Method for determining drain configurations of wells in a field

Abstract

The present invention relates to a method for determining drain configurations of wells in a field containing a hydrocarbon reservoir, said method comprising: receiving a first set of geological gridded models; receiving a set of criteria; estimating a plurality of weights, each weight being associated to a respective criterion among the plurality of criteria, based on a reference drain configuration comprised in the first received set of geological gridded models and the received set of criteria; receiving a second geological gridded model of the field; determining a drain configuration based on the received set of criteria and the plurality of estimated weights.

1 . A computer-implemented method for determining drain configurations of wells in a field containing a hydrocarbon reservoir, said method comprising:
 /a/ receiving a first set of geological gridded models,
 each gridded model among the first set of geological gridded models including a respective plurality of cells; 
 wherein each geological gridded model includes a drain associated with a reference drain configuration, said reference drain configuration including N respective cells within the respective plurality of cells; 
   /b/ receiving a set of criteria;   /c/ for each geological gridded model among the first set of geological gridded models:
 determining possible configurations for the N respective cells, 
 for each possible configuration among the possible configurations and for each cell among said N respective cells,
 computing criterion measures, each criterion measure representing a suitability to a respective criterion among the received set of criteria; and 
 determining, based on said criterion measures, a set of non-dominated configuration among said possible configurations via a non-dominated sorting algorithm for jointly optimizing the set of criteria; 
 
 determining a first configuration among the set of non-dominated configurations, said first configuration minimizing a distance between the reference drain configuration respectively associated to the geological gridded model and the set of non-dominated configurations; and 
 determining intermediate weights based on coordinates of the first configuration in a space defined by the set of criteria, each intermediate weight being associated to a respective criterion among the plurality of criteria; 
   /d/ estimating a plurality of weights, each weight being associated to a respective criterion among the plurality of criteria and estimated based on intermediate weights among the pluralities of intermediate weights associated to said respective criterion;   /e/ receiving a second geological gridded model of the field,
 the second geological gridded model including a plurality of cells, and including a second drain, said second drain including N 2  cells within the plurality of cells; and 
   /f/ determining a configuration for said N 2  cells based on the received set of criteria and the plurality of estimated weights.   
     
     
         2 . The method of  claim 1 , wherein /c/ comprises
 determining a plurality of intermediate weights w 1   k  corresponding to a weight w i  associated to a criterion M i  among the plurality of criteria, k being an integer between 1 and a number of reference drain configuration,   
       wherein /d/ comprises:
 estimating the weight w i  as a function of intermediate weights w i   k  among the plurality of intermediate weights. 
 
     
     
         3 . The method of  claim 1 , wherein, in /c/, the determining of the possible configurations comprises:
 receiving a first set of constraints depending on a type of operation at the drain.   
     
     
         4 . The method of  claim 1 , wherein the determining /f/ of the configuration comprises:
 determining possible configurations for said N 2  cells;   for each configuration among the possible configurations, computing criterion measures, each criterion measure representing a suitability to a respective criterion among the received set of criteria;   determining, based on said criterion measures, a second set of non-dominated configurations among said possible configurations via a non-dominated sorting algorithm for jointly optimizing the set of criteria; and   determining a configuration for said N 2  cells, based on said second set of non-dominated configurations and on the plurality of weights estimated.   
     
     
         5 . The method of  claim 4 , wherein, in /f/, the determining of the second group of configurations comprises:
 receiving a second set of constraints depending on a type of operation at the drain.   
     
     
         6 . The method of  claim 4 , wherein, in /f/, the determining of the configuration for said N 2  cells comprises:
 determining N S  points in the space defined by the set of criterion measures, wherein N S  is an integer, via a random sampling from a multidimensional distribution of the plurality of weights estimated;   determining, among the second set of non-dominated configurations, a configuration which minimizes a predefined proximity criterion to the N S  points determined; and   selecting said configuration as being the configuration for said N 2  cells.   
     
