Ошибка: "adoquery1.field 'id_work' not found"

var nah:string;
begin
 nah:=form4.ADOQuery4.Fields[0].AsString;
 form4.ADOQuery4.Active:=false;
 form4.ADOQuery4.SQL.Clear;
 form4.ADOQuery4.SQL.Add('SELECT rasxod_mat.*');
 form4.ADOQuery4.SQL.Add('FROM work_con INNER JOIN rasxod_mat ON work_con.id_work:=rasxod_mat.id_work');
 form4.ADOQuery4.SQL.Add('WHERE(rasxod_mat.id_work='+nah+');');
 form4.ADOQuery4.Active:=true;
 end;

ADOQueryMaster.SQL.text:='SELECT rasxod_mat.* FROM work_con '+
                                  'INNER JOIN rasxod_mat ON work_con.id_work=rasxod_mat.id_work'+
                                  'WHERE(rasxod_mat.id_work=:id_work';

ADOQueryMaster.Close;
ADOQueryMaster.parameters.paramByName('id_work').value := 12345;
ADOQueryMaster.Open;

ADOQueryDetail.Close;
ADOQueryDetail.parameters.paramByName('имяпараметра').value := значениедлявыборанужныхзаписей;
ADOQueryDetail.Open;

procedure TForm8.ADODataSet1AfterScroll(DataSet: TDataSet);
begin
form8.ADOQuery2.Close;
form8.ADOQuery2.Parameters.ParamByName('id_work').Value:=(DBGrid1.Columns.Items[0].field.asstring);
form8.ADOQuery2.Open;
end;
 
procedure TForm8.DBGrid1CellClick(Column: TColumn);
begin
form8.ADOQuery1.SQL.Text:='SELECT rasxod_mat.* FROM work_con '+
                           'INNER JOIN rasxod_mat ON work_con.id_work=rasxod_mat.id_work'+
                              'WHERE(rasxod_mat.id_work=:work_con.id_work';
form8.ADOQuery1.Close;
form8.ADOQuery1.Parameters.ParamByName('id_work').Value:=(DBGrid1.Columns.Items[0].field.asstring);
form8.ADOQuery1.Open;