diff --git a/AsbCloudInfrastructure/Repository/QueryContainer.cs b/AsbCloudInfrastructure/Repository/QueryContainer.cs
index a1586220..80838c31 100644
--- a/AsbCloudInfrastructure/Repository/QueryContainer.cs
+++ b/AsbCloudInfrastructure/Repository/QueryContainer.cs
@@ -5,6 +5,7 @@ using System.Linq;
 
 namespace AsbCloudInfrastructure.Repository
 {
+#nullable enable
     public class QueryContainer<TEntity> where TEntity : class, IId
     {
         protected readonly IAsbCloudDbContext dbContext;
@@ -25,4 +26,5 @@ namespace AsbCloudInfrastructure.Repository
             GetQuery = () => makeQuery(dbSet);
         }
     }
+#nullable disable
 }
\ No newline at end of file
diff --git a/AsbCloudInfrastructure/Repository/SetpointsRequestRepository.cs b/AsbCloudInfrastructure/Repository/SetpointsRequestRepository.cs
index 844ebcfe..38c00559 100644
--- a/AsbCloudInfrastructure/Repository/SetpointsRequestRepository.cs
+++ b/AsbCloudInfrastructure/Repository/SetpointsRequestRepository.cs
@@ -11,6 +11,7 @@ using System.Linq;
 
 namespace AsbCloudInfrastructure.Repository
 {
+#nullable enable
     public class SetpointsRequestRepository : CrudWellRelatedCacheRepositoryBase<SetpointsRequestDto, SetpointsRequest>
     {
         private readonly IWellService wellService;
@@ -61,4 +62,5 @@ namespace AsbCloudInfrastructure.Repository
             return result;
         }
     }
+#nullable disable
 }
diff --git a/AsbCloudInfrastructure/Repository/WitsRecordRepository.cs b/AsbCloudInfrastructure/Repository/WitsRecordRepository.cs
index 35c2fabb..eeac93d9 100644
--- a/AsbCloudInfrastructure/Repository/WitsRecordRepository.cs
+++ b/AsbCloudInfrastructure/Repository/WitsRecordRepository.cs
@@ -11,6 +11,7 @@ using System.Threading.Tasks;
 
 namespace AsbCloudInfrastructure.Repository
 {
+#nullable enable
     public class WitsRecordRepository<TDto, TEntity> : IWitsRecordRepository<TDto>
         where TEntity : AsbCloudDb.Model.WITS.RecordBase, ITelemetryData
         where TDto : AsbCloudApp.Data.ITelemetryData
@@ -53,7 +54,9 @@ namespace AsbCloudInfrastructure.Repository
                 .Where(d => d.DateTime <= end)
                 .AsNoTracking();
             var data = await query.ToListAsync(token);
-            return data.Select(d => Convert(d, timezoneHours));
+            return data
+                .Where(d => d is not null)
+                .Select(d => Convert(d, timezoneHours));
         }
 
         public async Task<IEnumerable<TDto>> GetLastAsync(int idTelemetry, CancellationToken token)
@@ -64,7 +67,10 @@ namespace AsbCloudInfrastructure.Repository
                 .OrderBy(d => d.DateTime)
                 .AsNoTracking();
             var data = await query.LastOrDefaultAsync(token);
-            return new TDto[] { Convert(data, timezoneHours) };
+            if(data is not null)
+                return new TDto[] { Convert(data, timezoneHours) };
+
+            return new TDto[] { };
         }
 
         public async Task SaveDataAsync(int idTelemetry, IEnumerable<TDto> dtos, CancellationToken token)
@@ -75,6 +81,7 @@ namespace AsbCloudInfrastructure.Repository
             var timezoneHours = telemetryService.GetTimezone(idTelemetry).Hours;
             var entities = dtos
                 .DistinctBy(d => d.DateTime)
+                .Where(dto => dto is not null)
                 .Select(dto => Convert(dto, idTelemetry, timezoneHours));
 
