Carbonate fractured-vuggy reservoir displacement physical model, driving device and manufacturing method

Abstract

The invention discloses a carbonate rock fracture-cavity reservoir displacement physical model, the core of the model is formed by laser cutting of a transparent organic glass fracture-cavity model design drawing, and four corners of the model are provided with four injection / production outlets; the model core is clamped by a bottom plate, a cover plate and a sealing silicon rubber sheet from two sides, the bottom plate, the cover plate and the sealing silicon rubber sheet are the same in external size, the bottom plate is a transparent organic glass plate, the cover plate is a transparent organic glass plate with four injection / extraction ports at four corners, and the sealing silicon rubber sheet is a transparent organic glass plate with four injection / extraction ports at four corners. The visual model can be used for fracture-vug type reservoir depletion development and water and gas injection displacement experiment research, an effective research approach and means are provided for the fluid flow rule and remaining oil distribution in the fracture-vug type reservoir development process, and the understanding of the recovery efficiency improving mechanism of the fracture-vug type carbonate reservoir is deepened; the main bottle diameter problems of deep analysis of the remaining oil of the oil reservoir and effective implementation of the technology for improving the recovery ratio are solved.

Description

technical field [0001] The invention relates to the field of experimental equipment for oil and gas field development engineering, in particular to a displacement physical model, a driving device and a manufacturing method of carbonate rock fracture-cavity reservoirs. Background technique [0002] The reservoir structure of fractured-vuggy carbonate reservoirs is complex, and the reservoir bodies and connectivity modes of fractured-vuggy reservoirs are diverse, including pores, fractures, caves and underground rivers of different sizes. The development of fractures and caves in the same geological background has similar laws. The geological background of fracture-vuggy reservoir development can be divided into three types: weathering crust, fault-karst body, and underground river. Correspondingly, three reservoir development models are extracted: weathering crust model, fault-karst body model, and underground river model. Fracture-vuggy reservoirs have extremely strong hete...

AI Technical Summary

Problems solved by technology

Fracture-vuggy reservoirs have extremely strong heterogeneity, which leads to complex oil-gas-water relationship during depletion and water injection and gas injection development. Injected water or gas flows along large fractures and caves, and channeling is very serious. Low degree and uneven distribution, fluid flow law and remaining oil distribution are difficult to monitor. The above problems seriously restrict the development effect of fractured-vuggy reservoirs. Study on rate mechanism

[0003] Existing physical models in displacement experiments of carbonate fracture-cavity reservoirs include models based on 3D printing, simple cavity container connection, cavity filling, and two-dimensional etching design. , large size, pressure resistance, complex structure, etc. for physical models, and cannot meet the requirements of complex fluid flow laws and physical displacement experiments of reservoir units

[0004] Aiming at the current lack of physical models for visual displacement experiments of different development modes of fracture-cavity reservoirs in carbonate rocks, a conceptual model is extracted based on geological models of different development modes of fracture-cavity reservoirs, and a visualization model is designed and produced based on the similarity criterion. Displacement visualization models of different geological development modes for defects that cannot withstand pressure and are prone to leakage, while meeting the requirements of large-scale, complex structures and quantitative research

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