ZONE CORRECTION METHOD INSIDE UNDERGROUND HYDROCARBONS-CONTAINING FORMATIONS (VERSIONS) Russian patent published in 2015 - IPC C09K8/46 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to versions of zone correction method inside underground hydrocarbons-containing formations in order to delay operating fluid breakthrough from the injector having the first value of bottomhole pressure through the zone spread towards the producer having the second value of bottomhole pressure, at that difference between the first and second values of bottomhole pressure is defined as ΔP_bh, at that the zone has void space and/or halo area formed due to production of hydrocarbons from the producer and thus allowing pressure feedback between the injector and producer through the above zone so that ΔP_bh is decreased at least per 50 pounds per square inch (psi) for twelve-hour period; at that the method includes the following operations: introducing to the zone bridging composite containing cement grout that may be injected to the zone and underground formation; creating conditions for setting of bridging composite in the zone inside underground formation within a period of time sufficient for formation of cement plug inside the zone in order to reduce flow of operating fluid between the injector and producer through the zone; introducing gel predecessor to the zone and creating conditions of its setting within a period of time sufficient for formation of gel plug inside the zone in order to reduce flow of operating fluid additionally between the injector and producer. Invention is developed in dependent claims.

EFFECT: increased efficiency of the method.

40 cl, 8 dwg, 1 tbl