By Steve Gelsi, MarketWatch NEW YORK (MarketWatch) -- Energy stocks moved up to mixed trading Wednesday after petroleum inventories rose by a narrower-than-expected margin and refinery utilization ticked up, while a profit warning from Halliburton weighed on oil service shares. U.S. petroleum supplies rose by 1.02 million barrels in the past week, according to data from the Energy Information Administration. The figure came in below the forecast for a rise of 1.4 million barrels in a survey of analysts by Platts. Refinery utilization rose to 80.3% from 79.4% in the past week. . Against this backdrop, the NYSE Arca Oil Index (XOI 1,094, +2.50, +0.23%) rose 0.1% to 1,094. The NYSE Arca Natural Gas Index (XNG 507.44, +2.95, +0.58%) advanced 0.5% to 507. The Philadelphia Oil Service Index (OSX 192.08, -0.67, -0.35%) dipped 0.4% to 192. By Steve Gelsi, MarketWatch NEW YORK (MarketWatch) -- Energy stocks moved up to mixed trading Wednesday after petroleum inventories rose by a narrower-than-expected margin and refinery utilization ticked up, while a profit warning from Halliburton weighed on oil service shares. U.S. petroleum supplies rose by 1.02 million barrels in the past week, according to data from the Energy Information Administration. The figure came in below the forecast for a rise of 1.4 million barrels in a survey of analysts by Platts. Refinery utilization rose to 80.3% from 79.4% in the past week. . Against this backdrop, the NYSE Arca Oil Index (XOI 1,094, +2.50, +0.23%) rose 0.1% to 1,094. The NYSE Arca Natural Gas Index (XNG 507.44, +2.95, +0.58%) advanced 0.5% to 507. The Philadelphia Oil Service Index (OSX 192.08, -0.67, -0.35%) dipped 0.4% to 192.

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