Exhibit 16.1 April 8, 2002 Office of the Chief Accountant Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 Dear Sir or Madam: We have read the second and third paragraphs of Item 4 included in the Current Report on Form 8-K dated April 5, 2002 of Spinnaker Exploration Company to be filed with the Securities and Exchange Commission and are in agreement with the statements contained therein. Very truly yours, /s/ ARTHUR ANDERSEN LLP - ----------------------- Arthur Andersen LLP Copy to: Robert M. Snell - Spinnaker Exploration Company