**Exhibit 99.11**

 
|                           | **GLJ** | Petroleum   Consultants | Principal Officers:    Harry Jung, P. Eng. |
|---------------------------|---------|-------------------------|--------------------------------------------|
| President,   C.E.O.       |
| Dana B. Laustsen, P. Eng. |
| Executive   V.P., C.O.O.  |
| Keith M. Braaten, P. Eng. |
|                      |    |                    | Executive   V.P.                           |
|                      |    |                    |                                       |
|                      |    |                    | Officers / Vice Presidents:                |
|                      |    |                    | Terry L. Aarsby, P. Eng.                   |
|                      |    |                    | Jodi L. Anhorn, P. Eng.                    |
|                      |    |                    | Leonard L. Herchen, P. Eng.                |
|                      |    |                    | Myron J. Hladyshevsky, P. Eng.             |
|                      |    |                    | Bryan M. Joa, P. Eng.                      |
|                      |    |                    | Mark Jobin, P. Geol.                       |
|                      |    |                    | John E. Keith, P. Eng.                     |
|                      |    |                    | John H. Stilling, P. Eng.                  |
|                      |    |                    | Douglas R. Sutton, P. Eng.                 |
|                      |    |                    | James H. Willmon, P. Eng.                  |

 

Encana Corporation

1800, 855-2nd Street SW

Calgary, Alberta T2P 2S5

 

**CONSENT OF INDEPENDENT PETROLEUM ENGINEERS**

 

We hereby consent to the use and reference to our name and reports evaluating a portion of Encana Corporation’s petroleum and natural gas reserves as of December 31, 2010, and the information derived from our reports, as described or incorporated by reference in: (i) Encana Corporation’s Annual Report on Form 40-F, (ii) Encana Corporation’s Registration Statement on Form F-3 (File No. 333-150453), (iii) Encana Corporation’s Registration Statements on Form S-8 (File Nos. 333-124218, 333-85598 and 333-140856); and (iv) Encana Corporation’s Registration Statement on Form F-9 (File No. 333-165626), filed with the United States Securities and Exchange Commission.

 
|                   | Yours truly,                       |
|------------------------|------------------------------------|
|                   |                               |
|                   | **GLJ PETROLEUM CONSULTANTS LTD.** |
|                   |                               |
|                   | *“ORIGINALLY SIGNED BY”* |
|                   |                               |
|                   | Harry Jung, P. Eng.                |
|                   | President                          |
|                   |                               |
|                   |                               |
| Calgary, Alberta       |                               |
| February 17, 2011 |                               |

 

4100, 400  –  3rd Avenue S.W., Calgary, Alberta, Canada  T2P 4H2  •  (403) 266-9500  •  Fax (403) 262-1855  •  

GLJPC.com

 

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