FracSeis is a seismic survey technology that images natural subsurface fractures and induced fracture networks created with hydraulic fracturing. FracSeis data can be acquired as a passive survey, as well as from an actively sourced, conventional high-fold 3-D survey. Over 25 years in development, the base field methods have been used in a wide range of geologies and hydraulic fracturing applications. It is a highly proven and published geophysical tool for exploration and exploitation.