Study on Major Influencing Factors to Water Cut of Horizontal Well in Bottom Water Drive Reservoir

Water cut rising of horizontal wells in bottom water drive reservoir have been influenced on by many kinds of factors, while it is difficult to determine the main influencing factors. It is disadvantageous to implement water shutoff and profile control, once water break through occurs. On the basis of reservoir performance and static data, using technique of fuzzy math, evaluation parameters and evaluation criterions on water cut rising are confirmed, and weight in influencing factors are determined. Fluids producing intensity, anisotropy, inter beds are considered the main influencing factors, which provide the guidance to tapping potential measures in horizontal wells in later period.