<DOCUMENT>
<TYPE>EX-5
<SEQUENCE>4
<FILENAME>ex5-3formf9a1_112706.txt
<DESCRIPTION>EXHIBIT 5.3
<TEXT>
                                                                    EXHIBIT 5.3
                                                                    -----------



                   [LETTERHEAD OF SPROULE ASSOCIATES LIMITED]


                                                          November 27, 2006


United States Securities and Exchange Commission


RE:    REGISTRATION STATEMENT ON FORM F-9 DATED NOVEMBER 27, 2006
       (THE "REGISTRATION STATEMENT") OF CANADIAN NATURAL RESOURCES LIMITED

We are a firm of independent  geological and petroleum engineer  consultants of
Calgary,  Alberta  having  prepared  a  corporate  evaluation  report  entitled
"Evaluation of the P&NG Reserves of Canadian Natural Resources Limited in North
America (As of December 31, 2005) Based on Constant  and  Escalated  Prices and
Costs" (the  "Report") of certain oil and gas  properties  of Canadian  Natural
Resources Limited. The Report was for the year ended December 31, 2005.

We  refer  to the  Registration  Statement  relating  to the  offering  of Debt
Securities  by Canadian  Natural  Resources  Limited and hereby  consent to the
reference to our firm under the heading  "Experts" and to the use of our Report
which is incorporated by reference in the Registration Statement.


                                           Sincerely,


                                           /s/ Harry J. Helwerda
                                           --------------------------------
                                           Harry J. Helwerda
                                           Senior Vice-President, Engineering



</TEXT>
</DOCUMENT>
