July 9 (Reuters) - BP expects lower realised

refining margins and a weak oil trading to hurt its

second-quarter earnings, the oil firm said on Tuesday.

The hit from refining margins is expected to be between $500

million to $700 million, it said in a statement.

The London-based company said it also expects to book

impairments of $1 billion to $2 billion in the second quarter.

This includes charges related to an ongoing review of its

Gelsenkirchen refinery in Germany which was announced in March.

BP's earnings snapshot comes after U.S. oil major Exxon

Mobil ( XOM ) signalled on Monday that lower refining margins

across the industry and lower natural gas prices would reduce

profits in the second quarter.