Chevron Corp. said Friday that its second-quarter profit rose 11 percent to a record $6 billion, even though production slipped and the San Ramon, Calif., company lost money refining and selling fuel. In the April-June quarter, Chevron, the country's second-largest oil company, posted net income of $6 billion, or $2.90 a share, up from $5.4 billion, or $2.52, in the year-ago quarter. Operating revenue rose 49 percent to $81 billion. Chevron Chief Executive Dave O'Reilly said it benefited from higher oil/gas prices.