Three-dimensional large scale physical model of fracture-cave type carbonate reservoir and preparation method of three-dimensional large scale physical model

Abstract

The invention relates to a three-dimensional large scale physical model of a fracture-cave type carbonate reservoir and a preparation method of the three-dimensional large scale physical model. The model is composed of a simulated karst cave, a simulated fracture and a constant temperature oven. The preparation method specifically includes the steps that a carbonate rock outcrop which is tested and analyzed is sealed through a reaction still to simulate the karst cave, and a fracture is simulated through pipeline filling to press carbonate grains; valves and joints are used for connecting the sealed simulated karst caves and the simulated fractures which are in different number and different space positions, so that a simulated carbonate fracture-cave network structure is formed and mounted in the constant temperature oven, and the three-dimensional large scale physical model of fracture-cave type carbonate rocks is formed. According to the three-dimensional large scale physical model of the fracture-cave type carbonate reservoir and the preparation method of the three-dimensional large scale physical model, not only a complex space network structure between actual reservoir stratums of fracture-cave type carbonate oil and gas reservoirs can be simulated, but also the physical and chemical properties of solid phase reservoir rocks can be reflected, high temperature and high pressure conditions of the actual reservoir stratums can be simulated, and production effects when wells are drilled at different positions can be simulated.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development, and in particular relates to a three-dimensional large-scale physical model of a fracture-vuggy carbonate reservoir and a preparation method thereof. Background technique [0002] Fracture-vuggy carbonate reservoirs are formed through multi-stage tectonic movements and paleokarst, and their reservoir development is affected by various processes such as sedimentation, diagenesis, structure, paleogeomorphology, and paleokarst. Fracture-vuggy carbonate reservoirs are based on fractured reservoirs, containing CO 2 The fracture-cavity reservoir is formed after the surface water and acidic groundwater dissolve along the fractures to produce many caves. There are generally both fractures and dissolved pores in the reservoir, among which the dissolved caves and pores are the main storage space, the fractures are the main seepage channels, and the matrix is ​​usually considered to b...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the defects and insufficiencies of the existing physical models of fractured-vuggy carbonate reservoirs, the present invention provides a complex spatial network structure between fractures and caves in actual reservoirs of fractured-vuggy carbonate reservoirs. , can reflect the physical and chemical properties of solid reservoir rocks, and can also simulate the high temperature and high pressure conditions of the actual reservoir and the production effect when the well is drilled in different positions. and its preparation method

Images