Method of Treatment and Perforation of Near-Well Zone

Abstract

A method of treatment and perforation of a near-well zone of oil and gas recovery wells, includes making an oil or gas recovery well in deposits with carbonate collectors, performing slotting opening by sand treatment with a jet containing sand and a sand carrying liquid, and using as the sand carrying liquid a sand carrying liquid which contains light hydrocarbons C 3 -C 12 .

What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims: 
     
         1 . A method of treatment and perforation of a near-well zone of oil and gas recovery wells, comprising the steps of making an oil or gas recovery well in deposits with carbonate collectors;
 performing slotting opening by sand treatment with a jet containing sand and a sand carrying liquid; and   using as the sand carrying fluid a sand carrying fluid which contains light hydrocarbons C 3 -C 12 .   
     
     
         2 . A method of treatment and perforation of a near-well zone of oil and gas recovery wells as defined in  claim 1 , further comprising performing the slotting opening with a pressure of the sand-carrying liquid selected so that the hear-well zone of the well is saturated with the light hydrocarbons. 
     
     
         3 . A method of treatment and perforation of a near-well zone of oil and gas recovery wells as defined in  claim 2 , further comprising obtaining the pressure of the sand-carrying liquid by providing a valve in a return line for conveying the sand and liquid containing jet. 
     
     
         4 . A method of treatment and perforation of a near-well zone of oil and gas recovery wells as defined in  claim 1 , further comprising using as the light hydrocarbons individual paraffins of a row C 3 -C 12  or their mixtures, including benzene, kerosene, diesel fuel. 
     
     
         5 . A method of treatment and perforation of a near-well zone of oil and gas recovery wells as defined in  claim 2 , further comprising, at and end of the slotting opening reducing the pressure of supplying the sand and liquid containing jet to reduce a speed of circulation of the sand and liquid containing jet and to provide partial deposition of sand and filling of cracks, of perforation channels and partially of a well bore to enhance uniform saturation of a formation with the light hydrocarbons to initiate a process of liquid oxidation of the light hydrocarbons inside the formation. 
     
     
         6 . A method of treatment and perforation of a near-well zone of oil and gas recovery wells as defined in  claim 1 , further comprising heating the near-well zone, and after the heating pumping air into the well to produce an efficient acting agent comprising a mixture of carbonic acids and solvents. 
     
     
         7 . A method of treatment and perforation of a near-well zone of oil and gas recovery wells as defined in  claim 6 , further comprising performing the heating to a temperature of 150-200 degrees C., and performing the pumping of air in a quantity of 2,500-12,500 cub meters on 1 meter of interval of perforation. 
     
     
         8 . A method of treatment and perforation of a near-well zone of oil and gas recovery wells as defined in  claim 6 , wherein the heating includes heating in a manner selected from the group consisting of heating by reactants which generate heat during their reaction and by a depth electric heater.