Gas and Water Breakthrough Detection

Abstract

Example computer-implemented methods and systems for gas and water breakthrough detection in producing wells are provided. One example computer-implemented method includes receiving flow rate measurement data of produced gas and produced oil of a producing well in a subsurface reservoir. Composition measurement data of the produced gas and the produced oil are received. An occurrence of a producing well breakthrough of gas injected into the subsurface reservoir from one or more injection wells is detected based on the received flow rate measurement data and the received composition measurement data.

We claim: 
     
         1 . A computer-implemented method comprising:
 receiving flow rate measurement data of produced water and produced oil of a producing well in a subsurface reservoir;   receiving salinity measurement data of the produced water of the producing well;   detecting, based on the received flow rate measurement data and the received salinity measurement data, an occurrence of a producing well breakthrough of water injected into the subsurface reservoir from one or more injection wells; and   enhancing oil recovery from the producing well based on the detected occurrence of the producing well breakthrough of the injected water.   
     
     
         2 . The computer-implemented method of  claim 1 , wherein detecting the occurrence of the producing well breakthrough of the injected water comprises:
 determining, based on the received flow rate measurement data, that an increasing trend of water cut of the produced water occurs within a predetermined period of time;   determining, based on the received salinity measurement data, that a decreasing trend of salinity of the produced water of the producing well occurs within the predetermined period of time; and   in response to determining that both the increasing trend and the decreasing trend occur within the predetermined period of time, detecting the occurrence of the producing well breakthrough of water injected into the subsurface reservoir from the one or more injection wells.   
     
     
         3 . The computer-implemented method of  claim 1 , wherein the one or more injection wells are adjacent to the producing well. 
     
     
         4 . The computer-implemented method of  claim 1 , wherein the flow rate measurement data and the salinity measurement data are from a multiphase tester coupled to the producing well. 
     
     
         5 . The computer-implemented method of  claim 4 , wherein measurement data of the multiphase tester further comprises flow measurement data of produced gas from the producing well. 
     
     
         6 . The computer-implemented method of  claim 5 , wherein the multiphase tester is a surface multiphase tester. 
     
     
         7 . A computer-implemented system comprising:
 one or more computers; and   one or more computer memory devices interoperably coupled with the one or more computers and having tangible, non-transitory, machine-readable media storing one or more instructions that, when executed by the one or more computers, cause the computer-implemented system to perform operations comprising:
 receiving flow rate measurement data of produced gas and produced oil of a producing well in a subsurface reservoir; 
 receiving composition measurement data of the produced gas and the produced oil; 
 detecting, based on the received flow rate measurement data and the received composition measurement data, an occurrence of a producing well breakthrough of gas injected into the subsurface reservoir from one or more injection wells; and 
 enhancing oil recovery from the producing well based on the detected occurrence of the producing well breakthrough of the injected gas. 
   
     
     
         8 . The computer-implemented system of  claim 7 , wherein detecting the occurrence of the producing well breakthrough of the injected gas comprises:
 determining, based on the received flow rate measurement data, that a first increasing trend of gas oil ratio (GOR) of the produced gas and the produced oil occurs within a predetermined period of time;   determining, based on the received composition measurement data, that a second increasing trend of a total percentage of compositions of the injected gas in produced fluids of the producing well occurs within the predetermined period of time; and   in response to determining that both the first increasing trend and the second increasing trend occur within the predetermined period of time, detecting the occurrence of the producing well breakthrough of the injected gas.   
     
     
         9 . The computer-implemented system of  claim 7 , wherein the one or more injection wells are adjacent to the producing well. 
     
     
         10 . The computer-implemented system of  claim 7 , wherein the composition measurement data comprises mole fraction measurement data of compositions of the produced gas and the produced oil. 
     
     
         11 . The computer-implemented system of  claim 7 , wherein the flow rate measurement data and the composition measurement data are from a multiphase tester coupled to the producing well. 
     
     
         12 . The computer-implemented system of  claim 11 , wherein measurement data of the multiphase tester further comprises salinity measurement data of produced water from the producing well. 
     
     
         13 . The computer-implemented system of  claim 12 , wherein the multiphase tester is a surface multiphase tester.