GASDINAMIC STIMULATION METHOD AND RELATED DEVICE FOR IMPLEMENTATION THEREOF Russian patent published in 2009 - IPC E21B43/263 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to methods and means improving oil recovery of payout bed, specifically to local layer fracturing applying combustible charge. Packageless section charge is assembled and equipped through hollow jointed rod running through the central channel of charge sections which are tightened and pressed close to each other with position sleeve, while survey cable is connected to electronics module. Charge is combusted in perforation interval. Charge combustion process is real-time controlled, and charge operation characteristics such as temperature and pressure are recorded. It is carried out in effect range higher than charge combustion zone on safe distance from it. Additionally pressure is recorded directly in charge combustion zone. For this purpose in lower part of electronics module there is an additional pressure sensor provided. The jointed rod opposite to the charge has at least one radial hole performing gasdynamic connection of direct charge combustion zone through jointed rod cavity and its radial hole with additional pressure sensor area. Maximum pressures measured over charge combustion zone and directly in combustion zone, difference of these pressures, indicate pressure pulse energy in charge combustion process, consumed for formation breakdown, and pressure pulse energy in borehole. These data are compared. Increasing and decreasing pressures and temperatures shows efficient stimulation whether with or without local formation breakdown. Necessity of repeated stimulation and required energy are estimated. In case of repeated stimulation and registration of aforementioned parameters, these parameters variation between stimulation sets is estimated. Herewith nature of these changes indicating increase of formation breakdown radius and necessity of following stimulations.

EFFECT: possibility of great radius local layer fracturing, estimation of its efficiency, parameter updating with following effects and pressure pulse focusing within effect range.

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