Method for the Treatment of the Obstructed Zones of the Parent Rock of Hydrocarbon-Producing Strata Adjacent to a Gas and Oil Well Drilling Zone in Order to Increase Productivity

Abstract

The invention relates to a device and method for treating the backfilled area of the productive stratum adjacent to the drilling area of oil and gas wells using high pressure pulses. The technological equipment consists of a submersible cylindrical container which is equipped with a high pressure section for accumulating the gaseous working agent, a high pressure one-way electromagnetic valve for dispensing the gaseous agent, a low pressure section where gamma radiation and material solidity detectors and data transmission equipment are located, an intermediate section where at least two one-way nozzles are located, specially arranged radially for injecting the working agent into the areas to be treated, and the technical control and operating equipment.

1 . A device for treating the backfilled area of the productive stratum adjacent to the drilling area of oil and gas wells by means of high pressure pulses, the technological equipment of which consists of a submersible cylindrical container having a high pressure section for accumulating the gaseous working agent, a high pressure one-way electromagnetic valve for dispensing the gaseous agent, a low pressure section where gamma radiation and material solidity detectors and data transmission equipment are located, an intermediate section where at least two one-way nozzles are located, specially arranged radially for injecting the working agent into the areas to be treated, and the technical control and operating equipment. 
   
   
       2 . The device for treating the backfilled area of the productive stratum adjacent to the drilling area of oil and gas wells according to  claim 1 , wherein the gas dispensing nozzles are located in the low part of the high pressure section. 
   
   
       3 . The device for treating the backfilled area of the productive stratum adjacent to the drilling area of oil and gas wells according to  claim 1 , wherein the accumulated nitrogen in the high pressure section may either be produced in situ in the section by means of a chemical reaction among several products or the high pressure section can be filled with gaseous nitrogen before submerging the container in the well. 
   
   
       4 . A method for treating the backfilled area of the stratum adjacent to the drilling area of the well, comprising the lowering into the well of the high pressure pulse generator and the subsequent treatment con pulses at intervals with high energy in the area to be treated in a consecutive manner from bottom to top by means of the generator stopping precisely in front of the areas, characterized by the creation of impulses previously produced on each chosen part with an energy of 250-400 kJ and the oscillations of the impact wave lasting until being completely dampened and a subsequent treatment by means of generating pulses with an energy of 6-8 kJ and frequency of 10-15 Hz. 
   
   
       5 . The method according to  claim 4 , wherein the pulse treatment is carried out after the generator stops in front of the backfilled areas previously located by gamma ray detector equipment and equipment for detecting the inseparability of the material installed in the generator. 
   
   
       6 . The method according to  claim 4 , wherein intense pressure is created in the drilling area interval after ending the pulse treatment and before bringing the generator out of the well to the surface. 
   
   
       7 . The method according to  claim 4 , wherein the pulse treatment is performed with the mouth of the well being sealed.