Hydraulic fracture initiation and propagation in the presence of multiple fluid injection sources and under far-field stresses is investigated experimentally utilizing a novel fracturing cell. Porous test specimens with injection points in different configurations are placed between two transparent plates. Experiments are conducted to examine hydraulic fracture growth in proximity to a constant pressure injection source as well as propagation of multiple neighboring fractures under different injection conditions. The fracturing process is recorded using a high resolution digital camera. A variety of fracture behavior is observed in these experiments that demonstrate the interplay between high pore pressure regions, the applied contrast in far-field stresses, and fluid injection scheme and configuration of injectors.

This content is only available via PDF.
You can access this article if you purchase or spend a download.