Design characters and applications of a neo-type nuclear magnetic resonance logging tool

A neo-type nuclear magnetic resonance logging tool-MR Scanner was put out by Schlumberger. MR Scanner is eccentrically and gradiently designed. It can provide multiple investigation depth and its measurements are not affected by borehole conditions, and it can also characterize fluid. It has great advantages in reservoir evaluation of low resistivity and low contrast ratio. The structure, characteristics, specification and parameter indices of MR Scanner are explained in detail. Together with its advantages and application effect in reservoir evaluation are explained. (authors)