diff --git a/AsbCloudApp/Data/StatWellDto.cs b/AsbCloudApp/Data/StatWellDto.cs
index 9793e858..1b8ecbeb 100644
--- a/AsbCloudApp/Data/StatWellDto.cs
+++ b/AsbCloudApp/Data/StatWellDto.cs
@@ -51,5 +51,10 @@ namespace AsbCloudApp.Data
         /// компании участвующие в строительстве скважины
         /// </summary>
         public IEnumerable<CompanyDto> Companies { get; set; } = Enumerable.Empty<CompanyDto>();
+
+        /// <summary>
+        /// Отставание от ГГД, дней
+        /// </summary>
+        public double TvdLagDays { get; set; } = 0;
     }
 }
diff --git a/AsbCloudInfrastructure/Services/WellInfoService.cs b/AsbCloudInfrastructure/Services/WellInfoService.cs
index 9b6986bf..d627dc4e 100644
--- a/AsbCloudInfrastructure/Services/WellInfoService.cs
+++ b/AsbCloudInfrastructure/Services/WellInfoService.cs
@@ -88,7 +88,6 @@ namespace AsbCloudInfrastructure.Services
             WellMapInfo = activeWells.Select(well => {
                 var wellMapInfo = well.Adapt<WellMapInfoWithComanies>();
 
-                // From teltemetryTracker
                 var wellLastTelemetryInfo = lastTelemetryInfo.FirstOrDefault(t => t.IdTelemetry == well.IdTelemetry);
 
                 var wellOperationsStat = operationsStat.FirstOrDefault(s => s.Id == well.Id);
@@ -138,7 +137,7 @@ namespace AsbCloudInfrastructure.Services
 
                 wellMapInfo.SaubUsage = wellSubsystemStat?.SubsystemAKB?.KUsage ?? 0d;
                 wellMapInfo.SpinUsage = wellSubsystemStat?.SubsystemSpinMaster?.KUsage ?? 0d;
-                wellMapInfo.TvdLagPercent = 0;// From WellOperationService?
+                wellMapInfo.TvdLagPercent = wellOperationsStat?.TvdLagDays ?? 0d;
                 wellMapInfo.IdsCompanies = well.Companies.Select(c => c.Id);
                 return wellMapInfo;
             }).ToArray();
diff --git a/AsbCloudInfrastructure/Services/WellOperationService/OperationsStatService.cs b/AsbCloudInfrastructure/Services/WellOperationService/OperationsStatService.cs
index a360a014..f783967e 100644
--- a/AsbCloudInfrastructure/Services/WellOperationService/OperationsStatService.cs
+++ b/AsbCloudInfrastructure/Services/WellOperationService/OperationsStatService.cs
@@ -7,6 +7,7 @@ using Microsoft.Extensions.Caching.Memory;
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Numerics;
 using System.Threading;
 using System.Threading.Tasks;
 
@@ -158,10 +159,39 @@ namespace AsbCloudInfrastructure.Services.WellOperationService
             var timezoneOffsetH = wellService.GetTimezone(well.Id).Hours;
             statWellDto.Sections = CalcSectionsStats(wellOperations, timezoneOffsetH);
             statWellDto.Total = GetStatTotal(wellOperations, well.IdState, timezoneOffsetH);
+            statWellDto.TvdLagDays = CalcTvdLagDays(wellOperations);
 
             return statWellDto;
         }
 
+        private double CalcTvdLagDays(IOrderedEnumerable<WellOperation> wellOperations)
+        {
+            var operationsOrdered = wellOperations
+                .OrderBy(o => o.DateStart);
+
+            var factOperations = operationsOrdered
+                .Where(o => o.IdType == WellOperation.IdOperationTypeFact);
+
+            var lastCorrespondingFactOperation = factOperations
+                .LastOrDefault(o => o.IdPlan is not null);
+            
+            if (lastCorrespondingFactOperation is null)
+                return 0d;
+
+            var lastFactOperation = factOperations.LastOrDefault();
+
+            var remainingPlanOperations = operationsOrdered
+                .Where(o => o.IdType == WellOperation.IdOperationTypePlan)
+                .Where(o => o.DateStart > lastCorrespondingFactOperation.OperationPlan.DateStart);
+
+            var durationRemain = remainingPlanOperations.Sum(o => o.DurationHours);
+            var factEnd = lastFactOperation.DateStart.AddHours(durationRemain + lastFactOperation.DurationHours);
+            var planEnd = lastCorrespondingFactOperation.DateStart.AddHours(durationRemain + lastCorrespondingFactOperation.DurationHours);
+            var lagDays = (planEnd - factEnd).TotalDays;
+
+            return lagDays;
+        }
+
         private IEnumerable<StatSectionDto> CalcSectionsStats(IEnumerable<WellOperation> operations, double timezoneOffsetH)
         {
             var sectionTypeIds = operations