METHOD OF INJECTION WELL TREATMENT Russian patent published in 2003 - IPC

FIELD: technology of well production of hydrocarbons materials and directed for increase of injection well injectivity to maintain formation pressure in producing wells of deposit. SUBSTANCE: method includes sampling of rocks from producing strata of injection well or of well nearest to it. Taken samples are used for modeling the conditions of rock compression acting in bottomhole zone with various designs of bottomhole and various pressure-differentials in well. Stresses are reproduced which are resulting in deformation with cracking, loosening of rock samples and irreversible increase of their permeability. Design of injection well bottomhole, with perforation holes or horizontal slot in uncased wellbore is determined and realized. Built-up on bottomhole is pressure differential not below those obtained by modeling of rock samples. This pressure differential is maintained until changing the well over to pressure regime. EFFECT: simplified technology and efficiency of increase of well injectivity. 3 cl, 3 ex