Chevron Corporation has said that its second-quarter earning from pumping oil will be better than the first three months of the year, when low crude and natural gas prices contributed to the worst results in years for oil companies.

But the company said earnings from refining fuel will be far lower than the first quarter. Chevron said it was hurt by significantly lower refining margins in the US.

It also noted that foreign currency effects related to the week dollar would crimp the bottom line.

On a year-over-year basis, Chevron’s overall second-quarter results are forecast to be much lower than those for 2008.

Benchmark crude soared to record levels near $150 a barrel a year ago before plunging below $35 this year. But prices began to rebound at the end of the first quarter and last week hovered around 60 a barrel.

During the first two months of the second quarter, Chevron said the price it received for crude average $48.79 a barrel, up from $36.85 in the first three months of the year but not even close to the $113.97 a barrel it average in the same quarter a year ago.

Natural gas prices for the first two months of the second quarter average \$3.26 for 1,000 cubic feet. That’s below the $4.14 it realized in the first quarter and well off the $9.84 it got a year ago.

The California-based oil giant provided the guidance in an overview of market conditions for the April-June period.

Chevron didn’t provide any specific earnings projections, but Wall Street is expecting its results to be significantly lower than a year ago. Chevron is set to report second-quarter earning July 31.

For now, the average earnings estimate among analysts surveyed by Thomson Reuters is $1.28 a shares, well off the $290 a share Chevron posted last year when crude prices were on their way to record heights.

During April and May, Chevron said production rose 11,000 barrels of oil equivalent per day it pegged the jump primarily to the restoration of operations in the Gulf of Mexico following last year’s hurricanes.

For those same two months, the company said results from its overseas exploration and production operations included unfavourable foreign currency effects of more than $400 million. The reason, Chevron said, was the weakening dollar against most other major currencies, and it said the trend continued in June.

For the full second quarter, Chevron said U.S. refining margins fell sharply from both the first quarter and the year-ago period. Abroad, refining margins were mixed.

The company also said its quarterly after-tax charges for corporate and other activities will range between $250 million and $350 million.

Aerial view of Chevron’s Escravos Tank Farm in Delta State