HB97 bigger crystal nature gamma logging tool is designed for overcoming logging curve repeating errors due to statistical variation.

Natural gamma logging is a kind of most basic methods of well logging in cased Wells which measure with gamma ray detector along well during logging.

This article introduces the new logging method which uses Gadolinium-injecting instead of Boron-injecting and uses Neutron-Gamma Logging instead of Neutron Lifetime Logging.