Investigation on acid fracturing treatment in limestone formation based on true tri-axial experiment

Acid fracturing treatment is the most effective method for stimulating limestone formations, which are abundant in the northeast Sichuan basin of China. The effective acid etching improves the fracture width, resulting in high fracture conductivity, while fracture propagation behavior is always affected by discontinuities and the fractured vuggy structure. Hence, the fracture geometry differs from that in homogeneous formations. However, the...