     
         7 . The method of  claim 1 , wherein the criterion measures include at least one measure among:
 an ability of the N 2  cells to flow from or into the drain-;   an ability of the N 2  cells to equalize a flow of the drain;   a likeliness of the N 2  cells to produce at the drain an undesired fluid at a rate;   a likeliness of the N 2  cells to determine a breakthrough of an injected fluid at distance of production wells at a rate;   a sum of the length of all blanked cells of the drain;   a number of splits of the drain; and   an ability of the N 2  cells to flow from or into the drain, function of a location of a considered cell of the N 2  cells in the drain.   
     
     
         8 . A computer-implemented method for determining drain configurations of wells in a field containing a hydrocarbon reservoir, said method comprising:
 receiving a geological gridded model of the field, the geological gridded model including a plurality of cells, and including a drain, said drain including N 2  cells within the plurality of cells;   receiving a set of criteria;   determining possible configurations for said N 2  cells;   for each configuration among the possible configurations, computing criterion measures, each criterion measure representing a suitability to a respective criterion among the received set of criteria;   determining, based on said criterion measures, a set of non-dominated configurations among said possible configurations via a non-dominated sorting algorithm for jointly optimizing the set of criteria; and   determining a configuration for said N 2  cells, based on said set of non-dominated configurations and on the plurality of weights estimated.   
     
     
         9 . A non-transitory computer readable storage medium, having stored thereon a computer program comprising program instructions, the computer program being loadable into a data-processing device and configured to cause the data-processing device to carry out the method of  claim 1  when the computer program is run by the data-processing device. 
     
     
         10 . A device for determining drain configurations of wells in a field containing a hydrocarbon reservoir, the device comprising:
 /a/ an interface for receiving a first set of geological gridded models,
 each gridded model among the first set of geological gridded models including a respective plurality of cells; 
 wherein each geological gridded model includes a drain associated with a reference drain configuration, said reference drain configuration including N respective cells within the respective plurality of cells; 
   /b/ an interface for receiving a set of criteria;   /c/ for each geological gridded model among the first set of geological gridded models:
 a circuit for determining possible configurations for the N respective cells, 
 for each possible configuration among the possible configurations and for each cell among said N respective cells,
 a circuit for computing criterion measures, each criterion measure representing a suitability to a respective criterion among the received set of criteria; and 
 a circuit for determining, based on said criterion measures, a set of non-dominated configuration among said possible configurations via a non-dominated sorting algorithm for jointly optimizing the set of criteria; 
 
 a circuit for determining a first configuration among the set of non-dominated configurations, said first configuration minimizing a distance between the reference drain configuration respectively associated to the geological gridded model and the set of non-dominated configurations; and 
 a circuit for determining intermediate weights based on coordinates of the first configuration in a space defined by the set of criteria, each intermediate weight being associated to a respective criterion among the plurality of criteria; 
   /d/ a circuit for estimating a plurality of weights, each weight being associated to a respective criterion among the plurality of criteria and estimated based on intermediate weights among the pluralities of intermediate weights associated to said respective criterion;   /e/ an interface for receiving a second geological gridded model of the field,
 the second geological gridded model including a plurality of cells, and including a second drain, said second drain comprising N 2  cells within the plurality of cells; and 
   /f/ a circuit for determining a configuration for said N 2  cells based on the received set of criteria and the plurality of estimated weights.   
     
     
         11 . A device for determining drain configurations of wells in a field containing a hydrocarbon reservoir, the device comprising:
 an interface for receiving a geological gridded model of the field, the geological gridded model including a plurality of cells, and including a drain, said drain comprising N 2  cells within the plurality of cells;   an interface for receiving a set of criteria;   a circuit for determining possible configurations for said N 2  cells;   for each configuration among the possible configurations, a circuit for computing criterion measures, each criterion measure representing a suitability to a respective criterion among the received set of criteria;   a circuit for determining, based on said criterion measures, a set of non-dominated configurations among said possible configurations via a non-dominated sorting algorithm for jointly optimizing the set of criteria; and   a circuit for determining a configuration for said N 2  cells, based on said set of non-dominated configurations and on the plurality of weights estimated.