Oil, Gas Prices Help Chevron Earnings  NEW YORK (Reuters) - ChevronTexaco Corp.&lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=CVX.N target=/stocks/quickinfo/fullquote"&gt;CVX.N&lt;/A&gt;, the No. 2  U.S. oil company, on Friday reported a rise in quarterly  profit, pumped up by record oil and gas prices and gains on  asset sales.