The research is devoted to a discussion of the impact of fracture parameters in the curves of changes in pressure and flow rate of the injected fluids during hydrodynamic studies by established pumping regimes in the injection well with a crack fracturing. Modeling was performed at various parameters of the layer and technogenic fracture. Researched variety of deviation cases from the researched technology, in particular, untimely transition from one mode to another, a violation of the mode sequences and etc.