1 results about "Intersection graph" patented technology

The application discloses a J function curve classification method and device for an oil reservoir well section, and the method comprises the following steps: obtaining J function values and water saturation values of a plurality of cores measured by experiments; obtaining a J function mathematical model of each core and a pseudo J function curve of each core; determining a J function curve type of each core according to the J function mathematical model of each core and the pseudo J function curve of each core; obtaining porosity values and permeability values of the plurality of cores measured by experiments, and combining the J function curve type of each core to draw a porosity-permeability intersection graph, and determining a demarcation line of J function curves of different types in the porosity-permeability intersection graph; further determining a division area of different J function curve types; drawing data points of porosity and permeability corresponding to a J function curve to be classified in the intersection graph, and determining the classification of the J function curve to be classified according to a division area where the data points are located, so that the J function curve can be accurately classified.