  Study of the structure and dynamics of the nucleon has been deeply renewed
with the advent of a parameterization of the partonic structure of the nucleon
in terms of the Generalized Parton Distributions (GPDs). Encoding the
correlations between the elementary constituents of the nucleon, GPDs allow a
3-dimensional imaging of the nucleon from the dynamical link between the
transverse position and the longitudinal momentum of partons. Double Deeply
Virtual Compton Scattering (DDVCS) corresponds to the scattering from the
nucleon of a virtual photon that finally generates a lepton pair, where the
final leptons can be either an electron or a muon pair. The virtuality of the
final photon allows to investigate in a decorrelated way the initial and
transferred momentum dependences of the GPDs. This unique feature of DDVCS is
of relevance, among others, for the determination of the transverse parton
densities and the distribution of nuclear forces. This proceeding discusses
preliminary model-predicted DDVCS experimental projections at JLab12 and
indicates the impact of potential DDVCS experiments.
