Abstract
The propagation characteristic of fractures under the influence of bedding during SC-CO2 jet fracturing remains value to be studied. In order to avoid the large dispersion of natural rock property, seven types of artificial rock samples (Φ100 mm × 100 mm) with prefabricated different positions and numbers of bedding were prepared. A multifunction SC-CO2 jet system was used to conduct the SC-CO2 jet fracturing with ambient pressure. The main fractures on the surface were observed through vertical and side view after the experiment. In addition, five fracture propagation modes were summarized systematically. Finally, the fracture tortuosity parameters were obtained by quantitative analysis, and it was found that for horizontal bedding, the farther the vertical distance from the casing, the larger the fracture tortuosity formed by SC-CO2 jet fracturing; if a single fracture penetrates the bedding, the fracture tortuosity will increase.
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