CHENNAI, India, May 16 (Reuters) - The Middle East crude market steadied on Thursday as Qatar's al-Shaheen crude changed hands at levels similar to a month ago, suggesting that a gradual widening of margins may support spot differentials for July cargoes.     Traders remain bearish on the outlook, pointing out that refining margins continue to stay weak. Complex refining margins, which have risen above $6 per barrel this week, are still way below levels of $11 to $12 per barrel earlier this year.     "With refiners contemplating cutting runs some more, it doesn't bode well for the spot market," said a trader at a southeast Asian refiner. "Although refining margins seem to have bottomed."          * TRADES:     - Maersk sold its July al-Shaheen crude at $1.40-$1.50 per barrel, the same as last month, sources said. The buyer was a Japanese firm, most likely TonenGeneral, they added.     - July Murban may have been traded at a slightly higher premium than last month, sources said, but the deal could not be confirmed. The crude likely changed hands at about 30 cents per barrel below its official selling price, compared with a 41-42 cent discount last month, they added.                         * MARKET NEWS     - Sinopec Shanghai Gaoqiao Co, a subsidiary of top Asian refiner Sinopec Corp, has shut down a secondary unit that produces gasoline due to a fire extinguished in about 15 minutes, a company spokesman said.  
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       - Venezuela's oil and fuel shipments to China rose 18 percent in the first four months of 2013 to 626,000 bpd, Oil Minister Rafael Ramirez said.  
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       -  Tehran is ready to continue nuclear diplomacy with world powers before or after the June presidential election in Iran, its chief negotiator said.  
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         CRUDE ($/bbl)                        Price     Prev     Change  JUL DME Oman diff to Dubai swap         0.93     1.07    -0.14  JUN Brent   
  BRENTSGMc1
                 103.08   102.15    +0.93  JUL Dubai  
  DUBSGSWMc2
                   99.27    98.37    +0.90  JUL DME Oman                          100.20    99.44    +0.76  JUN Brent/Dubai EFS  
  DUB-EFS-1M
          3.38     3.36    +0.02                                                            PRODUCT CRACKS                                            JUN fuel oil crack  
  FO180SGCKMc1
       -6.57     -6.87    +0.30  JUN gasoil crack  
  GOSGCKMc1
            15.93     16.32    -0.39  JUL naphtha crack  
  NAFOBSGCKMc1
        -9.55     -9.32    -0.23                                                            COMPLEX REFINERY MARGINS  
  REF/MARGIN1
                      Today                                   5.60              Last 5 days                             5.94              Last 365 days                           7.43                (Reporting by Ramya Venugopal; Editing by Clarence Fernandez)  ((ramya.venugopal@thomsonreuters.com)(+91 80562 88685)(Reuters Messaging: ramya.venugopal@thomsonreuters.com.reuters.net))  
 ((RECENT CRUDE OIL TRADES           Asia... 
  ACRU/T
        Europe... 
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       Americas... 
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                                CRUDE OIL MARKET NEWS           Crude oil tenders in Asia................... 
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             Refinery outages in Asia.................... 
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             Global arbitrage news and flows................. 
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             W.African crude imports to Asia,  monthly........ 
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                             REFINERY MAINTENANCE DIARIES           Asia... 
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      Europe... 
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                                NATIONAL CRUDE IMPORT DATA           Japan.............. 
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                                   CRUDE OIL INVENTORY DATA           Japan... 
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       US... 
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                             CRUDE OIL PRODUCTION/OILFIELD NEWS           OPEC output survey... 
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    New Asian  fields... 
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             New Africa fields... 
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    New Americas  fields.. 
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             New projects..... 
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                                CRUDE OIL MARKET REPORTS           Middle East........... 
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      Asia-Pacific........ 
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             West Africa......... 
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     North  Sea............ 
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             Asia outlook....... 
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     Europe  outlook..... 
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             Global futures report... 
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     Technicals  report...... 
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                                     PRICES           For all Official Selling  Prices...................... 
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             For a POLL on oil  prices............................ 
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             NYMEX and ICE oil  futures........................... 
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             Dubai, Oman swaps and  spread............... 
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             Middle East physical crude  diffs............... 
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             Australia physical crude, Tapis  swaps.......... 
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             Asia-Pacific physical  crude.................... 
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             All Asian crude oil  differentials................ 
  0#C-DIF-A
             All Asian crude oil outright  prices.................. 
  0#C-A
      ))  Keywords: MARKETS MIDEAST CRUDE/