CNQ Canadian Natural Resources Ltd

Canadian Natural Resources Limited ("Canadian Natural" or the "Company") (TSX: CNQ) (NYSE: CNQ) announces monthly production of Synthetic Crude Oil ("SCO") at Horizon Oil Sands as follows:

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Month                                                 SCO Production (bbl/d)
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Q1 2010                                                              86,995
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April 2010                                                        101,000(i)
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May 2010                                                           81,400(i)
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June 2010                                                         117,600(i)
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Q2 2010                                                              99,950
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July 2010 forecast                                          100,000-103,000
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(i)rounded to the nearest hundred

Proactive maintenance, which reduced plant capacity by approximately 50%, has been taken late in July to replace a number of coker valves and to address some very localized pipe wall thinning in the amine unit. Planned maintenance activity in August includes Ore Preparation Plant screen changes, and a routine pigging cycle. August 2010 production is expected to be between 102,000 and 107,000 barrels per day of SCO.

The Company targets stable production levels of approximately 110,000 barrels per day of SCO for the remainder of 2010 and will continue to complete strategic maintenance as required.

Canadian Natural is a senior crude oil and natural gas production company, with continuing operations in its core areas located in Western Canada, the U.K. portion of the North Sea and Offshore West Africa.

Contacts: John G. Langille Vice Chairman Steve W. Laut President Corey B. Bieber Vice-President, Finance & Investor Relations Canadian Natural Resources Limited 2500, 855 2nd Street S.W. Calgary, Alberta, T2P 4J8 Canada Phone: (403) 514-7777 ir@cnrl.com www.cnrl.com