Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference of our report dated February 21, 2012 (except for the matters discussed in Notes 25 and 26, as to which the date is December 3, 2012), with respect to the consolidated financial statements, condensed consolidating financial information, and financial statement schedule of ConocoPhillips, included in this Current Report on Form 8-K of ConocoPhillips dated December 3, 2012, in the following registration statements and related prospectuses.

ConocoPhillips |  | Form S-3 |  | File No. 333-179626 |  |
ConocoPhillips |  | Form S-4 |  | File No. 333-130967 |  |
ConocoPhillips |  | Form S-8 |  | File No. 333-98681 |  |
ConocoPhillips |  | Form S-8 |  | File No. 333-116216 |  |
ConocoPhillips |  | Form S-8 |  | File No. 333-133101 |  |
ConocoPhillips |  | Form S-8 |  | File No. 333-159318 |  |
ConocoPhillips |  | Form S-8 |  | File No. 333-171047 |  |
ConocoPhillips |  | Form S-8 |  | File No. 333-174479 |  |

/s/ Ernst & Young LLP

Houston, Texas

December 3, 2012

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