Anadarko Petroleum Corp. said on Tuesday it will reduce spending by about 33% this year, as the E&P company responds to lower crude oil prices.

Oil prices have fallen by more than half since June as supplies from sources including North American shale fields grow in a time of waning demand. To conserve cash, exploration and production companies like Anadarko are slashing budgets and cutting rig counts.

"We don't see value in chasing growth in this environment," Al Walker, Anadarko's CEO, told analysts on a conference call.

The Houston company forecast 2015 capital investments in the range of $5.4 billion to $5.8 billion, excluding those associated with its Western Gas Partners LP unit.

In addition to earmarking 60% of its budget for onshore shale wells, Anadarko said it plans to drill nine to 12 deepwater exploration wells offshore Colombia, Kenya and the Gulf of Mexico.

Anadarko also plans to cut U.S. onshore rig activity by 40% and defer about 125 onshore well completions in the Wattenberg Field in Colorado, the Eagle Ford Shale and Permian Basin in Texas.

Anadarko expects total output of 295 million to 301 million barrels of oil equivalent (MMboe) in 2015, nearly in line with the 301 MMboe it produced last year.

So far this year, Anadarko has agreed to sell $700 million in oil and gas properties and more deals are possible, but there are no plans to tap capital markets, the Houston company told investors.

The company's shares rose 0.2% to $82.21 in late-morning trading on the New York Stock Exchange. Up to Monday's close, the stock has fallen nearly 26% since June.