Vectorized production and injection allocation method for offshore oil field

The invention provides a vectorized production and injection allocation method for an offshore oil field. The vectorized production and injection allocation method for the offshore oil field includes the steps that 1, split flow among oil-water wells is calculated, and the displacement breakthrough coefficient is determined; 2, through analysis of remaining oil among the oil-water wells, the displacement breakthrough coefficient threshold value for judging whether displacement is balanced or not is obtained; 3, according to the displacement breakthrough coefficient threshold value, the actual displacement condition is divided into multiple modes; 4, aiming at each mode, the vectorized production and injection allocation method is established, and maximized displacement balance of an oil reservoir under the offshore multi-well interference condition is achieved. According to the vectorized production and injection allocation method for the offshore oil field, the purpose is to achieve maximized displacement ba