Method for calibrating recoverable reserves of pressure-driven water injection well group

The invention relates to the technical field of oil and gas field development, in particular to a method for calibrating recoverable reserves of a pressure flooding water injection well group. The method comprises the following steps that the added recoverable reserves of all the pressure drive well groups are calibrated; calculating the remaining recoverable reserves of the producing well; calculating the increased recoverable reserves of the oil production well after de-weighting; calculating the water distribution amount according to the accumulated oil increase amount proportion of each oil well in the well group to obtain the water injection amount of the oil well distributed in different well groups, and splitting the added recoverable reserves of the oil well into each well group according to the proportion of the water distribution amount of the oil well in different well groups to the total water distribution amount of the well; and the worked-out exploitable reserves of the oil producing wells in th