TY - JOUR
TI - Experimental study of self-supporting properties of supercritical CO2-induced fractures
AU - Li Jie
AU - Zhou Peiyao
AU - Dong Jingfeng
AU - Wang Haizhu
AU - Wang Bin
AU - Li Gensheng
AU - Tian Ganghua
AU - Zhang Guoxin
JN - Thermal Science
PY - 2024
VL - 28
IS - 4
SP - 3541
EP - 3546
PT - Article
AB - In this paper, CO2 fracturing experiments were carried out in a conglomerate  to analyze the fracture morphology, and fracture surface characteristics,  and discuss the fracture self-support mechanism. Results indicate that  compared to supercritical CO2 (SC-CO2) fracturing, SC-CO2 shock fracturing  can break through the limitations of in situ stress to develop more complex  fractures. The SC-CO2 shock fracturing induced rougher fracture surfaces.  As a direct result, rougher fractures with larger apertures have greater  permeability and conductivity, approximately three times that of SC-CO2  fracturing. This is because, under the influence of impact, shear  misalignment allows rough fracture surfaces to self-support and exfoliated  particles to act as proppant, allowing SC-CO2 fracturing to form  self-supported fractures with greater aperture and permeability.