SINGAPORE, Sept 3 (Reuters) - Asian gasoil prices remained supported on Monday as spot demand emerged from Sri Lanka and the Philippines, traders said.     Gasoil cracks slipped by 14 cents to $19.91 a barrel while September prices increased more than October gasoil prices in the derivatives market.      Sri Lanka's Ceylon Petroleum Corp. is seeking 300,000 barrels of gasoil for delivery in mid-September, after the country's sole oil refinery shut on Saturday following damage to a floating pipeline at the Colombo port.  
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  MDIS/TENDA
       The import requirements are likely to make up a possible supply shortfall during the shutdown, which is expected to last a few days.     But the shutdown is unlikely to have a big impact on the gasoil market as Sri Lanka's overall demand for gasoil is down due to the monsoon season, traders said.     The company has also bought a gasoil and gasoline combination cargo from a little-known Indonesian company called Bumi Siak for the first time.      It paid a premium of $5.10 a barrel above Singapore quotes, for the gasoil portion of the cargo which made up 30,000 barrels.      Traders were surprised at Bumi Siak's sale as Indonesia is a net importer of gasoil and gasoline.      Diesel demand also emerged from the Philippines, with Petron seeking a cargo for early October delivery. Demand for transport fuel in the Philippines has been higher on the back of a growing economy.  
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       In the jet fuel market, more supply was seen out of Yemen, with the country's Aden Refinery offering its second cargo since it resumed production last month, after a nine-month halt.  
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        * TENDERS: Ceypetco is seeking 300,000 barrels of 0.25 percent sulphur gasoil for Sept. 19 delivery. The tender closes on Sept. 4 and is valid until Sept. 7.     - Petron is seeking 250,000 barrels of 500 ppm sulphur diesel for Oct. 1-3 delivery. The tender closes on Sept. 4, with same-day validity.     - Yemen has offered 30,000 tonnes of jet fuel for Sept. 23-25 loading. The tender closes on Sept. 4 and is valid until Sept. 5.          * CASH DEALS: No trades reported.           MID-DISTILLATES                                                                     CASH ($/T)          ASIA CLOSE       Change   % Change   Prev      RIC                                                           Close       Spot Gas Oil 0.5%            133.60     1.11       0.84    132.49   
  GO-SIN
    GO 0.5 Diff                    1.58     0.00       0.00      1.58   
  GO-SIN-DIF
    Spot Gas Oil 0.25%           134.27     1.12       0.84    133.15   
  GO25-SIN
    GO 0.25 Diff                   2.25     0.00       0.00      2.25   
  GO25-SIN-DIF
    Spot Gas Oil 0.05%           134.82     1.12       0.84    133.70   
  GO005-SIN
    GO 0.05 Diff                   2.80     0.00       0.00      2.80   
  GO005-SIN-DIF
    Spot Gas Oil                 135.82     1.12       0.83    134.70   
  GO10-SIN
    0.001%                                                               GO 0.001 Diff                  3.80     0.00       0.00      3.80   
  GO10-SIN-DIF
    Spot Jet/Kero                134.46     1.13       0.85    133.33   
  JET-SIN
    Jet/Kero Diff                  1.21     0.00       0.00      1.21   
  JET-SIN-DIF
                                                                                        SWAPS  ($/T)        ASIA CLOSE       Change   % Change   Prev      PM (1130 GMT)                      (0830 GMT)                           Close       Brent M1                     114.55     1.32       1.17    113.23   
  BRENTSGMc1
    Gasoil M1                    132.45     1.25       0.95    131.20   
  GOSGSWMc1
    Gasoil M1/M2                   1.39     0.19      15.83      1.20   
  GOSGSPDMc1
    Gasoil M2                    131.06     1.06       0.82    130.00   
  GOSGSWMc2
    Regrade M1                     1.16    -0.01      -0.85      1.17   
  JETREGSGMc1
    Regrade M2                     1.38     0.01       0.73      1.37   
  JETREGSGMc2
    Jet M1                       133.61     1.24       0.94    132.37   
  JETSGSWMc1
    Jet M1/M2                      1.17     0.17      17.00      1.00   
  JETSGSPDMc1
    Jet M2                       132.44     1.07       0.81    131.37   
  JETSGSWMc2
    Gasoil 0.5%-Dubai             19.91    -0.14      -0.70     20.05   
  GOSGCKMc1
    Cracks M1                                                            Gasoil 0.5%-Dubai             19.54    -0.25      -1.26     19.79   
  GOSGCKMc2
    Cracks M2                                                            Jet Cracks M1                 21.29    -0.13      -0.61     21.42   
  JETSGCKMc1
    Jet Cracks M2                 20.95    -0.23      -1.09     21.18   
  JETSGCKMc2
    East-West M1                  -7.25     2.81     -27.93    -10.06   
  LGOAEFSMc1
    East-West M2                 -17.23     1.15      -6.26    -18.38   
  LGOAEFSMc2
    LGO M1                       994.00     6.50       0.66    987.50   
  LGOAMc1
    LGO M1/M2                      0.38    -0.25     -39.68      0.63   
  LGOASPDMc1
    LGO M2                       993.63     6.75       0.68    986.88   
  LGOAMc2
    Crack LGO-Brent M1            18.82    -0.42      -2.18     19.24   
  LGOACKMc1
    Crack LGO-Brent M2            18.81    -0.26      -1.36     19.07   
  LGOACKMc2
      (Reporting by Jessica Jaganathan; Editing by Anthony Barker)  ((Jessica.Jaganathan@thomsonreuters.com)(+65 6870 3822)(Reuters Messaging: jessica.jaganathan.thomsonreuters.com@reuters.net))  Keywords: MARKETS DISTILLATES/ASIA