diff --git a/AsbCloudApp/Data/WellDto.cs b/AsbCloudApp/Data/WellDto.cs
index d9a67431..368e58c9 100644
--- a/AsbCloudApp/Data/WellDto.cs
+++ b/AsbCloudApp/Data/WellDto.cs
@@ -67,7 +67,7 @@ namespace AsbCloudApp.Data
         /// <summary>
         /// Дата/время первой операции
         /// </summary>
-        public DateTime? StartDate { get; set; }
+        public DateTimeOffset? StartDate { get; set; }
 
         /// <summary>
         /// Дата/время кода приходили данные последний раз
diff --git a/AsbCloudInfrastructure/Services/WellService.cs b/AsbCloudInfrastructure/Services/WellService.cs
index 2c579140..ac457347 100644
--- a/AsbCloudInfrastructure/Services/WellService.cs
+++ b/AsbCloudInfrastructure/Services/WellService.cs
@@ -273,7 +273,7 @@ namespace AsbCloudInfrastructure.Services
             if (entity.Timezone is null)
                 dto.Timezone = GetTimezone(entity.Id);
 
-            dto.StartDate = wellOperationRepository.FirstOperationDate(entity.Id)?.ToRemoteDateTime(dto.Timezone.Hours);
+            dto.StartDate = wellOperationRepository.FirstOperationDate(entity.Id)?.ToOffset(TimeSpan.FromHours(dto.Timezone.Hours));
             dto.WellType = entity.WellType.Caption;
             dto.Cluster = entity.Cluster.Caption;
             dto.Deposit = entity.Cluster.Deposit.Caption;