Fig. 20

Fluid viscosity effects on hydraulic fracturing efficiency. (a) Activated fracture area (b) Per-fluid-volume fracture area. Notes: HF = Hydraulic fractures; BP = bedding planes; NF = natural fractures.

Fluid viscosity effects on hydraulic fracturing efficiency. (a) Activated fracture area (b) Per-fluid-volume fracture area. Notes: HF = Hydraulic fractures; BP = bedding planes; NF = natural fractures.