WELL BORE ZONE TREATMENT METHOD AND CHARGE Russian patent published in 2006 - IPC E21B43/263 

FIELD: oil and gas production and mining industry, particularly to increase well bore zone permeability by eroding thereof along with additional crack formation.

SUBSTANCE: method involves arranging solid-fuel charge within productive formation interval inside well, wherein the solid-fuel charge is composed of a number of cylindrical blocks with longitudinal through and/or blind channels and cylindrical block burning initiation means; combusting solid-fuel charge to provide pressure of gases emitting during solid-fuel charge burning greater than fracturing pressure; forming star cracks during monotonic or stepped pressure change at rate of not less than 10³ MPa/s, wherein necessary volume of gases emitting during solid-fuel charge burning are determined from initial cylindrical block burning surface area. To determine above initial block surface area cylindrical block length, cross-sectional area, number of blocks, number of block channels, channel depths and shapes and channel location over each block surface are determined in view of analytic expression.

EFFECT: increased quality of well bore zone due to usage of solid-fuel charge with designed initial burning surface and provision of hydrodynamic connection between well and formation and due to above solid-fuel charge usage in perforating equipment.

17 cl, 4 dwg