Systems and methods for producing oil and/or gas

Abstract

A system for producing oil and/or gas from an underground formation comprising a first well above the formation; a second well above the formation; the first well comprises a mechanism to inject a miscible enhanced oil recovery formulation into the formation; the first well comprises a seal comprising a fluorinated polymer, the seal adapted to contain the miscible enhanced oil recovery formulation within a tubular; and the second well comprises a mechanism to produce oil and/or gas from the formation.

1 . A system for producing oil and/or gas from an underground formation comprising:
 a first well above the formation;   a second well above the formation;   the first well comprises a mechanism to inject a miscible enhanced oil recovery formulation into the formation;   the first well comprises a seal comprising a fluorinated polymer, the seal adapted to contain the miscible enhanced oil recovery formulation within a tubular; and   the second well comprises a mechanism to produce oil and/or gas from the formation.   
     
     
         2 . The system of  claim 1 , wherein the first well is at a distance of  10  meters to  1  kilometer from the second well. 
     
     
         3 . The system of  claim 1 , wherein the underground formation is beneath a body of water. 
     
     
         4 . The system of  claim 1 , further comprising a mechanism for injecting an immiscible enhanced oil recovery formulation into the formation after the miscible enhanced oil recovery formulation has been released into the formation. 
     
     
         5 . The system of  claim 1 , further comprising a miscible enhanced oil recovery formulation selected from the group consisting of a carbon disulfide formulation, a carbon oxysulfide formulation, hydrogen sulfide, carbon dioxide, octane, pentane, LPG, C2-C6 aliphatic hydrocarbons, nitrogen, diesel, mineral spirits, naptha solvent, asphalt solvent, kerosene, acetone, xylene, trichloroethane, and mixtures thereof. 
     
     
         6 . The system of  claim 5 , wherein the miscible enhanced oil recovery formulation is selected from the group consisting of a carbon disulfide formulation, a carbon oxysulfide formulation, and mixtures thereof. 
     
     
         7 . The system of  claim 1 , further comprising an immiscible enhanced oil recovery formulation selected from the group consisting of water in gas or liquid form, air, and mixtures thereof. 
     
     
         8 . The system of  claim 1 , further comprising a miscible enhanced oil recovery formulation comprising a carbon disulfide formulation. 
     
     
         9 . The system of  claim 1 , further comprising a mechanism for producing a carbon disulfide formulation. 
     
     
         10 . The system of  claim 1 , wherein the underground formation comprises an oil having a viscosity from 100 to 5,000,000 centipoise. 
     
     
         11 . A method for producing oil and/or gas comprising:
 injecting a carbon disulfide formulation into a formation from a first well;   producing oil and/or gas from the formation from a second well; and   installing a seal in the first well, the seal comprising a fluorinated polymer.   
     
     
         12 . The method of  claim 11 , further comprising recovering carbon disulfide formulation from the oil and/or gas and then injecting at least a portion of the recovered carbon disulfide formulation into the formation. 
     
     
         13 . The method of  claim 11 , wherein injecting the carbon disulfide formulation comprises injecting at least a portion of the carbon disulfide formulation into the formation in a mixture with one or more of hydrocarbons; sulfur compounds other than carbon disulfide; carbon dioxide; carbon monoxide; or mixtures thereof. 
     
     
         14 . The methods of  claim 11 , further comprising heating the carbon disulfide formulation prior to injecting the carbon disulfide formulation into the formation, or while within the formation. 
     
     
         15 . The method of  claim 11 , wherein the carbon disulfide formulation is injected at a pressure from 0 to 37,000 kilopascals above the initial reservoir pressure, where the initial reservoir pressure is measured prior to when carbon disulfide injection begins. 
     
     
         16 . The method of  claim 11 , wherein the underground formation comprises a permeability from 0.0001 to 15 Darcies. 
     
     
         17 . The method of  claim 11 , wherein any oil, as present in the underground formation prior to the injecting the carbon disulfide formulation, has a sulfur content from  0 . 5 % to  5 %. 
     
     
         18 . The method of  claim 11 , further comprising converting at least a portion of the recovered oil and/or gas into a transportation fuel. 
     
     
         19 . The method of  claim 11 , wherein the fluorinated polymer is at least 40% fluorinated. 
     
     
         20 . The method of  claim 11 , wherein the fluorinated polymer is at least 80% fluorinated. 
     
     
         21 . The method of  claim 11 , wherein the fluorinated polymer is selected from the group consisting of polytetrafluoroethylene, fluorinated ethylene-propylene copolymers, fluoroelastomers, copolymers of vinylidene fluoride and hexafluoropropylene, and perfluoroelastomers.