Chesapeake Energy Corp.'s (CHK) shares jumped 7% Thursday to the highest level in more than a year, as the energy producer reported rising oil output and its new chief executive pledged to close a persistent gap between its spending and cash flow by next year. Chesapeake's profit of $580 million fell 40% from a year earlier. But stripping out one-time effects such as asset sales and after-tax charges, earnings per share rose to 51 cents from six cents in 2012. Oil production increased 44% from a year ago and 12% from the previous quarter
Chesapeake Energy Corp.'s (CHK) shares jumped 7% Thursday to the highest level in more than a year, as the energy producer reported rising oil output and its new chief executive pledged to close a persistent gap between its spending and cash flow by next year.

Chesapeake's profit of $580 million fell 40% from a year earlier. But stripping out one-time effects such as asset sales and after-tax charges, earnings per share rose to 51 cents from six cents in 2012. Oil production increased 44% from a year ago and 12% from the previous quarter.

Shares of the Oklahoma City-based company ended at $24.95 after the stock's largest single-day gain in a year.

Doug Lawler, in his debut as Chesapeake's second-ever chief executive, said the company would focus on reining in spending and exploiting its most profitable assets.

Mr. Lawler, who took over from Chesapeake co-founder Aubrey McClendon in June, praised Chesapeake for its "abundance of opportunities and strong foundation," but said he would steer the company away from drilling geared at preserving leases. He suggested the company would allow some of its drilling leases to expire if they didn't yield the highest returns.

He also announced a comprehensive review of where Chesapeake spends its money with an eye to reducing the company's financial complexity, without offering specifics.

Mr. McClendon, who founded Chesapeake in 1989, built the company into a powerhouse at the vanguard of tapping natural gas from shale-rock formations. The company routinely spent more money on drilling and acquisitions than it brought in from operations, piling on debt.

Chesapeake spent $6 billion more in 2012 on drilling and completing wells than the cash generated from its operations, and to cover its costs it raised more than $11 billion last year by selling assets.

But rising oil production, combined with modestly higher gas prices, have helped double cash flow from the first half of 2013 compared with last year, to $2.2 billion. That is about $900 million less than Chesapeake's well costs over the same period.

The company still carries a heavy debt load of $13 billion, up 7.4% from the beginning of the year. Chesapeake executives said they would seek to pay down the debt with proceeds from additional asset sales, having struck deals to sell about $4 billion of assets so far this year.