Abstract: Borehole NMR logging apparatus and methods. A multifrequency method using triple-wait-time is disclosed for determining gas- and light-oil-filled porosity over a broad range of reservoir conditions. The method improves the signal-to-noise ratio and the determination of T1 values for the hydrocarbons, especially when the reservoir contains different fluid types. A set of conditions is derived for the selection of optimum acquisition parameters for logging applications. The data acquisition and processing method enables accurate determination of the pore volumes occupied by each hydrocarbon phase as well as the pore volume occupied by water, as well as accurate T1. A set of conditions is developed to aid in the selection of wait-time combinations appropriate for logging conditions.

Abstract: A blood cell recognition system is provided which includes scanning means for generating signals representative of a pattern in a whole blood smear scanned by the scanning means. Means for examining the signals from the scanning means for generating parameters of the pattern scanned are provided with pattern recognition means responsive to the parameters for identifying the pattern scanned and an operator keyboard for entering data relating to the pattern scanned. An interface is provided between the means for examining and the pattern recognition means which includes first temporary storage means for receiving parameters relating to a cell being scanned, and second temporary storage means for receiving data from said keyboard and buffer storage means for entry of said parameters and said data into said pattern recognition means to enable the pattern recognition means to recognize the pattern in accordance with both the parameters and the data.