WELL BOTTOM ZONE TREATMENT METHOD Russian patent published in 2006 - IPC E21B43/27 

FIELD: oil and gas industry, particularly productive reservoir zone treatment to stimulate fluid inflow into well.

SUBSTANCE: method involves taking rock samples from productive pool zone; simulating compression conditions, which are present in bottomhole reservoir zone at different face structures and different pressure drawdown, in taken samples; determining stresses leading to irreversible rock sample cracking or loosening and to irreversible rock penetration increase; selecting face structure and pressure drawdown corresponding to above stresses; providing pressure drawdown at face, which is not less than that selected on the base of above simulation operation; maintaining above pressure drawdown up to fluid output increase or up to fluid output increase termination; injecting chemical agent in bottomhole reservoir zone; holding the chemical agent in bottomhole reservoir zone to provide chemical reaction and removing reaction products; bringing wells into operation.

EFFECT: increased fluid output from well.

3 cl, 3 ex