Displacement Physical Model, Driving Device and Manufacturing Method of Carbonate Fracture-vuggy Reservoir

Abstract

The invention discloses a displacement physical model of a carbonate rock fracture-cavity reservoir. The core of the model is laser-cut from the design drawing of a transparent plexiglass fracture-cavity model, and four injection / production ports are arranged at its four corners; the core of the model is composed of a bottom plate, The cover plate and the sealing silicone rubber sheet are clamped from both sides. The external dimensions of the bottom plate, cover plate, and sealing silicone rubber sheet are the same. The bottom plate is a transparent plexiglass plate, and the cover plate has four injection / production ports at four corners The transparent plexiglass plate, the visualization model of the present invention can be used in the depletion development of fracture-cavity reservoirs and the experimental research of water injection and gas injection displacement, and provides effective research methods and means for the fluid flow law and remaining oil distribution in the development process of fracture-cavity reservoirs , to deepen the understanding of the enhanced oil recovery mechanism of fractured-cavity carbonate reservoirs, and to solve the main bottle diameter problems for in-depth analysis of remaining oil in such reservoirs and effective implementation of enhanced oil recovery technologies.

Description

technical field [0001] The invention relates to the field of oil and gas field development engineering experimental equipment, in particular to a physical model, a driving device and a manufacturing method of carbonate rock fracture-cavity oil reservoir displacement. Background technique [0002] Carbonate fracture-cavity reservoirs have complex reservoir structures, and there are various types of reservoir bodies and connectivity patterns in fracture-cavity reservoirs, including pores, fractures, caves and underground rivers of different sizes. Fractures and caves with the same geological background have similar development patterns. The geological background of fracture-cavity development in fracture-cavity reservoirs can be divided into three types: weathering crust, fault-karst body, and underground river. Correspondingly, three reservoir development models are proposed: weathering crust model, fault-karst body model, and dark river model. Fractured-cavity reservoirs ha...

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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