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===Pe log=== ...locate natural [[fracture]]s. If the barite penetrates the fractures, the Pe curve shows considerable increases.

| Photoelectrical effect (Pe) || [[length::2 in]] || [[length::2 in]] || Identify lithology and well-to- ...png|{{figure number|2}}A typical log showing density, compensated neutron, Pe, gamma ray, and caliper measurements. &copy; Schlumberger.<ref name=Schlumb

==Photoelectric absorption (Pe) logs property measured== Photoelectric absorption (Pe), measured by the newer formation density tools, is related to atomic numbe

...ection of the volumetric photoelectric absorption index, U (the product of Pe and electronic density), to the value at zero porosity. RHOMAA results from ...in [[:file:difficult-lithologies_fig2.png|Figure 2]]. Start by marking the Pe value on the photoelectric portion of the horizontal axis (left side), then

! Lithology || Density, g/cc || Average pe