Method for judging remaining oil by utilizing microbial tropism and enhanced oil recovery method

The invention discloses a method for judging remaining oil by utilizing microbial tropism. The method comprises the following steps: (1) screening a test oil reservoir; (2) simulation experiment; (3) determining the relationship between the concentration of the hydrocarbon-philic bacteria and the remaining oil; and (4) determining residual oil of the test oil reservoir. The enhanced oil production method comprises the following steps that the remaining oil of at least one oil-water well of the test oil reservoir is determined through the method, and corresponding oil-water well measures are formulated according to the distribution rule of the remaining oil of the test oil reservoir. The method has the following beneficial effects: (1) the method is accurate, simple, convenient and reliable; (2) targeted improvement measures are formulated according to different remaining oil saturation conditions, so that the method has pertinence and purposiveness, and the field effect is ensured; (3) the method is safe and