Research on temporary plugging refracturing technology for shale gas wells

According to the variation law of stress induced by hydraulic fractures during the initial fracturing of shale gas wells, the temporary plugging refracturing technology was studied. Based on the research on the mechanism of fracture reorientation from temporary plugging, the process parameters (such as the particle size combination of the temporary plugging agent, the temporary plugging timing, and the amount of temporary plugging agent) were optimized, and the key material for temporary plugging were evaluated. Temporary plugging refracturing technology suitable for shale gas horizontal well was initially formed. Excellent results of trial test were achieved and the production rate after refracturing was increased by 5 times compared with that before stimulation. This study can provide some reference for temporary plugging refracturing of shale gas wells.