diff --git a/opm/core/WellsGroup.cpp b/opm/core/WellsGroup.cpp
index 7b56e8cab..b145793d4 100644
--- a/opm/core/WellsGroup.cpp
+++ b/opm/core/WellsGroup.cpp
@@ -528,7 +528,21 @@ namespace Opm
         return sum;
     }
 
+    /// Gets the total production flow of the given phase. 
+    /// \param[in] phase_flows      A vector containing rates by phase for each well.
+    ///                             Is assumed to be ordered the same way as the related Wells-struct,
+    ///                             with all phase rates of a single well adjacent in the array.
+    /// \param[in] phase            The phase for which to sum up.
 
+    double WellsGroup::getTotalProductionFlow(const std::vector<double>& phase_flows,
+                                             const BlackoilPhases::PhaseIndex phase)
+    {
+        double sum = 0.0;
+        for (size_t i = 0; i < children_.size(); ++i) {
+            sum += children_[i]->getTotalProductionFlow(phase_flows, phase);
+        }
+        return sum;
+    }
 
     // ==============    WellNode members   ============
 
@@ -728,6 +742,25 @@ namespace Opm
     }
 
 
+    /// Gets the total production flow of the given phase. 
+    /// \param[in] phase_flows      A vector containing rates by phase for each well.
+    ///                             Is assumed to be ordered the same way as the related Wells-struct,
+    ///                             with all phase rates of a single well adjacent in the array.
+    /// \param[in] phase            The phase for which to sum up.
+
+    double WellNode::getTotalProductionFlow(const std::vector<double>& phase_flows,
+                                            const BlackoilPhases::PhaseIndex phase)
+    {
+        if (type() == INJECTOR) {
+            return 0.0;
+        }
+        return phase_flows[self_index_*phaseUsage().num_phases + phaseUsage().phase_pos[phase]];
+    }
+    
+    WellType WellNode::type() const {
+        return wells_->type[self_index_];
+    }
+
     void WellNode::applyProdGroupControl(const ProductionSpecification::ControlMode control_mode,
                                          const double target,
                                          const bool forced)
diff --git a/opm/core/WellsGroup.hpp b/opm/core/WellsGroup.hpp
index 6fe5508bc..d1b98aeda 100644
--- a/opm/core/WellsGroup.hpp
+++ b/opm/core/WellsGroup.hpp
@@ -179,6 +179,15 @@ namespace Opm
         ///                       wells under group control
         virtual double injectionGuideRate(bool only_group) = 0;
         
+        /// Gets the total production flow of the given phase. 
+        /// \param[in] phase_flows      A vector containing rates by phase for each well.
+        ///                             Is assumed to be ordered the same way as the related Wells-struct,
+        ///                             with all phase rates of a single well adjacent in the array.
+        /// \param[in] phase            The phase for which to sum up.
+        virtual double getTotalProductionFlow(const std::vector<double>& phase_flows,
+                                              const BlackoilPhases::PhaseIndex phase) = 0;
+        
+        
     protected:
         /// Calculates the correct rate for the given ProductionSpecification::ControlMode
         double rateByMode(const double* res_rates, 
@@ -258,6 +267,14 @@ namespace Opm
         /// \param[in] only_group If true, will only accumelate guide rates for 
         ///                       wells under group control
         virtual double injectionGuideRate(bool only_group);
+        
+        /// Gets the total production flow of the given phase. 
+        /// \param[in] phase_flows      A vector containing rates by phase for each well.
+        ///                             Is assumed to be ordered the same way as the related Wells-struct,
+        ///                             with all phase rates of a single well adjacent in the array.
+        /// \param[in] phase            The phase for which to sum up.
+        virtual double getTotalProductionFlow(const std::vector<double>& phase_flows,
+                                              const BlackoilPhases::PhaseIndex phase);
 
     private:
         std::vector<std::tr1::shared_ptr<WellsGroupInterface> > children_;
@@ -327,6 +344,17 @@ namespace Opm
         /// \param[in] only_group If true, will only accumelate guide rates for 
         ///                       wells under group control
         virtual double injectionGuideRate(bool only_group);
+        
+        /// Gets the total production flow of the given phase. 
+        /// \param[in] phase_flows      A vector containing rates by phase for each well.
+        ///                             Is assumed to be ordered the same way as the related Wells-struct,
+        ///                             with all phase rates of a single well adjacent in the array.
+        /// \param[in] phase            The phase for which to sum up.
+        virtual double getTotalProductionFlow(const std::vector<double>& phase_flows,
+                                              const BlackoilPhases::PhaseIndex phase);
+
+        /// Returns the type of the well.
+        WellType type() const;
 
     private:
         Wells* wells_;