Visual experimental device for simulating proppant migration in complex fracture network

Abstract

The invention discloses a visualized experimental device for simulating the migration of proppant in a complex fracture network, including a liquid supply and sand mixing system, a pump injection system, a pipeline delivery system, a visualized fracture network system, a circulating fluid processing system, and a data acquisition system and control system, the outlet of the liquid supply and sand mixing system is connected to the inlet of the pumping system through the pipeline delivery system, the outlet of the pumping system is connected to the inlet of the visualized fracture network system through the pipeline delivery system, and the outlet of the visualized fracture network system is connected through The pipeline delivery system is connected to the inlet of the circulating fluid treatment system, the outlet of the circulating fluid treatment system is connected to the inlet of the pump injection system through the pipeline delivery system, and the data acquisition system for collecting data is connected to the control system. The invention can more realistically simulate the migration rule of the proppant in the complicated fracture network, and explore the flow mechanism of the proppant in slick water fracturing.

Description

technical field [0001] The invention relates to a simulation device, in particular to a visualization experiment device for simulating the migration of proppant in a complex fracture network during hydraulic fracturing. Background technique [0002] Shale reservoirs have low porosity, low permeability, bedding, and natural micro-fractures, so it is difficult to achieve efficient development by conventional mining methods. Multi-stage fracturing technology for horizontal wells can form complex fracture networks, increase the volume of reservoir stimulation, and greatly improve gas well production and gas reservoir recovery. Especially the slick water fracturing technology for shale reservoirs can And other characteristics, can more effectively improve the complexity of the hydraulic fracture network and increase the reservoir stimulated volume (SRV). However, the complex fracture network and the low sand-carrying capacity of slick water have a huge impact on the effective su...

AI Technical Summary

Problems solved by technology

[0004] (1) The influence of natural fractures on proppant migration in fractures cannot be simulated;

[0005] (2) The influence of reservoir bedding fractures on proppant migration in fractures cannot be simulated;

[0006] (3) The migration law of proppant in the fracture cannot be simulated during cluster perforation fracturing;

[0007] (4) In the "factory" fracturing process, the influence of interstage interference between adjacent wells on the flow of proppant migration cannot be ignored. Without simulating this process, it is impossible to truly reflect the flow of proppant migration in multi-well fracturing. reality

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