System and method for carbonated water injection for production surveillance and well stimulation

Abstract

A method involves detecting parameters corresponding to a hydraulic connection between wells in a reservoir. Such method includes injecting carbonated water into a CO2 injection well. The method further includes identifying a presence of the carbonated water around a CO2 recipient well. The method also includes determining at least one parameter corresponding to the hydraulic connection between the CO2 injection well and the CO2 recipient well based on the presence of the carbonated water around the CO2 recipient well.

What is claimed is: 
     
         1 . A method for detecting parameters corresponding to a hydraulic connection between wells in a reservoir, comprising:
 injecting carbonated water into a CO 2  injection well;   identifying a presence of the carbonated water around a CO 2  recipient well; and   determining at least one parameter corresponding to the hydraulic connection between the CO 2  injection well and the CO 2  recipient well based on the presence of the carbonated water around the CO 2  recipient well.   
     
     
         2 . The method of  claim 1 , wherein identifying the presence of carbonated water comprises measuring a quantity of CO 2  contained in the carbonated water. 
     
     
         3 . The method of  claim 1 , wherein identifying the presence of the carbonated water comprises measuring gas into which the carbonated water has been dissolved. 
     
     
         4 . The method of  claim 1 , wherein identifying the presence of carbonated water comprises measuring oil into which the carbonated water has been dissolved. 
     
     
         5 . The method of  claim 1 , comprising mixing an identifying agent into the carbonated water prior to injecting the carbonated water into the CO 2  injection well. 
     
     
         6 . The method of  claim 5 , wherein the identifying agent comprises a C 13  isotope. 
     
     
         7 . The method of  claim 1 , wherein the carbonated water comprises a homogeneous mixture. 
     
     
         8 . The method of  claim 1 , comprising mapping the hydraulic connection between the CO 2  injection well and the CO 2  recipient well. 
     
     
         9 . The method of  claim 1 , wherein the reservoir has multiple CO 2  recipient wells. 
     
     
         10 . The method of  claim 1 , comprising generating a well spacing plan based on the hydraulic connection between the CO 2  injection well and the CO 2  recipient well. 
     
     
         11 . The method of  claim 10 , comprising drilling at least one well in accordance with the well spacing plan. 
     
     
         12 . The method of  claim 1 , wherein identifying the presence of the carbonated water is performed by a fluid flow device. 
     
     
         13 . The method of  claim 1 , comprising performing at least one of a hydraulic fracturing operation or a hydrocarbon production operation based on hydraulic connection between the CO 2  injection well and the CO 2  recipient well. 
     
     
         14 . The method of  claim 1 , comprising periodically monitoring the presence of CO 2  at the CO 2  recipient well. 
     
     
         15 . A well system, comprising:
 a pump for injecting carbonated water into a CO 2  injection well in order to permit detecting of parameters corresponding to a hydraulic connection between the CO 2  injection well and a CO 2  recipient well;   a detection device that identifies a presence of the carbonated water around the CO 2  recipient well; and   a computing device that determines at least one parameter corresponding to the hydraulic connection between the CO 2  injection well and the CO 2  recipient well based on the presence of the carbonated water around the CO 2  recipient well.   
     
     
         16 . The well system of  claim 15 , wherein the presence of carbonated water is identified by measuring a quantity of CO 2  contained in the carbonated water. 
     
     
         17 . The well system of  claim 15 , wherein the presence of the carbonated water is identified by measuring gas into which the carbonated water has been dissolved. 
     
     
         18 . The well system of  claim 15 , wherein the presence of carbonated water is identified by measuring oil into which the carbonated water has been dissolved. 
     
     
         19 . The well system of  claim 15 , wherein an identifying agent is mixed into the carbonated water prior to injecting the carbonated water into the CO 2  injection well. 
     
     
         20 . The well system of  claim 19 , wherein the identifying agent comprises a C 13  isotope. 
     
     
         21 . The well system of  claim 15 , wherein the carbonated water comprises a homogeneous mixture. 
     
     
         22 . The well system of  claim 15 , wherein the computing device maps the hydraulic connection between the CO 2  injection well and the CO 2  recipient well. 
     
     
         23 . The well system of  claim 15 , wherein the computing device generates a well spacing plan based on the hydraulic connection between the CO 2  injection well and the CO 2  recipient well. 
     
     
         24 . A method for detecting parameters corresponding to a hydraulic connection between wells in a reservoir, comprising:
 injecting a substance dissolved in water into an injection well, the substance selected from a group consisting of carbon monoxide, nitrogen, hydrogen or toluene;   identifying a presence of the substance around a recipient well; and   determining at least one parameter corresponding to the hydraulic connection between the injection well and the recipient well based on the presence of the substance water around the recipient well.