P.M. BRIEFING : Mobil to Trim Payroll by 400

NEW YORK —  Mobil Corp. said today that a previously announced reorganization of its U.S. operations would involve the reduction of about 400 employees nationwide.

The country’s second largest oil company behind Exxon Corp. said the biggest reduction would come from slashing the staff in its Denver office from 430 people to 105.

Charles E. Spruell, president of Mobil’s exploration and production unit, said the changes will be concentrated in operations responsible for drilling wells and pumping crude and natural gas.

Mobil called the reorganization part of an effort to cut costs and improve profits in the United States, where depressed oil prices have made exploration and drilling much less profitable.