             var dateMin = entities.Min(e => e.DateTime);
@@ -128,9 +135,6 @@ namespace AsbCloudInfrastructure.Repository
 
         private static TEntity Convert(TDto dto, int idTelemetry, double timezoneHours)
         {
-            if (dto is null)
-                return null;
-
             var entity = dto.Adapt<TEntity>();
             entity.Recid = GetRecId(dto);
             entity.IdTelemetry = idTelemetry;            
@@ -140,13 +144,11 @@ namespace AsbCloudInfrastructure.Repository
 
         private static TDto Convert(TEntity entity, double timezoneHours)
         {
-            if (entity is null)
-                return default;
-
             var data = entity.Adapt<TDto>();
             data.DateTime = entity.DateTime.ToRemoteDateTime(timezoneHours);
             return data;
         }
 
     }
+#nullable disable
 }
diff --git a/AsbCloudInfrastructure/Services/DailyReport/BlockAbstract.cs b/AsbCloudInfrastructure/Services/DailyReport/BlockAbstract.cs
index cebcb11f..5814914f 100644
--- a/AsbCloudInfrastructure/Services/DailyReport/BlockAbstract.cs
+++ b/AsbCloudInfrastructure/Services/DailyReport/BlockAbstract.cs
@@ -2,10 +2,12 @@
 
 namespace AsbCloudInfrastructure.Services.DailyReport
 {
+#nullable enable
     abstract class BlockAbstract
     {
         public abstract CellAddress AddressBlockBegin { get; }
         public abstract CellAddress AddressBlockEnd { get; }
         public abstract void Draw(IXLWorksheet sheet);
     }
+#nullable disable
 }
diff --git a/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/BhaBlock.cs b/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/BhaBlock.cs
index cd859b00..f38e498e 100644
--- a/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/BhaBlock.cs
+++ b/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/BhaBlock.cs
@@ -3,6 +3,7 @@ using ClosedXML.Excel;
 
 namespace AsbCloudInfrastructure.Services.DailyReport.DailyReportBlocks
 {
+#nullable enable
     class BhaBlock : BlockAbstract
     {
         private readonly BhaDto blockDto;
@@ -110,7 +111,8 @@ namespace AsbCloudInfrastructure.Services.DailyReport.DailyReportBlocks
                 .SetFormulaA1($"{FormulaBhaBlock(AddressDurationDataStart[4], AddressDurationDataFinish[4])}").Style.SetAllBorders();
         }
     }
+#nullable disable
 }
-        
+
 
 
diff --git a/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/DimensionlessBlock.cs b/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/DimensionlessBlock.cs
index f10c046e..28318820 100644
--- a/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/DimensionlessBlock.cs
+++ b/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/DimensionlessBlock.cs
@@ -3,12 +3,12 @@ using ClosedXML.Excel;
 
 namespace AsbCloudInfrastructure.Services.DailyReport.DailyReportBlocks
 {
-
+#nullable enable
     internal class DimensionlessBlock : BlockAbstract
     {
         private readonly NoDrillingDto blockDto;
 
-        public SaubBlock SaubBlock { get; set; }
+        public SaubBlock SaubBlock { get; set; } = null!;
 
         public CellAddress AddressDimensionTitle { get; }
         public CellAddress AddressPreparationTitle { get; }
@@ -19,7 +19,7 @@ namespace AsbCloudInfrastructure.Services.DailyReport.DailyReportBlocks
         public CellAddress[] AddressPreparationValue { get; }
         public CellAddress[] AddressExtensionHead { get; }
         public CellAddress[] AddressExtensionValue { get; }
-        public CellAddress AddressBlockFormula { get; }
+        public CellAddress AddressBlockFormula { get; } = null!;
         public override CellAddress AddressBlockBegin { get; }
         public override CellAddress AddressBlockEnd { get; }
         public DimensionlessBlock(CellAddress addressBlockBegin, NoDrillingDto blockDto)
@@ -114,6 +114,6 @@ namespace AsbCloudInfrastructure.Services.DailyReport.DailyReportBlocks
                 ._SetValue("Наращивание");
         }
     }
-
+#nullable disable
 }
 
