images is to locate and identify fractures as induced or natural horizontal or vertical an eighth parameter regarding diagnosing drilling fluid lost circulation and root cause analysis is lithology here u201c lithology u201d means identification of rock material this parameter is related to diagnosing drilling fluid lost circulation and root cause analysis because different materials have different properties such as permeability strength stiffness and deformation for example high natural permeability is normal for gravels and coarse sandstone while shale has a higher fracture strength than sandstones lithology can be obtained from gamma ray logs which are used to characterize the type of rock or sediment in a borehole different types of rock emit different amount of gamma radiation in a predictable manner for example shales usually emit more gamma radiation than other sedimentary rock a ninth parameter regarding diagnosing drilling fluid lost circulation and root cause analysis is tectonic regime here u201c tectonic regime u201d generally refers to whether the geological environment has a normal stress regime a strike slip stress regime or a thrust reverse stress regime these environments are determined by the relation between the horizontal stresses and the vertical stresses fig5 depicts three types of tectonic regimes.