Exhibit 15.1 October 21, 1997 McMoRan Oil & Gas Co. 1615 Poydras St. New Orleans, LA 70112 Gentlemen: We are aware that McMoRan Oil & Gas Co. Inc. has incorporated by reference in its Registration Statements (File Nos. 33-82866, 33-99828, 33-80369, 33-80371, and 333-31279) its Form 10-Q for the quarter ended September 30, 1997, which includes our report dated October 21, 1997 covering the unaudited interim financial information contained therein. Pursuant to Regulation C of the Securities Act of 1933 (the Act), this report is not considered a part of the registration statements prepared or certified by our firm or a report prepared or certified by our firm within the meaning of Sections 7 and 11 of the Act. Very truly yours, /s/ Arthur Andersen LLP Arthur Andersen LLP