diff --git a/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/HeadBlock.cs b/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/HeadBlock.cs
index 2acc1160..a306413f 100644
--- a/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/HeadBlock.cs
+++ b/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/HeadBlock.cs
@@ -3,7 +3,7 @@ using ClosedXML.Excel;
 
 namespace AsbCloudInfrastructure.Services.DailyReport.DailyReportBlocks
 {
-
+#nullable enable
     class HeadBlock : BlockAbstract
     {
         private readonly HeadDto blockDto;
@@ -175,6 +175,7 @@ namespace AsbCloudInfrastructure.Services.DailyReport.DailyReportBlocks
                 ._SetValue($"{blockDto.CountLaunchesMSE}");
         }
     }
+#nullable disable
 }
 
 
diff --git a/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/SaubBlock.cs b/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/SaubBlock.cs
index 84ad001a..2f3b0588 100644
--- a/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/SaubBlock.cs
+++ b/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/SaubBlock.cs
@@ -3,6 +3,7 @@ using ClosedXML.Excel;
 
 namespace AsbCloudInfrastructure.Services.DailyReport.DailyReportBlocks
 {
+#nullable enable
     internal class SaubBlock : BlockAbstract
     {
         private readonly SaubDto blockDto;
@@ -224,5 +225,6 @@ namespace AsbCloudInfrastructure.Services.DailyReport.DailyReportBlocks
                  ._SetValue($"Примечание: {blockDto.DeclinesReasonsROP}");
         }
     }
+#nullable disable
 }
 
diff --git a/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/SignBlock.cs b/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/SignBlock.cs
index b4fd4e8f..4461b9d4 100644
--- a/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/SignBlock.cs
+++ b/AsbCloudInfrastructure/Services/DailyReport/DailyReportBlocks/SignBlock.cs
@@ -3,6 +3,7 @@ using ClosedXML.Excel;
 
 namespace AsbCloudInfrastructure.Services.DailyReport.DailyReportBlocks
 {
+#nullable enable
     internal class SignBlock : BlockAbstract
     {
         private readonly SignDto blockDto;
@@ -10,7 +11,6 @@ namespace AsbCloudInfrastructure.Services.DailyReport.DailyReportBlocks
         public CellAddress AddressDrillMaster { get; }
         public CellAddress AddressSupervisorHead { get; }
         public CellAddress AddressSupervisor { get; }
-        public CellAddress[] AddressPeriodTableDataArray { get; }        
         public override CellAddress AddressBlockBegin { get; }        
         public override CellAddress AddressBlockEnd { get; }
 
@@ -45,7 +45,7 @@ namespace AsbCloudInfrastructure.Services.DailyReport.DailyReportBlocks
                .SetValue($"{blockDto.Supervisor}");
         }
     }
-
+#nullable disable
 }
 
 
diff --git a/AsbCloudInfrastructure/Services/DailyReport/DailyReportMakerExcel.cs b/AsbCloudInfrastructure/Services/DailyReport/DailyReportMakerExcel.cs
index 201b1341..500c260a 100644
--- a/AsbCloudInfrastructure/Services/DailyReport/DailyReportMakerExcel.cs
+++ b/AsbCloudInfrastructure/Services/DailyReport/DailyReportMakerExcel.cs
@@ -6,9 +6,10 @@ using System.Collections.Generic;
 using System.IO;
 namespace AsbCloudInfrastructure.Services.DailyReport
 {
+#nullable enable
     public class DailyReportMakerExcel
     {
-        private IEnumerable<WellOperationCategoryDto> OperationCategories;
+        private IEnumerable<WellOperationCategoryDto> OperationCategories = null!;
 
