diff --git a/AsbCloudInfrastructure/Repository/WellOperationRepository.cs b/AsbCloudInfrastructure/Repository/WellOperationRepository.cs
index 8a389e74..2e4e956a 100644
--- a/AsbCloudInfrastructure/Repository/WellOperationRepository.cs
+++ b/AsbCloudInfrastructure/Repository/WellOperationRepository.cs
@@ -339,7 +339,7 @@ public class WellOperationRepository : IWellOperationRepository
         var firstOperation = wellOperationDtos
             .FirstOrDefault();
         if (firstOperation is null)
-            return Enumerable.Empty<ValidationResult>();
+            yield break;
 
         var request = new WellOperationRequest()
         {
@@ -353,7 +353,9 @@ public class WellOperationRepository : IWellOperationRepository
 
         var wellOperationsUnion = entities.Union(wellOperationDtos).OrderBy(o => o.DateStart);
 
-        return Validate(wellOperationsUnion);
+        var results = Validate(wellOperationsUnion);
+        foreach ( var result in results)
+            yield return result;
     }
 
     public IEnumerable<ValidationResult> Validate(IEnumerable<WellOperationDto> wellOperationDtos)
@@ -361,12 +363,10 @@ public class WellOperationRepository : IWellOperationRepository
         var firstOperation = wellOperationDtos
             .FirstOrDefault();
         if (firstOperation is null)
-            return Enumerable.Empty<ValidationResult>();
+            yield break;
 
-        var validationResults = new List<ValidationResult>();
-
-        var wellOperations = wellOperationDtos.ToArray();
-        for (var i = wellOperations.Count() - 1; i >= 1; i--)
+        var wellOperations = wellOperationDtos.OrderBy(o => o.DateStart).ToArray();
+        for (var i = 1; i < wellOperations.Length; i++)
         {
             var prevOperation = wellOperations[i - 1];
             var currentOperation = wellOperations[i];
@@ -378,20 +378,18 @@ public class WellOperationRepository : IWellOperationRepository
 
             if (prevOperationDateStart.AddDays(Gap) < currentOperationDateStart)
             {
-                validationResults.Add(new ValidationResult(
+                yield return new ValidationResult(
                        $"Разница дат между операциями не должна превышать 90 дней",
-                       new[] { nameof(wellOperations) }));
+                       new[] { nameof(wellOperations) });
             }
 
             if (prevOperationDateEnd > currentOperationDateStart)
             {
-                validationResults.Add(new ValidationResult(
+                yield return new ValidationResult(
                       $"Предыдущая операция не завершена",
-                      new[] { nameof(wellOperations) }));
+                      new[] { nameof(wellOperations) });
             }
         }
-
-        return validationResults;
     }
 
     /// <inheritdoc/>