2 results about "Percolation process" patented technology

The application discloses a kind of multilayer heterogeneous reservoir percolation simulation analysis methods based on digital core, including obtaining the three-dimensional digital core model of high-permeability reservoir sample, medium-permeability reservoir sample and low-permeability reservoir sample;Get the pore network model after commingling;Based on the pore network model after commingling, simulate oil-water displacement and suction process by percolation theory, calculate the corresponding capillary pressure curve and relative permeability curve, and compare and analyze percolation characteristics.The beneficial effects of the technical scheme proposed in the application include: based on the pore network model after commingling, simulate oil-water displacement and suction process by percolation theory, calculate the corresponding capillary pressure curve and relative permeability curve, and compare and analyze percolation characteristics.Thereby, the multilayer heterogeneous reservoir percolation process can be simulated, and the interlayer interference influence mechanism and residual oil distribution characteristics during multilayer commingling in the reservoir with large differences in low-permeability and heterogeneity can be truly reflected.

This invention relates to a numerical simulation method for water injection-induced dynamic fracture seepage considering the percolation mechanism. The steps are as follows: Step 1: Model establishment; Based on the basic equations of oil-water two-phase flow, considering the dual effects of percolation and displacement on oil-water flow and water injection-induced dynamic fractures, the capillary force model, relative permeability model, and matrix fracture flow rate of the displacement and percolation processes are respectively incorporated into the flow control equations to establish a mathematical model of water injection-induced dynamic fracture oil-water two-phase seepage under the dual effects of percolation and displacement; Step 2: Model solution; The fully implicit finite difference method is used to obtain the dynamic fracture oil-water two-phase seepage field data considering the dual effects of percolation and displacement. This invention can more accurately characterize the actual seepage environment of the reservoir and has higher accuracy in predicting development indicators.