Fracture-cave carbonate reservoir physical model and displacement simulation experimental device and system

Abstract

The invention relates to a fracture-cave carbonate reservoir physical model and a displacement simulation experimental device and system. The fracture-cave carbonate reservoir physical model comprises caves, fractures, a base plate and a filler, wherein the caves and the fractures are arranged on the base plate and connected into a whole; the filler is used for simulating the cave filling conditions; and the fracture-cave carbonate reservoir physical model is provided with a filler opening, a withdrawal opening and a bottom water opening. The fracture-cave reservoir visual displacement experimental device is more approximate to an actual reservoir model, particularly for cave and fracture-cave reservoirs, can simulate the discrete distribution feature of the fractures and caves, and is more practical for simulation of filled caves. In addition, owing to the detachability of the fracture-cave model, the operability and the flexibility of experiments are enhanced; the model setting, adjusting and maintaining periods are shortened; the model is simple in manufacture process and can be repeatedly used; and therefore, the experiment cost is greatly lowered.

Description

technical field [0001] The invention relates to the technical field of oil recovery engineering, in particular to a physical model of a fractured-cavity carbonate rock reservoir, a displacement simulation experiment device and a system. Background technique [0002] Fracture-cavity carbonate reservoirs are reformed reservoirs. Due to the influence of lithology, structure and dissolution, the type of storage space is obviously different from that of clastic rock reservoirs. Vugs, holes, and fractures are the main storage spaces and flow channels, and the fractured-vuggy reservoirs have the characteristics of random distribution in space, complex configuration relationships, and various shapes and scales. Karst caves refer to holes with a diameter larger than 50mm. Dissolved holes mainly refer to holes with a diameter between 2mm and 50mm. The cracks are mainly structural and dissolution cracks, and the opening of cracks is mostly less than 1mm. According to different combina...

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Problems solved by technology

[0006] The existing physical models of fracture-cavity reservoirs mainly include glass tube model, etched flat plate model, pouring irregular model, core fracture-cavity model, etc. Most of them try to make the complete fracture-cavity combination system into a relatively small space, resulting in The geometric similarity criterion cannot be met, and the complex configuration relationship is ignored, which eventually leads to serious distortion of the simulation process, and the simulation results lack guidance

The caves in the reservoir have various shapes, complex filling characteristics, large differences in fracture conductivity, and complex connection relationships. The existing models are difficult to control during the production process, and the flexibility of the experimental process is poor.

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