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 ...

Forest Oil Corp., Denver, successfully completed openhole logging operations with drill pipe-conveyed memory logging tools to a depth of 20,203 ft MD in its Redoubt No. 4 delineation well in Alaska's ...

Guidance and recommendations for radiation protection and safety in well logging – the study of geological formations penetrated via a borehole – and accelerator-based radioisotope production are ...