Exhibit 23.3
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LETTER OF CONSENT
To: United States Securities and Exchange Commission
Re: Pogo Producing Company (“Pogo”) – Registration Statement on Form 8-K
We hereby consent to the use of our name and the information from our report regarding our estimates of reserves and future net revenues from the production and sale of those reserves of Northrock Resources Ltd. as of June 30, 2005, in Pogo Producing Company’s Current Report on Form 8-K, and to the incorporation by reference thereof into Pogo Producing Company’s previously filed Registration Statement Nos. 33-54969, 333-04233, 333-72129, 333-75105, 333-75105-01, 333-75105-02, 333-74861, 333-42426, 333-42428, 333-60800, 333-67324, 333-59426, 333-65548, 333-86856, 333-98205, 333-102775 and 333-126097.
| /s/ Ryder Scott Company-Canada |
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| RYDER SCOTT COMPANY-CANADA |
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September 19, 2005 |
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Calgary, Alberta |
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