EXHIBIT 23.B

Consent of Chief Reservoir Engineer

I hereby consent to the reference to and use of my reserves evaluation report dated January 31, 2005 by Shell Canada Limited (the “Corporation”) in its annual report on Form 40-F and Annual Information Form, each dated March 10, 2005, with respect to the Corporation’s reserves data and related information for the year ended December 31, 2004.

/s/ Bruce Roberts 

Bruce Roberts
Chief Reservoir Engineer
 
January 31, 2005