METHOD OF INTENSIFICATION OF HYDROCARBONS PRODUCTION USING HORIZONTAL WELLS Russian patent published in 2017 - IPC E21B43/16 E21B28/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry,

namely, to wave technology of combined action on productive formations using horizontal wells. Method means placing hydraulically connected to the well head through the upper obstacle-reflector column two tubing - TS string of different length in the casing string. One column of TS ends at the inlet to the horizontal section of the well. Other TS ended near the bottom of the casing string. This bottom is outlet obstacle-reflector, forming together with upper obstacle volume, inside of which is the liquid column working agent. Creating homogeneous wave field on the horizontal section of casing string in the liquid by installing vibration generators on the ends of the TS in the casing string. Vibration amplitude is increased. Vibration is controlled with recording of vibrations supplied via the cable from the downhole level meter to ground recording unit. Matching of oscillation phase on horizontal section of the well casing string is provided after well start-up in operating conditions of hydrocarbons production by change of the initially selected oscillation frequency output pressure generators by automatic or manual variation of flow rates of working agent through generators provided that flow rate in steady-state conditions. Initial length of TS, prior to lowering into well is selected through calculation using the analytic expressions in case phases of oscillations match and amplitudes of oscillations equality on horizontal section of casing string for a selected frequency action on formation.

EFFECT: technical result - increased output of productive formation as a whole and on horizontal sections of the well due to wave action optimization.

1 cl, 2 dwg