Interaction Law between Natural Fractures-Vugs and Acid-Etched Fracture during Steering Acid Fracturing in Carbonate Reservoirs

Figure 5

Experimental apparatus: (a) alternating injection system; (b) triaxial pressure loading system; (c) data collection system. High pressure alternating injection system can change fracturing fluid at any time during injection. The triaxial pressure loading system can load the pressure on the surface of the specimen by hydraulic driving. The data collection system records the pressure values per second.

(a)

(b)

(c)