July 31 (Reuters) - Austrian oil and gas group OMV reported a second-quarter adjusted operating result below expectations on Wednesday, partly hit by lower profit in its energy segment.

The Vienna-based company said its quarterly operating profit, adjusted to remove one-off effects and inventory gains or losses, rose 4% to 1.23 billion euros ($1.33 billion) in the quarter, 4.5% below the average estimate of 1.29 billion euros in a company-provided poll of analysts. ($1 = 0.9238 euros) (Reporting by Tristan Veyet and Isabel Demetz in Gdansk, editing by Milla Nissi)