Experimental device and method for simulating gas migration mechanism

Abstract

The invention discloses an experimental device and method for simulating a gas migration mechanism, which relate to the technical field of gas migration simulation experimental devices. The experimental device comprises a transparent box body and a plurality of permeable plates, and the permeable plates divide the transparent box body into a single wetting pore medium cavity and a plurality of mixed wetting pore medium cavities from top to bottom; the single wetting pore medium cavity is used for placing strong hydrophilic glass beads, and the mixed wetting pore medium cavity is used for placing mixed strong hydrophilic glass beads and strong oleophylic glass beads; the number of the glass beads placed each time can be reduced by placing the glass beads for multiple times, the mixing uniformity of the strong hydrophilic glass beads and the strong oleophylic glass beads in each chamber is improved, the overall mixing uniformity of the mixed wetting pore medium layer is further improved, the influence of non-uniform mixing of the strong hydrophilic glass beads and the strong oleophylic glass beads on an experimental result is reduced, glass beads with different diameters can be arranged in different mixed wetting pore medium cavities to simulate different medium layers in the stratum, and the influence of the heterogeneous mixed wetting pore medium on gas migration is researched.

Description

technical field [0001] The invention relates to the technical field of gas migration simulation experimental devices, in particular to an experimental device and method for simulating gas migration mechanism. Background technique [0002] Wettability is one of the basic properties of reservoirs, which controls the microscopic seepage behavior and distribution of different fluids (Anderson, 1986; Morrow, 1990; Buckley, 1996), especially for oil and gas migration and The controlling effect of aggregation is more obvious (Zeng et al., 2014; Luo et al., 2016). Wettability is the tendency of a solid surface to adhere to one of the immiscible two-phase fluids. According to the adsorption tendency of the oil-water two-phase on the rock surface, it can be divided into strong water wetting, neutral wetting and strong oil wetting. 3 types. Because clastic rocks are deposited in water bodies, the surface of the skeleton particles often adsorbs a layer of water molecules to show the o...

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Problems solved by technology

During the experiment, in order to fully simulate the actual situation of the geological dredging layer, it is very important to mix the hydrophilic medium and the oil-wet medium evenly. However, it is difficult to ensure that the hydrophilic-oil-wet mixed medium is added at one time in the traditional experimental device and experimental method. Evenly mixed, the error of the experimental results is relatively large; and the traditional experimental devices and experimental methods only focus on the influence of a single porous medium on gas migration, and it is difficult to fully simulate the formation environment of multi-layer porous media

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