Method and device for predicting cold production remaining oil potential of ultra-heavy oil encryption horizontal well

The invention provides a method and device for predicting the cold production remaining oil potential of an ultra-heavy oil encryption horizontal well. The method comprises the steps that S1, a typical numerical simulation model of the geological characteristics of an ultra-heavy oil reservoir in a target block is established; s2, according to the model, determining a change range of oil reservoir physical properties of the ultra-heavy oil reservoir in a target block and change ranges of pressure and oil saturation in a development period, determining geological parameters and change ranges thereof accordingly, and meanwhile, performing sensitivity analysis to determine quantitative characterization parameters of remaining oil cold production potential; s3, through model simulation, obtaining well spacing modes of different infilled horizontal wells and cold recovery recoverable reserves of remaining oil of the infilled horizontal wells under the condition of different quantitative characterization parameters