The oil and natural-gas production boom sweeping the U.S. may be good for the country's economic health, but it hasn't recently been much help to energy giant Exxon Mobil Corp. Lackluster second-quarter financial results from Exxon's U.S. oil and natural-gas production cast a shadow on the record global profit the company reported Thursday
The oil and natural-gas production boom sweeping the U.S. may be good for the country's economic health, but it hasn't recently been much help to energy giant Exxon Mobil Corp.

Lackluster second-quarter financial results from Exxon's U.S. oil and natural-gas production cast a shadow on the record global profit the company reported Thursday.

With its 2010 purchase of natural-gas driller XTO Energy, Exxon became the biggest gas producer in the country -- shortly before natural-gas prices began heading toward 10-year lows. Exxon, based in Irving, Texas, said it believes its $31 billion purchase was a strong strategic move and is optimistic that natural-gas prices will rebound.

But analysts continue to question the deal as it weighed on the company's U.S. earnings and appears set to do the same for more quarters to come. Exxon spent about 29% of its capital expenditures on U.S. drilling operations but generated only 4% of its profit in this segment.

Exxon reported second-quarter net income of $15.9 billion, up from $10.68 billion a year earlier and a quarterly record for the company. It appears to be a record for any U.S. company under current accounting rules, according to Howard Silverblatt, a Standard & Poor's analyst.

About $7.5 billion of that profit, however, came from asset sales -- including the disposal of some of Exxon's Japanese refining business -- and tax-related losses. Without those items, profit totaled $8.4 billion, or $1.80 per share, below most analysts' estimates.

Revenue rose 1.5% to $127.36 billion.

Exxon's U.S. exploration-and-production business reported profit down 53% to $678 million because of lower natural-gas and oil prices.

Exxon's XTO acquisition was meant to bolster its reserves and give it exposure to the growing business of extracting natural gas from shale formations in the U.S. Natural-gas prices have fallen due to excess domestic production, dipping below $2 per million British thermal units earlier this year before rebounding to just above $3.

The company said earlier this year it had made the purchase knowing that gas prices would decline, but Exxon CEO Rex Tillerson told analysts this spring he hadn't expected the persistence of the U.S. economic slump, which dented demand for natural gas.

Analysts have raised concerns about whether Exxon would have to write down the value of its natural-gas reserves given persistently low prices, as Encana Corp. of Canada did Wednesday to the tune of $1.7 billion.

David Rosenthal, Exxon's vice president of investor relations, said Thursday the company erred on the conservative side when valuing its reserves and didn't anticipate the need to revise them.

Other major oil and gas companies have been hurt by lower prices, but few of the big diversified companies appear to be feeling the impact as much as Exxon, which reduced gas as a percentage of its overall energy production to under 47% in the second quarter, down from over 51% in the first quarter.

Chevron Corp., which reports earnings Friday, has just 31% of its U.S. production from natural gas, while BP PLC, which reports Tuesday, has 42%. About 45% of Royal Dutch Shell PLC 's U.S. production is natural gas; the company reported Thursday that its net profit fell 53% to $4.06 billion because of poor global economic conditions and lower oil and gas prices.

Exxon emphasized that it was ramping up oil projects in the U.S., including in North Dakota's Bakken Shale, where it is now producing about 32,000 barrels of oil equivalent per day, double the output from a year ago.

The company continues to invest heavily in the U.S. despite declining production revenues. It spent $2.66 billion in the second quarter on oil-and-gas exploration in the U.S., down from $4.08 billion in the same quarter last year when Exxon expanded its stake in the Marcellus Shale, but up 23% from the third quarter of 2011.

Companies need to continue to invest in production, even when prices are weak, said Fadel Gheit, an analyst with Oppenheimer & Co.

"Most large companies are facing an uphill battle, maintaining, let alone growing production," Mr. Gheit said. "Replacing reserves at a competitive cost is the most critical issue facing these companies."

Exxon stock closed up 1.3% at $86.52 on the record global profit, lifting its market capitalization to $404.6 billion.