Steam injection and production completion system

Abstract

A completion for steam injection and production includes a production tubing connected to the stinger, a downhole steam generator (DSG) having a discharge connected to the production tubing through an inverted Y-tool, a fuel supply tubing extending between the DSG and a surface fuel supply and an air supply tubing extending between the DSG and a surface fuel supply. The completion can have an artificial lift device incorporated in the production tubing.

What is claimed is: 
     
         1 . A method, comprising:
 generating steam at a downhole steam generator (DSG) incorporated in an upper completion that is deployed in a wellbore;   injecting the steam into a formation located below a lower completion deployed in the wellbore;   terminating steam generation; and   producing formation fluid from the formation through the upper completion after the terminating steam generation.   
     
     
         2 . The method of  claim 1 , wherein the upper completion is not pulled out of the wellbore between the terminating steam generation and the producing. 
     
     
         3 . The method of  claim 1 , wherein the producing comprises operating an artificial lift device incorporated in the upper completion. 
     
     
         4 . The method of  claim 1 , wherein the producing comprises operating an artificial lift device incorporated in the upper completion, the artificial lift device comprising one selected from a pump, a gas lift device, and a jet pump. 
     
     
         5 . The method of  claim 1 , wherein:
 the upper completion is not pulled out of the wellbore between the terminating steam generation and the producing; and   the producing comprises operating an artificial lift device incorporated in the upper completion.   
     
     
         6 . The method of  claim 1 , wherein the upper completion comprises:
 a stinger landed in the lower completion;   a production tubing extending from the surface to the stinger; and   a discharge of the DSG connected to the production tubing through an inverted Y-tool.   
     
     
         7 . The method of  claim 6 , wherein the producing comprises operating an artificial lift device incorporated in the upper completion. 
     
     
         8 . The method of  claim 6 , comprising a one-way valve located in the discharge of the DSG allowing one-way flow from the DSG. 
     
     
         9 . The method of  claim 1 , wherein the upper completion comprises:
 a stinger landed in the lower completion;   a production tubing extending from the surface to the stinger;   a discharge of the DSG connected to the production tubing through an inverted Y-tool;   an artificial lift device incorporated in the production tubing;   a fuel supply tubing extending between the DSG and a surface fuel supply; and   an air supply tubing extending between the DSG and a surface air supply.   
     
     
         10 . The method of  claim 9 , wherein:
 the upper completion is not pulled out of the wellbore between the terminating steam generation and the producing; and   the producing comprises operating the artificial lift device incorporated in the upper completion.   
     
     
         11 . A completion for steam injection and production, the completion comprising:
 a stinger;   a production tubing connected to the stinger;   a downhole steam generator (DSG) having a discharge connected to the production tubing through an inverted Y-tool;   a fuel supply tubing connected to the DSG; and   an air supply tubing connected to the DSG.   
     
     
         12 . The completion of  claim 11 , comprising a water supply tubing connected to the DSG. 
     
     
         13 . The completion of  claim 12 , comprising:
 a jet pump incorporated in the production tubing; and   a control valve coupled between the water supply tubing and the production tubing to actuate the jet pump.   
     
     
         14 . The completion of  claim 11 , comprising an artificial lift device incorporated in the production tubing. 
     
     
         15 . The completion of  claim 11 , comprising a one-way valve located in the discharge of the DSG allowing one-way flow from the DSG. 
     
     
         16 . A well system, comprising:
 a packer landed in a wellbore between a formation and a surface;   a stinger landed in the packer;   a production tubing connected to the stinger;   a downhole steam generator (DSG) having a discharge connected to the production tubing through an inverted Y-tool;   a fuel supply tubing extending between the DSG and a surface fuel supply;   an air supply tubing extending between the DSG and a surface air supply; and   a water supply in communication with the DSG.   
     
     
         17 . The well system of  claim 16 , comprising a water supply tubing connected between the DSG and the water supply. 
     
     
         18 . The well system of  claim 16 , comprising an artificial lift device incorporated in the production tubing. 
     
     
         19 . The well system of  claim 16 , comprising a one-way valve located in the discharge of the DSG allowing one-way flow from the DSG. 
     
     
         20 . The well system of  claim 16 , comprising:
 a one-way valve located in the discharge of the DSG allowing one-way flow from the DSG; and   an artificial lift device incorporated in the production tubing, the artificial lift device comprising one selected from a pump, a gas lift device, and a jet pump.