SINGAPORE, May 21 (Reuters) - Asia-Pacific crude market rose on Monday on robust demand from Shell as the oil major bought at least four July cargoes at higher premiums than the previous month. * TRADE - Shell bought a Labuan cargo from Petronas at $9-$9.20 a barrel above dated Brent, about 50 cents higher in premium than the previous month. * TENDERS - Vietnam's PV Oil sold three Chim Sao crude cargoes for July loading in a tender at higher premiums than the previous month on robust demand from a major oil company, traders said. Shell snapped up all three cargoes in the tender at between $8 and $8.50 a barrel above dated Brent, they said, or $1-$2 higher in premiums than the previous month. The 300,000-barrel cargoes will load on July 4-8, 14-18 and 24-28. - Murphy Oil is likely to have awarded a cargo of Kikeh crude for July 12-17 loading in a tender that closed early Monday. A trader said the cargo was sold at a premium of $8.50 a barrel to dated Brent although this could not be confirmed. - Sakhalin Energy offered 730,000 barrels of Vityaz crude for loading on July 30-Aug. 6. The tender will close on May 22 with bids valid until a day later. - Taiwanese refiner CPC Corp is seeking sweet crude for July loading in a tender that will close on May 22. Offers will stay valid until May 24. - India's BPCL has issued a tender to buy light sweet crude for loading in the last 10 days of July. Grade offers should be submitted by May 25 and price offers should be done by May 28. Offers remain valid until May 29. * MARKET NEWS - Japan's AOC Holdings said its Fuji Oil unit plans to refine 8 percent more crude oil in the year to end-March 2013 than a year earlier, to meet firm demand for low-sulphur fuel oil for power generation after the March 2011 earthquake. - Indian refiner MRPL secured coverage from an Iranian insurer for a crude cargo that arrived last week, becoming the first Indian firm known to have taken such action as Western sanctions tighten, sources with knowledge of the matter said. - China's crude oil imports from Iran rebounded more than 50 percent in April from March after resolving pricing disputes over term contracts, but shipments fell nearly a quarter from a year ago, with Saudi Arabian supplies helping to plug the gap. - Small non-OPEC producer Oman expects to raise its average oil and condensate production to 915,000 barrels per day (bpd) in 2012, up from the 885,000 bpd last year, the oil ministry said. CRUDE Price Prev Change JULY Brent 107.99 107.15 0.84 JULY Brent/Dubai EFS DUB-EFS-1M 3.86 3.67 0.19 PRODUCT CRACKS Price Prev Change JUNE fuel oil crack -4.10 -4.24 0.14 JUNE gasoil crack 15.87 16.17 -0.30 JULY naphtha crack -11.16 -10.12 -1.03 COMPLEX REFINERY MARGINS Today 5.77 Last 5 days 6.25 Last 365 days 7.54

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