 The Burukabugu Hydrogen field in Mali provides a unique opportunity for geologists to study the characteristics of natural hydrogen reservoirs. The field consists of two types of reservoirs, carbonate rocks containing dolomite and sandstone rocks. The carbonate rocks contain higher levels of hydrogen than the sandstone rocks, and the neutron tool was used to identify the presence of hydrogen in both reservoirs. The carbonate rocks are highly porous and contain secondary porosity created by castification, while the sandstone rocks are less porous and contain primary porosity. The presence of hydrogen in these reservoirs indicates that they are dynamic systems that are constantly being replenished with hydrogen-rich gas. This article was authored by Omar Mega, Eric Deville, Jerome Laval, and others.