Study on evaluation of conductivity of variable scale fracturing and filling fractures in offshore oil fields

Affected by reservoir heterogeneity and development measures, fracturing and reconstruction accelerate the water flooding process, which is prone to unbalanced injection and production. By synthesizing subsurface flow theory with discretized reservoir simulation methodologies, the influence of variable scale fracturing and filling on fracture conductivity is simulated. Considering the study of balanced injection-production design method of injection-production linkage relationship, the design of balanced injection-production scheme and parameter optimization evaluation of different completion methods were simulated to realize the study of balanced injection-production influence law based on the difference of reservoir physical properties, so as to evaluate the influence of variable scale fracturing and filling fractures on fracture conductivity under different completion methods. Through simulation analysis, grounded in the analysis results of key factors, a mathematical model was established for the prediction of characteristic parameters of productivity prediction effect, a reasonable numerical range of parameters was given quantitatively, and the law of influencing factors of balanced injection and production was studied. The research results obtained were expected to achieve Precision alignment of waterflooding well patterns with spatially heterogeneous residual oil saturation in offshore reservoirs.