The thermal Neutron Decay Time log permits the evaluation of formations through casing. The Scale Factor method automatically maximizes the statistical precision of measurement of formation decay times. Diffusion effects are recognized as a perturbation. Departure curves for casing fluid, casing size, and formation porosity are presented.
CITATION STYLE
WAHL JS, NELLIGAN WB, FRENTROP AH, JOHNSTONE CW, & SCHWARTZ RJ. (1970). Thermal neutron decay time log. Soc Petrol Eng J, 10(4), 365–379.
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