Shale oil-water two-phase flow simulation method and device based on digital core and storage medium

Abstract

The invention discloses a shale oil-water two-phase flow simulation method and device based on a digital core and a storage medium, and belongs to the technical field of oil-gas seepage. The method comprises the following steps: acquiring a three-dimensional shale digital core, wherein the three-dimensional shale digital core is a digital core which is subjected to pore mesh generation and can distinguish an inorganic substance pore boundary and an organic substance pore boundary; establishing a slip length model of the three-dimensional shale digital core; substituting the slip length model into the N-S equation to be solved, obtaining a shale oil-water two-phase flow simulation result based on the three-dimensional shale digital core, setting the slip length model to serve as the boundary condition of the organic matter pore boundary, and setting the slip length model not to serve as the boundary condition of the inorganic matter pore boundary. According to the method, when shale oil single-phase flow simulation is carried out, limitation of pore wall surfaces on the slippage length of shale oil and water phases is added, so that a simulation result can represent the flowing capacity of the shale oil and water phases in a digital rock core.

Description

technical field [0001] The present application relates to the technical field of oil and gas seepage, in particular to a digital core-based shale oil-water two-phase flow simulation method, device and storage medium. Background technique [0002] Shale oil refers to the petroleum resources contained in shale formations dominated by shale. Research on the exploitation of shale oil is one of the hot spots in the petroleum field. Due to the complexity of the fluid flow mechanism in shale cores, it is difficult to obtain the seepage law of fluids in the tight micropores of shale through experiments. Therefore, most of the shale oil flow simulation studies are based on digital cores. The digital core is a digital matrix that accurately marks the skeleton and pores of the real core at a certain resolution, and is the basis for the study of pore-level microscopic seepage theory. [0003] In related technologies, the shale oil-water two-phase flow simulation method based on digita...

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Problems solved by technology

[0003] In related technologies, the shale oil-water two-phase flow simulation method based on digital cores usually uses the pore network model method. However, the current pore network model method does not consider the pore wall surface of the shale oil when simulating the shale oil-water two-phase flow. It is difficult to characterize the flow ability of shale oil-water two-phase in digital core

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