A multi-directional multi-layer full-diameter fracture core seepage simulation device and its application

Abstract

The invention discloses a multi-directional multi-layer full-diameter fracture core seepage simulation device and its application. The seepage simulation device includes a full-diameter fracture core clamping module, a radial multi-directional multi-layer seepage injection-production module and an axial seepage injection-production module. The simulation device of the present invention can simulate core seepage from multiple directions and angles such as axial, radial, complex and multi-directional, etc., and the simulated fluid seepage behavior is closer to the actual reservoir, and avoids the need to drill rock cores from full-diameter cores. The secondary damage caused by the sample and the inconvenience of operation have a high reference value for the study of the seepage law of complex hydraulic fractures in tight oil and gas reservoirs. The simulation device of the present invention can not only carry out comprehensive radial seepage simulation on the full-diameter fractured core, but also carry out targeted seepage simulation on a single area, which helps to clarify the contribution of hydraulic fractures of different shapes in different areas to the overall flow conductivity, and furthermore Accurately evaluate the fracturing effect of tight oil and gas reservoirs.

Description

technical field [0001] The invention relates to a multi-directional multi-layer full-diameter fractured core seepage simulation device and its application, and belongs to the technical field of fracturing and reforming of unconventional oil and gas reservoirs such as shale oil and gas, coalbed methane, and tight glutenite oil and gas. Background technique [0002] The global energy demand is increasing day by day, and the scale of exploration and development of oil and gas resources is expanding. Unconventional oil and gas resources are abundant 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 glutenite oil and gas generally have shortcomings such as lack of natural fractures and poor reservoir permeability, which increase the difficulty of exploitation and limit the efficient and rapid developm...

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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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