Multidirectional multilayer full-diameter fracture core seepage simulation device and application thereof

Abstract

The invention discloses a multidirectional multilayer full-diameter fracture core seepage simulation device and application thereof. The seepage simulation device comprises a full-diameter crack core clamping module, a radial multidirectional multilayer seepage injection and production module and an axial seepage injection and production module. According to the simulation device, rock core seepage can be simulated from multiple directions and multiple angles such as the axial direction, the radial direction and the complex multiple directions, the simulated fluid seepage behavior is closer to the actual condition of an oil reservoir, and secondary damage and operation inconvenience caused by drilling a rock sample from a full-diameter rock core are avoided. The device has high reference value for researching the seepage law of the complex hydraulic fracture of the compact oil and gas reservoir. According to the simulation device, comprehensive radial seepage simulation can be conducted on a full-diameter fracture core, pertinent seepage simulation can also be conducted on a single area, contributions of hydraulic fractures of different forms in different areas to the overall flow conductivity can be determined, and then the compact oil and gas reservoir fracturing transformation effect can be evaluated more accurately.

Description

technical field [0001] The invention relates to a multi-directional multi-layer full-diameter fracture core seepage simulation device and an application thereof, belonging to the technical field of fracturing reconstruction of unconventional oil and gas reservoirs such as shale oil gas, coal bed methane, and tight sandy conglomerate oil and gas. Background technique [0002] The global demand for energy is growing day by day, and the scale of exploration and development of oil and gas resources continues to expand. Unconventional oil and gas resources are rich in reserves and widely distributed, and have gradually become the focus of current oil and gas field exploration and development. However, tight unconventional oil and gas reservoirs represented by shale oil and gas, coalbed methane, and tight sandy conglomerate oil and gas generally have shortcomings such as lack of natural fractures and poor reservoir permeability, which increases the difficulty of mining and limits ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a seepage simulation device for the full-diameter hydraulic fracture core of tight oil and gas reservoirs, which can carry out pressure loading and seepage simulation from both radial and axial directions, and can better restore the real seepage status of the formation; the simulation The device overcomes the shortcomings of the existing devices that do not consider the multi-directional and multi-layered radial seepage conditions, solves the problem that the existing devices cannot simulate complex seepage conditions in the formation, and realizes the overall and regional seepage simulation of multi-angle and multi-level layers on the full-diameter core , which is beneficial to accurately evaluate the fracturing effect of tight oil and gas reservoirs

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