Enzyme enhanced oil recovery (EEOR) for near wellbore treatment of oil and gas with greater than 50% barrel of oil equivalent (BOE) gas production

Abstract

Disclosed is a system for injecting an enzymatic fluid composition into a gas or gas and oil near-well bore having a wide temperature range. The enzymatic fluid composition is a treatment for reducing oil deposits, asphaltenes, waxes, scale, or other hydrocarbon materials in a gas well or a combination gas/oil well where the production of gas is greater than 50% on a barrel of oil equivalent (BOE) basis.

1 . A method of near-well bore treatment for releasing hydrocarbon deposits for wells comprising; one or more enzyme treating fluids wherein said enzyme fluid is oleophilic and said treating fluid is injected into said near-well bore of a reservoir wherein said treating fluid contacts restricting hydrocarbon particulates inhibiting the flow of gas and oil to said near-well bore; wherein surface attraction between said hydrocarbon particulates and said wellbore is reduced and said hydrocarbon particulates are subsequently or simultaneously released by said enzyme fluid such that flow restriction of said gas and said oil in the near well bore area is minimized. 
   
   
       2 . The method of near-well bore treatment as in  claim 1 , wherein said enzyme fluid injected in an area within said near-well bore releases the build up of oils, waxes, asphaltenes and other hydrocarbon particulates thereby increasing the flow of said gas, said oil, distillates or condensate gas. 
   
   
       3 . The method of near-well bore treatment as in  claim 1 , wherein said enzyme fluid is injected into an area within said near-well bore for a gas well or a gas well with oil production wherein said gas produced is greater than 50 percent barrel of oil equivalent (BOE). 
   
   
       4 . The method of near-well bore treatment as in  claim 1 , wherein said enzyme fluid reduces the surface tension of said near-well bore thereby improving the mobility and flow to said near-well bore and wherein said reduction of surface tension better displaces said gas or said oil within said well. 
   
   
       5 . The method of near-well bore treatment as in  claim 1 , wherein said enzyme fluid may be preheated prior to injection. 
   
   
       6 . The method of near-well bore treatment as in  claim 1 , wherein said enzyme fluid comprises a biological enzyme that is a protein based, non-living catalyst. 
   
   
       7 . The method of near-well bore treatment as in  claim 1 , wherein said enzyme fluid and said enzyme targets said hydrocarbon particulates such that said hydrocarbon particulates further aid in reduction of surface tension of said near-well bore surface(s) further increasing production of said gas or said oil. 
   
   
       8 . The method of near-well bore treatment as in  claim 1 , wherein said enzyme fluid is inert and does not specifically target fracturing fluids associated with fracturing, drilling or completing said well. 
   
   
       9 . The method of near-well bore treatment as in  claim 1 , wherein said enzyme does not change the chemical composition of said gas or said oil and is non-reactive with said gas freeing dissolved said gas from said oil. 
   
   
       10 . The method of near-well bore treatment as in  claim 1 , wherein said enzyme fluid reduces said hydrocarbon particulates viscosity, thereby increasing flow of said gas by reducing surface tension, decreasing contact angles with said oil, distillate, or gas as a condensate and preventing said oil or said hydrocarbon particulates from re-adhering to said near-well bore. 
   
   
       11 . The method of near-well bore treatment as in  claim 1 , wherein said enzyme fluid provides a stand-alone treatment in lieu of traditional hydrochloric or other acid treatments. 
   
   
       12 . The method of near-well bore treatment as in  claim 1 , wherein said enzyme fluid can be used together with the range of API gravity oils or with hydrocarbon deposits produced during production of said well. 
   
   
       13 . The method of near-well bore treatment as in  claim 1 , wherein said enzyme fluid may be used in said wells in a vertical or horizontal direction with most formations and permeabilities. 
   
   
       14 . The method of near-well bore treatment as in  claim 1 , wherein said enzyme fluid is allowed to soak in said well allowing said well once again producing said gas and other hydrocarbons from said well. 
   
   
       15 . The method of near-well bore treatment as in  claim 1 , wherein said enzyme fluid is environmentally benign in comparison with acid injection treatment. 
   
   
       16 . The method of near-well bore treatment as in  claim 1 , wherein said enzyme fluid comprises said enzyme in a concentration of between 0.5 and 10 percent. 
   
   
       17 . The method of near-well bore treatment as in  claim 1 , wherein said enzyme fluid injection pressure is lower than the fracture pressure of said near-well bore.