Process for enhanced oil recovery using capture of carbon dioxide

Abstract

A process for enhanced oil recovery includes the steps of producing steam in at least a first pressure range and a second pressure range, passing the steam of the first pressure range to a steam turbine so as to produce power therefrom, passing the steam of the second pressure range to an amine capture system such that carbon dioxide is delivered therefrom, and injecting the carbon dioxide from the amine capture system into a well for enhanced oil recovery. Steam of a third pressure range can be passed to an absorption chiller so as to cool a liquid therein. The first pressure range is greater than the second pressure range.

I claim: 
     
         1 . A process for enhanced oil recovery from a well, the process comprising:
 producing steam in at least a first pressure range and a second pressure range;   passing the steam of the first pressure range to a steam turbine so as to produce power therefrom;   passing the steam of the second pressure range to an amine capture system such that carbon dioxide is delivered therefrom; and   injecting the carbon dioxide from said amine capture system into a well for enhanced oil recovery.   
     
     
         2 . The process of  claim 1 , the step of producing steam further comprising:
 producing steam in a third pressure range; and   passing the steam of the third pressure range to an absorption chiller so as to cool a liquid therein.   
     
     
         3 . The process of  claim 2 , said first pressure range having a pressure greater than a pressure of said second pressure range, said second pressure range having a pressure greater than a pressure of said third pressure range. 
     
     
         4 . The process of  claim 1 , passing the steam of the second pressure range to a dehydration unit so as to dry the natural gas passing therethrough. 
     
     
         5 . The process of  claim 1 , further comprising:
 passing the steam of the second pressure range to a heater treater;   pumping oil and water from the well into said heater treater;   heating the pumped oil and water in the heater treater with passed steam of the second pressure range; and   separating water from the heated pumped oil and water in the heater treater.   
     
     
         6 . The process of  claim 1 , the step of producing steam comprising:
 operating a heat recovery steam generator so as to produce the steam and to produce an exhaust;   delivering the exhaust to the amine capture system; and   separating carbon dioxide from the exhaust by said amine capture system.   
     
     
         7 . The process of  claim 6 , further comprising:
 producing energy from a combustion turbine; and   operating said combustion turbine so as to provide power to said heat recovery steam generator.   
     
     
         8 . The process of  claim 1 , the step of injecting comprising:
 compressing the carbon dioxide to a pressure of up to 2000 p.s.i.g.; and   injecting the compressed carbon dioxide into the well.   
     
     
         9 . A process for enhanced oil recovery from a well, the process comprising:
 producing steam in at least two pressure ranges;   passing the steam of one pressure range to an amine capture system such that carbon dioxide is delivered therefrom:   passing steam of the other pressure range to an absorption chiller so as to cool a liquid therein:   passing the cooled liquid to said amine capture system; and   injecting the carbon dioxide from the amine capture system into a well for enhanced oil recovery.   
     
     
         10 . The process of  claim 9 , further comprising:
 producing steam of another pressure range; and   passing the steam of said another pressure range to a steam turbine so as to produce power therefrom.   
     
     
         11 . The process of  claim 9 , further comprising:
 operating a heat recovery steam generator so as to produce the steam of the at least two pressure range.   
     
     
         12 . The process of  claim 9 , the steps of passing the steam comprising:
 selectively moving steam of said one pressure range to said amine capture system and steam of the other pressure range to said absorption chiller.   
     
     
         13 . The process of  claim 9 , further comprising:
 passing the steam of the one pressure range to a dehydration unit so as to dry natural gas passing therethrough.   
     
     
         14 . The process of  claim 9 , further comprising:
 passing the steam of the one pressure range to a heater treater;   pumping oil and water from the well into said heater treater;   heating the pumped oil and water in the heater treater with passed steam of said one pressure range; and   separating the oil from the heated pumped oil and water in the heater treater.   
     
     
         15 . The process of  claim 9 , the step of producing steam comprising:
 operating a heat recovery steam generator so as to produce the steam and to produce an exhaust;   delivering the exhaust to the amine capture system; and   separating carbon dioxide from the exhaust by said amine capture system.   
     
     
         16 . The process of  claim 15 , further comprising:
 producing energy from a combustion turbine; and   operating said combustion turbine so as to provide power to said heat recovery steam generator.   
     
     
         17 . A process for enhanced oil recovery from a well, the process comprising:
 producing steam from a heat recovery steam generator,   passing the steam from the heat recovery steam generator to an amine capture system;   delivering a mixture of carbon dioxide and natural gas to said amine capture system;   operating said amine capture system such that carbon dioxide and natural gas are passed separately therefrom; and   injecting the carbon dioxide from said amine capture system into the well for enhanced oil recovery.   
     
     
         18 . The process of  claim 17 , further comprising:
 producing steam of another pressure from said heat recovery steam generator;   passing said steam of another pressure to an absorption chiller so as to cool a liquid therein; and   introducing the cooled liquid to said amine capture system so as to cool the amine therein.   
     
     
         19 . The process of  claim 17 , further comprising:
 producing steam of a further pressure from said heat recovery steam generator;   passing the steam of the further pressure to a steam turbine so as to drive said steam turbine; and   producing power from said steam turbine.   
     
     
         20 . The process of  claim 17 , further comprising:
 operating said heat recovery steam generator so as to produce the steam and an exhaust;   delivering the exhaust to said amine capture system; and   separating carbon dioxide from the exhaust by said amine capture system.   injecting the carbon dioxide from said amine capture system into a well for enhanced oil recovery.