         public Stream MakeReportFromBlocks(DailyReportDto dto, IEnumerable<WellOperationCategoryDto> operationCategories)
         {
@@ -55,5 +56,6 @@ namespace AsbCloudInfrastructure.Services.DailyReport
             sheet.Rows().AdjustToContents();
         }
     }
+#nullable disable
 }
 
diff --git a/AsbCloudInfrastructure/Services/DailyReport/XLExtentions.cs b/AsbCloudInfrastructure/Services/DailyReport/XLExtentions.cs
index 5297b0e1..23f902a7 100644
--- a/AsbCloudInfrastructure/Services/DailyReport/XLExtentions.cs
+++ b/AsbCloudInfrastructure/Services/DailyReport/XLExtentions.cs
@@ -3,6 +3,7 @@ using System;
 
 namespace AsbCloudInfrastructure.Services.DailyReport
 {
+#nullable enable
     internal static class XLExtentions
     {
         public static IXLRange _SetValue(this IXLRange range, object value)
@@ -156,4 +157,5 @@ namespace AsbCloudInfrastructure.Services.DailyReport
             => sheet.Range(begin.RowNumber, begin.ColumnNumber, end.RowNumber, end.ColumnNumber);
         
     }
+#nullable disable
 }
diff --git a/AsbCloudInfrastructure/Services/DetectOperations/DetectableTelemetry.cs b/AsbCloudInfrastructure/Services/DetectOperations/DetectableTelemetry.cs
index 1ed08c7a..87f3defe 100644
--- a/AsbCloudInfrastructure/Services/DetectOperations/DetectableTelemetry.cs
+++ b/AsbCloudInfrastructure/Services/DetectOperations/DetectableTelemetry.cs
@@ -2,6 +2,7 @@
 
 namespace AsbCloudInfrastructure.Services.DetectOperations
 {
+#nullable enable
     public class DetectableTelemetry
     {
         public DateTimeOffset DateTime { get; set; }
@@ -13,4 +14,5 @@ namespace AsbCloudInfrastructure.Services.DetectOperations
         public float BitDepth { get; set; }
         public float RotorSpeed { get; set; }
     }
+#nullable disable
 }
diff --git a/AsbCloudInfrastructure/Services/DetectOperations/DetectedOperationExportService.cs b/AsbCloudInfrastructure/Services/DetectOperations/DetectedOperationExportService.cs
index ffca6b9f..c261e87d 100644
--- a/AsbCloudInfrastructure/Services/DetectOperations/DetectedOperationExportService.cs
+++ b/AsbCloudInfrastructure/Services/DetectOperations/DetectedOperationExportService.cs
@@ -12,6 +12,7 @@ using System.Threading.Tasks;
 
 namespace AsbCloudInfrastructure.Services.DetectOperations
 {
+#nullable enable
     internal class DetectedOperationExportService
     {
         private readonly IAsbCloudDbContext db;
@@ -41,7 +42,8 @@ namespace AsbCloudInfrastructure.Services.DetectOperations
                 return;
 
             var wells = idsWells.Select(i => wellService.GetOrDefault(i))
-                .Where(w => w is not null && w.IdTelemetry is not null);
+                .Where(w => w is not null && w.IdTelemetry is not null)
+                .Select(w => w!);
 
             if (!wells.Any())
                 return;
@@ -114,4 +116,5 @@ namespace AsbCloudInfrastructure.Services.DetectOperations
             sheet.Cell(rowNumber, 6).Value = operation.Value;
         }
     }
+#nullable enable
 }
diff --git a/AsbCloudInfrastructure/Services/DetectOperations/Detectors/OperationDetectorResult.cs b/AsbCloudInfrastructure/Services/DetectOperations/Detectors/OperationDetectorResult.cs
index f0391b4f..94ee7fc7 100644
--- a/AsbCloudInfrastructure/Services/DetectOperations/Detectors/OperationDetectorResult.cs
+++ b/AsbCloudInfrastructure/Services/DetectOperations/Detectors/OperationDetectorResult.cs
@@ -2,10 +2,12 @@
 
