The invention relates to an experimental device and method for simulating single-crack flowback after
shale gas fracturing. The experimental device is mainly composed of a pump set, a device body, a
hydraulic pressure and
temperature control device, and a
tail monitoring and
liquid waste disposal device. The device body mainly refers to an improved
rock core clamp holder specially used for manufacturing a
rock core, confining pressure is applied through the
hydraulic pressure device, and the
temperature control device heats hydraulic oil to form a high temperature for
simulation of the stratum environment; in the experimental process, displacement meters on the upper side face and the lower side face of the
rock core clamp holder can detect crack displacement change, and the sand
production rate and the fluid flow speed can be monitored in real time through the
tail monitoring device. By the adoption of the experimental device and method, the stratum high-temperature and high-pressure environment can be simulated, and on the premise that the flow
conductivity of cracks of different crack lengths and crack widths is detected, the crack pressure drop, the sand
production rate, the propping agent embedding degree and the propping agent
backflow and settlement rule are detected; moreover, artificial marble rock cores are used, and the environment gets more close to the true stratum environment compared with the mode that steel blocks are used for simulating cracks.