Shale gas hydraulic fracturing physical simulation test system

Abstract

The invention discloses a shale gas hydraulic fracturing physical simulation test system comprising a true tri-axial module, a hydraulic servo pumping pressure module, an acoustic emission module, a hydraulic sand fracturing module, and a control device. The true tri-axial module includes a test sample placement room, square pressing blocks, and first hydraulic devices connected with the square pressing blocks respectively. The acoustic emission module includes acoustic emission probes installed inside the test sample placement room, and a full-information acoustic emission analyzer host. The hydraulic servo pumping pressure module includes box bodies and high-pressure injection pumps, and hydraulic fracturing fluid in the box bodies is connected with a pre-arranged wellbore in a test sample through pipes. The hydraulic sand fracturing module includes a sand fluid container and a second hydraulic device, and the second hydraulic device includes a second hydraulic oil tank body, a second hydraulic motor-driven pump, a second three-level four-way electric hydraulic servo valve, a second relief valve, a second hydraulic cylinder, and a second hydraulic piston. The shale gas hydraulic fracturing physical simulation test system of the invention can simulate hydraulic sand fracturing experiments under different formation stress conditions.

Description

technical field [0001] The invention relates to the technical field of unconventional oil and gas reservoir development, in particular to a shale gas hydraulic fracturing physical simulation test system. Background technique [0002] One of the core technologies of shale gas exploitation is to fracturing the reservoir, that is, through horizontal wells combined with hydraulic fracturing technology to transform the reservoir to communicate natural fractures, and then generate a fracture network, and then use proppant to support the fractures. In this way, artificially increasing reservoir seepage channels can be realized. The operation mode of "well factory" has become one of the most efficient ways to develop shale gas. The purpose of smashing the reservoir is such an efficient and low-cost operation mode. Therefore, ascertaining and mastering the initiation conditions, extension rules and influencing factors of shale hydraulic fracturing fractures is very important for hy...

AI Technical Summary

Problems solved by technology

However, there are still many bottlenecks in the development of physical simulation of shale gas hydraulic fracturing, such as hydraulic sand-bearing fracturing, because various pumps and hydraulic pumps cannot pump sand-containing liquid, and the problem of sand settling also hinders hydraulic sand-containing fracturing. The main factor in the development of fracturing physical simulation, so it is very important to realize the physical simulation of hydraulic sand fracturing

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