Bypass steam injection and production completion system

Abstract

A completion for steam injection and production includes a production tubing connected to a stinger, the production tubing having a continuous conduit extending from a Y-tool to an inverted Y-tool, a downhole steam generator (DSG) having a discharge conduit extending from the DSG to the inverted Y-tool, a bypass conduit extending from the Y-tool to the DSG, and a fuel supply tubing connected to the DSG. An artificial lift device may be incorporated into the completion.

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 production tubing extending from the surface to a stinger landed in the lower completion, the production tubing having a continuous conduit extending from a Y-tool to an inverted Y-tool;   a bypass conduit extending from the Y-tool to the DSG;   a discharge conduit extending from the DSG to the inverted Y-tool; and   a fuel supply tubing communicating a fuel supply to the DSG.   
     
     
         7 . The method of  claim 6 , wherein the generating steam comprises:
 communicating a water supply to the DSG;   communicating the fuel supply to the DSG through the fuel supply tubing; and   communicating an air supply to the DSG through the production tubing and the bypass conduit.   
     
     
         8 . The method of  claim 7 , wherein the water supply is communicated to the DSG through a water supply tubing. 
     
     
         9 . The method of  claim 6 , wherein:
 the generating steam comprises:
 communicating a water supply to the DSG; 
 communicating the fuel supply to the DSG through the fuel supply tubing; and 
 communicating an air supply to the DSG through the production tubing and the bypass conduit; and 
   the producing comprises:
 communicating formation fluid from below the lower completion through the production tubing. 
   
     
     
         10 . The method of  claim 1 , wherein the upper completion comprises:
 a production tubing extending from the surface to a stinger landed in the lower completion, the production tubing having a continuous conduit extending from a Y-tool to an inverted Y-tool;   a bypass conduit extending from the Y-tool to the DSG;   a discharge conduit extending from the DSG to the inverted Y-tool;   an artificial lift device incorporated in the continuous conduit; and   a fuel supply tubing communicating a fuel supply to the DSG.   
     
     
         11 . The method of  claim 10 , wherein:
 the generating steam comprises:
 communicating a water supply to the DSG; 
 communicating the fuel supply to the DSG through the fuel supply tubing; and 
 communicating an air supply to the DSG through the production tubing and the bypass conduit; and 
   the producing comprises:
 communicating formation fluid from below the lower completion through the production tubing; and 
 operating the artificial lift device. 
   
     
     
         12 . A completion for steam injection and production, the completion comprising:
 a production tubing connected to a stinger, the production tubing having a continuous conduit extending from a Y-tool to an inverted Y-tool;   a downhole steam generator (DSG) having a discharge conduit extending from the DSG to the inverted Y-tool;   a bypass conduit extending from the Y-tool to the DSG; and   a fuel supply tubing connected to the DSG.   
     
     
         13 . The completion of  claim 12 , comprising a water supply tubing connected to the DSG. 
     
     
         14 . The completion of  claim 13 , comprising:
 a jet pump incorporated in the continuous conduit; and   a control valve coupled between the water supply tubing and the production tubing to actuate the jet pump.   
     
     
         15 . The completion of  claim 12 , comprising an artificial lift device incorporated in the continuous conduit. 
     
     
         16 . The completion of  claim 12 , comprising:
 a barrier located in the continuous conduit; and   a one-way valve located in the discharge conduit of the DSG allowing one-way flow from the DSG.   
     
     
         17 . A well system, comprising:
 a stinger landed in a packer located in a wellbore between a formation and a surface;   a production tubing extending from the surface to the stinger, the production tubing having a continuous conduit extending from a Y-tool to an inverted Y-tool;   a downhole steam generator (DSG) having a discharge conduit extending from the DSG to the inverted Y-tool;   a bypass conduit extending from the Y-tool to the DSG;   a fuel supply tubing communicating a fuel supply to the DSG;   a water supply in communication with the DSG; and   a surface air supply in communication with the DSG through the production tubing and the bypass conduit.   
     
     
         18 . The well system of  claim 17 , wherein the water supply is in communication with the DSG through a water supply tubing. 
     
     
         19 . The well system of  claim 17 , comprising an artificial lift device incorporated in the continuous conduit. 
     
     
         20 . The well system of  claim 17 , comprising:
 a barrier located in the continuous conduit; and   a one-way valve located in the discharge conduit of the DSG allowing one-way flow from the DSG.