The Technology Study and Application of Fine Numerical Simulation under Microfacies Constraints

Reservoir numerical simulation plays a very important role in adjusting and optimizing of production measures, remaining oil study and enhancing oil recovery. The paper constructs reservoir geologic model under sedimentary facies constraints in the view of characteristics on having entered high water cut stage, water flooding areas were further enlarged, oil layers were highly flooded in Bei-san oilfield of Da Qing, then we use different relative permeability ratio curve based on sedimentary microfacies and carry out fine numerical simulation, combined with liquid producing, water absorbing profile and real-time monitoring measures. The results show that reservoir numerical simulation under sedimentary facies constraints can precisely match history production and quantify remaining oil distribution of different sedimentary microfacies in different production stages. Matching values of fine Numerical Simulation are more close to the actual ones, compared with normal Numerical Simulation.