 namespace AsbCloudInfrastructure.Services.DetectOperations.Detectors
 {
+#nullable enable
     class OperationDetectorResult
     {
         public int TelemetryBegin { get; set; }
         public int TelemetryEnd { get; set; }
-        public DetectedOperation Operation { get; set; }
+        public DetectedOperation Operation { get; set; } = null!;
     }
+#nullable enable
 }
diff --git a/AsbCloudInfrastructure/Services/DetectOperations/InterpolationLine.cs b/AsbCloudInfrastructure/Services/DetectOperations/InterpolationLine.cs
index 1dc99547..cc49c079 100644
--- a/AsbCloudInfrastructure/Services/DetectOperations/InterpolationLine.cs
+++ b/AsbCloudInfrastructure/Services/DetectOperations/InterpolationLine.cs
@@ -2,6 +2,7 @@
 
 namespace AsbCloudInfrastructure.Services.DetectOperations
 {
+#nullable enable
     public class InterpolationLine
     {
         private readonly double xSum;
@@ -52,4 +53,5 @@ namespace AsbCloudInfrastructure.Services.DetectOperations
         public bool IsAverageYGreaterThan(double bound) =>
                 (ySum / count) >= bound;
     }
+#nullable disable
 }
diff --git a/AsbCloudInfrastructure/Services/DrillingProgram/DrillingProgramMaker.cs b/AsbCloudInfrastructure/Services/DrillingProgram/DrillingProgramMaker.cs
index dae5ff4f..032895c9 100644
--- a/AsbCloudInfrastructure/Services/DrillingProgram/DrillingProgramMaker.cs
+++ b/AsbCloudInfrastructure/Services/DrillingProgram/DrillingProgramMaker.cs
@@ -6,6 +6,7 @@ using System.Linq;
 
 namespace AsbCloudInfrastructure.Services.DrillingProgram
 {
+#nullable enable
     internal class DrillingProgramMaker
     {
         private const int maxAllowedColumns = 256;
@@ -15,7 +16,9 @@ namespace AsbCloudInfrastructure.Services.DrillingProgram
             var resultExcelFile = new XLWorkbook(XLEventTracking.Disabled);
             
             var titleSheet = resultExcelFile.AddWorksheet("Титульный лист");
-            var marks = parts.SelectMany(p => p.File.FileMarks);
+            var marks = parts
+                .Where(p => p.File is not null)
+                .SelectMany(p => p.File!.FileMarks);
             var titleSheetMaker = new TitleListSheet(marks, well);
             titleSheetMaker.Draw(titleSheet);
 
@@ -128,4 +131,5 @@ namespace AsbCloudInfrastructure.Services.DrillingProgram
             return rngData;
         }
     }
+#nullable disable
 }
diff --git a/AsbCloudInfrastructure/Services/DrillingProgram/ImageInfo.cs b/AsbCloudInfrastructure/Services/DrillingProgram/ImageInfo.cs
index 8f9265f9..aeedd213 100644
--- a/AsbCloudInfrastructure/Services/DrillingProgram/ImageInfo.cs
+++ b/AsbCloudInfrastructure/Services/DrillingProgram/ImageInfo.cs
@@ -2,14 +2,16 @@
 
 namespace AsbCloudInfrastructure.Services.DrillingProgram
 {
+#nullable enable
     class ImageInfo
     {
         public int Id { get; set; }
-        public byte[] Data { get; set; }
+        public byte[] Data { get; set; } = null!;
         public int Height { get; set; }
         public int Width { get; set; }
-        public IXLAddress TopLeftCellAddress { get; set; }
+        public IXLAddress TopLeftCellAddress { get; set; } = null!;
         public int Left { get; set; }
         public int Top { get; set; }
     }
+#nullable disable
 }
\ No newline at end of file