Fluid identification method and apparatus, processor, and machine-readable storage medium

Abstract

A fluid identification method, relating to the field of oil and gas reservoir evaluation, and comprising: determining an escaping fluid porosity correction coefficient of a multi-section full-diameter core: determining apparent total porosity, a two-dimensional nuclear magnetic T1-T2 spectrum, and component fluid porosity of the full-diameter core; determining fluid distribution intervals, bound fluid porosity, vacuum pumping and water saturation-based movable fluid porosity, and total porosity; and determining the escaping fluid porosity correction coefficient on the basis of the total porosity, the apparent total porosity, and bound water porosity of the full-diameter core; establishing a porosity correction model on the basis of the correction coefficient of the multi-section core; determining the total porosity on the basis of the model; and using the apparent total porosity, the total porosity, water saturation, and the component fluid porosity to determine oil and gas saturation of a full-well-section core. The method allows for accurate measurement of the porosity of a gas reservoir core, accurate identification of fluid properties, and quantitative evaluation. The present invention also relates to a fluid identification apparatus, a processor, and a machine-readable storage medium.

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