Complex biological reef bottom water gas reservoir water breakthrough time prediction method

The invention discloses a complex biological reef bottom water and gas reservoir water breakthrough time prediction method, which comprises the steps of establishing a complex biological reef bottom water and gas reservoir numerical model by utilizing a numerical simulation technology; analyzing the influence degree of each influence factor on the bottom water coning time, the water coning breakthrough time and the waterless gas production rate, and preliminarily determining main factors influencing the water breakthrough time of the gas well; according to the main factors influencing the water breakthrough time of the gas well, building a unitary regression model of the gas well waterless gas production amount; utilizing a multivariate nonlinear regression analysis method to obtain a maincontrol factor, determining a weight coefficient of the main control factor, and establishing a multi-factor controlled anhydrous gas production prediction mathematical model; establishing a biological reef bottom water and