-while-drilling (LWD) measurements. Data acquired from an overpressured formation in the ...