WELL OPERATION STIMULATION Russian patent published in 2014 - IPC E21B43/267 C09K8/80 

FIELD: oil-and-gas industry.

SUBSTANCE: invention can be used in well exposing the bed with interleaving and inhomogeneous reservoirs. Proposed method comprises test injection of frac fluid and bundle of frac fluids with proppant, correction of frac project and execution of the main frac process. For said interleaving and inhomogeneous reservoirs that feature different filtration capacity of every stringers, main hydro frac is performed with the use of proppant fraction including initial fraction of 20/40 mesh and main coarse fraction of 12/18 mesh and larger at proppant concentration of not over 500 kg/m³. Concentration is increased smoothly in amount of not over 50 kg/m³ at every step starting from second step. At final step of proppant injection, fluid flow rate is decreased to constriction of wellhead pressure increase.

EFFECT: simulation of well exposing the inhomogeneous bed.