Methods and systems for resolving well completion problems in injection networks

Abstract

This disclosure describes methods and systems for solving well completion problems in injection networks. A method involves generating respective water injection hydraulic simulation models for a plurality of injection wells in a water injection network, the water injection network including a plurality of well completion segments; generating, using the respective water injection hydraulic simulation models, respective simulated pressure profiles for the plurality of injection wells at one or more injection rates; determining respective internal yield pressure limits for the plurality of well completion segments; determining, based on the respective internal yield pressure limits and the respective simulated pressure profiles, a potential leak problem in the water injection network; and performing a corrective action to resolve the potential leak problem.

What is claimed is: 
     
         1 . A method comprising:
 generating respective water injection hydraulic simulation models for a plurality of injection wells in a water injection network, the water injection network comprising a plurality of well completion segments;   generating, using the respective water injection hydraulic simulation models, respective simulated pressure profiles for the plurality of injection wells at one or more injection rates;   determining respective internal yield pressure limits for the plurality of well completion segments;   determining, based on the respective internal yield pressure limits and the respective simulated pressure profiles, a potential leak problem in the water injection network; and   performing a corrective action to resolve the potential leak problem.   
     
     
         2 . The method of  claim 1 , wherein generating the water injection hydraulic simulation model for the plurality of injection wells comprises:
 generating the water injection hydraulic simulation model for the plurality of injection wells using a steady-state multiphase flow simulation software.   
     
     
         3 . The method of  claim 1 , further comprising:
 maintaining up-to-date versions of the respective water injection hydraulic simulation models based on real-time injection data.   
     
     
         4 . The method of  claim 1 , wherein the one or more injection rates comprise a plant baseline injection rate. 
     
     
         5 . The method of  claim 1 , wherein determining respective internal yield pressure limits for the plurality of well completion segments comprises:
 determining that a first well completion segment is damaged; and   responsively using a de-rating method to calculate a de-rated internal yield pressure value for the first well completion segment, wherein the de-rated internal yield pressure value is the respective internal yield pressure limit for the first well completion segment.   
     
     
         6 . The method of  claim 5 , wherein the de-rating method is one of: a Default Designating Method (DDM), a Simple De-rating Method (SDM), or an Explicit De-rating Method (EDM). 
     
     
         7 . The method of  claim 6 , wherein the de-rating method is selected based on an extent of the damage to the first well completion segment. 
     
     
         8 . A system comprising:
 one or more processors configured to perform operations comprising:
 generating respective water injection hydraulic simulation models for a plurality of injection wells in a water injection network, the water injection network comprising a plurality of well completion segments; 
 generating, using the respective water injection hydraulic simulation models, respective simulated pressure profiles for the plurality of injection wells at one or more injection rates; 
 determining respective internal yield pressure limits for the plurality of well completion segments; 
 determining, based on the respective internal yield pressure limits and the respective simulated pressure profiles, a potential leak problem in the water injection network; and 
 performing a corrective action to resolve the potential leak problem. 
   
     
     
         9 . The system of  claim 8 , wherein generating the water injection hydraulic simulation model for the plurality of injection wells comprises:
 generating the water injection hydraulic simulation model for the plurality of injection wells using a steady-state multiphase flow simulation software.   
     
     
         10 . The system of  claim 8 , the operations further comprising:
 maintaining up-to-date versions of the respective water injection hydraulic simulation models based on real-time injection data.   
     
     
         11 . The system of  claim 8 , wherein the one or more injection rates comprise a plant baseline injection rate. 
     
     
         12 . The system of  claim 8 , wherein determining respective internal yield pressure limits for the plurality of well completion segments comprises:
 determining that a first well completion segment is damaged; and   responsively using a de-rating method to calculate a de-rated internal yield pressure value for the first well completion segment, wherein the de-rated internal yield pressure value is the respective internal yield pressure limit for the first well completion segment.   
     
     
         13 . The system of  claim 12 , wherein the de-rating method is one of: a Default Designating Method (DDM), a Simple De-rating Method (SDM), or an Explicit De-rating Method (EDM). 
     
     
         14 . The system of  claim 13 , wherein the de-rating method is selected based on an extent of the damage to the first well completion segment. 
     
     
         15 . A non-transitory computer storage medium encoded with instructions that, when executed by one or more computers, cause the one or more computers to perform operations comprising:
 generating respective water injection hydraulic simulation models for a plurality of injection wells in a water injection network, the water injection network comprising a plurality of well completion segments;   generating, using the respective water injection hydraulic simulation models, respective simulated pressure profiles for the plurality of injection wells at one or more injection rates;   determining respective internal yield pressure limits for the plurality of well completion segments;   determining, based on the respective internal yield pressure limits and the respective simulated pressure profiles, a potential leak problem in the water injection network; and   performing a corrective action to resolve the potential leak problem.   
     
     
         16 . The system of  claim 15 , wherein generating the water injection hydraulic simulation model for the plurality of injection wells comprises:
 generating the water injection hydraulic simulation model for the plurality of injection wells using a steady-state multiphase flow simulation software.   
     
     
         17 . The system of  claim 15 , the operations further comprising:
 maintaining up-to-date versions of the respective water injection hydraulic simulation models based on real-time injection data.   
     
     
         18 . The system of  claim 15 , wherein the one or more injection rates comprise a plant baseline injection rate. 
     
     
         19 . The system of  claim 15 , wherein determining respective internal yield pressure limits for the plurality of well completion segments comprises:
 determining that a first well completion segment is damaged; and   responsively using a de-rating method to calculate a de-rated internal yield pressure value for the first well completion segment, wherein the de-rated internal yield pressure value is the respective internal yield pressure limit for the first well completion segment.   
     
     
         20 . The system of  claim 19 , wherein the de-rating method is one of: a Default Designating Method (DDM), a Simple De-rating Method (SDM), or an Explicit De-rating Method (EDM).