Dynamic monitoring test apparatus for propagation of fractures from triaxial pulse loading hydraulic fracturing

Abstract

The invention discloses a dynamic monitoring test apparatus for propagation of fractures from triaxial pulse loading hydraulic fracturing and relates to physical simulation experimental system platforms for transfer pressure monitoring for fractures from triaxial hydraulic fracturing, development of fractures, and study on propagation law. The apparatus of the invention mainly comprises a liquid injection control system, a triaxial stress loading system, an intra-fracture water pressure monitoring system and an acoustic emission three-dimensional dynamic monitoring system. The apparatus has the advantages that various fracturing liquid systems under different pressures and frequencies can be injected to arrive at reservoir hydraulic fracturing under simulated triaxial stress state of different reservoirs; the functions of triaxial servo loading, real-time fracture transfer pressure monitoring and fracture three-dimensional evolution are achieved in the test process, and a study platform is provided for studying triaxial hydraulic fracturing of reservoirs; the apparatus is simple to operate, high in intelligence level and compact in structure and can provide good studies on the fracture damage mechanism of rock during hydraulic fracturing of reservoirs.

Description

technical field [0001] The invention relates to a petrophysical experiment simulation device for simulating different reservoir pressure environments, different pulse frequencies, and different fracturing fluid systems, hydraulic fracturing reservoir reconstruction experiments, real-time tracking of fluid pressure in fractures, and three-dimensional monitoring of hydraulic fracture expansion . Background technique [0002] With the continuous development of the world's energy pattern, traditional energy sources are increasingly tense and shrinking. After the success of the shale gas revolution in the United States, unconventional energy sources such as shale gas, coal bed methane and tight gas have attracted widespread attention and research worldwide. . my country's unconventional oil and gas reserves are abundant and have great potential for development, mainly concentrated in the central region, but they are characterized by complex geological conditions, deep burial, an...

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a dynamic monitoring test device for triaxial loading pulse hydraulic fracturing crack expansion, which mainly overcomes the defects in the existing test device such as no pulse pressure, crack expansion cannot be monitored in three dimensions in real time, and various monitoring systems cannot be unified and coordinated. This test system can simulate the reservoir rock under the triaxial stress state, realize pulse or continuous fluid fracturing with different fracturing fluid systems, and track and monitor the fracture propagation pressure, real-time three-dimensional monitoring of fracture propagation dynamics, and analyze the fracturing fracture. Development type and expansion, providing a research platform for the study of pulse hydraulic pressure

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