Common use of WEST PETROLEUM LTD Clause in Contracts

WEST PETROLEUM LTD. Per: (Signed) “Xxxx Xxxxxxxx” Xxxx Xxxxxxxx Executive Vice President and Chief Financial Officer Per: (Signed) “Xxxxx Xxxx” Xxxxx Xxxx General Counsel and Senior Vice President, Stakeholder Relations (May 5, 2009 Note Agreement) Accepted and agreed as of the date thereof. [NOTEHOLDER SIGNATURE PAGES] First Amending Agreement (May 5, 2009 Note Agreement) CONSENT AND ACKNOWLEDGEMENT OF GUARANTORS (First Amending Agreement to May 5, 2009 Note Agreement) The undersigned Guarantors hereby consent to the terms of the above Agreement and the transactions contemplated thereby and confirm that the guarantees and other security documents granted by each of the undersigned to or for the benefit of the holders of Notes are in full force and effect. Without limiting the generality of the foregoing, the undersigned acknowledge that the “Guaranteed Obligations” guaranteed by the undersigned pursuant to the respective guarantees executed by each of the undersigned include, without limitation, all obligations of the Company to the holders of Notes under the Note Agreement as so amended, and all Notes now outstanding or hereafter issued under the Note Agreement. For certainty, each reference to “Note Purchase Agreement” in each such guarantee executed by the undersigned shall include the Note Agreement as defined in this Agreement, as amended by this Agreement, and as hereafter further amended, further restated, or supplemented, modified or replaced from time to time. Dated as of December 2, 2010. TROCANA RESOURCES INC. PENN WEST PETROLEUM, by its managing partner, Penn West Petroleum Ltd.

WEST PETROLEUM LTD. Per: (Signed) “Xxxx Xxxxxxxx” Xxxx Xxxxxxxx Executive Vice President and Chief Financial Officer Per: (Signed) “Xxxxx Xxxx” Xxxxx Xxxx General Counsel and Senior Vice President, Stakeholder Relations First Amending Agreement (May 531, 2009 2007 Note Agreement) Accepted and agreed The foregoing Agreement is hereby accepted as of the date thereoffirst above written. [NOTEHOLDER SIGNATURE PAGES] First Amending Agreement (May 531, 2009 2007 Note Agreement) CONSENT AND ACKNOWLEDGEMENT OF GUARANTORS (First Amending Agreement to May 531, 2009 2007 Note Agreement) The undersigned Guarantors hereby consent to the terms of the above Agreement and the transactions contemplated thereby and confirm that the guarantees and other security documents granted by each of the undersigned to or for the benefit of the holders of Notes are in full force and effect. Without limiting the generality of the foregoing, the undersigned acknowledge that the “Guaranteed Obligations” guaranteed by the undersigned pursuant to the respective guarantees executed by each of the undersigned include, without limitation, all obligations of the Company to the holders of Notes under the Note Agreement as so amended, and all Notes now outstanding or hereafter issued under the Note Agreement. For certainty, each reference to “Note Purchase Agreement” in each such guarantee executed by the undersigned shall include the Note Agreement as defined in this Agreement, as amended by this Agreement, and as hereafter further amended, further restated, or supplemented, modified or replaced from time to time. Dated as of December 2, 2010. TROCANA RESOURCES INC. PENN WEST PETROLEUM, by its managing partner, Penn West Petroleum Ltd.

WEST PETROLEUM LTD. Per: (Signed) “Xxxx Xxxxxxxx” Xxxx Xxxxxxxx Executive Vice President and Chief Financial Officer Per: (Signed) “Xxxxx Xxxx” Xxxxx Xxxx General Counsel and Senior Vice President, Stakeholder Relations First Amending Agreement (May 5December 2, 2009 2010 Note Agreement) Accepted and agreed as of the date thereof. [NOTEHOLDER SIGNATURE PAGES] First Amending Agreement (May 5December 2, 2009 2010 Note Agreement) CONSENT AND ACKNOWLEDGEMENT OF GUARANTORS (First Amending Agreement to May 5December 2, 2009 2010 Note Agreement) The undersigned Guarantors hereby consent to the terms of the above Agreement and the transactions contemplated thereby and confirm that the guarantees and other security documents granted by each of the undersigned to or for the benefit of the holders of Notes are in full force and effect. Without limiting the generality of the foregoing, the undersigned acknowledge that the “Guaranteed Obligations” guaranteed by the undersigned pursuant to the respective guarantees executed by each of the undersigned include, without limitation, all obligations of the Company to the holders of Notes under the Note Agreement as so amended, and all Notes now outstanding or hereafter issued under the Note Agreement. For certainty, each reference to “Note Purchase Agreement” in each such guarantee executed by the undersigned shall include the Note Agreement as defined in this Agreement, as amended by this Agreement, and as hereafter further amended, further restated, or supplemented, modified or replaced from time to time. Dated as of December 2, 2010. TROCANA RESOURCES INC. PENN WEST PETROLEUM, by its managing partner, Penn West Petroleum Ltd.

WEST PETROLEUM LTD. Per: (Signed) “Xxxx Xxxxxxxx” Xxxx Xxxxxxxx Executive Vice President and Chief Financial Officer Per: (Signed) “Xxxxx Xxxx” Xxxxx Xxxx General Counsel and Senior Vice President, Stakeholder Relations First Amending Agreement (May 5July 31, 2009 2008 Note Agreement) Accepted and agreed as of the date thereof. [NOTEHOLDER SIGNATURE PAGES] First Amending Agreement (May 5July 31, 2009 2008 Note Agreement) CONSENT AND ACKNOWLEDGEMENT OF GUARANTORS (First Amending Agreement to May 5July 31, 2009 2008 Note Agreement) The undersigned Guarantors hereby consent to the terms of the above Agreement and the transactions contemplated thereby and confirm that the guarantees and other security documents granted by each of the undersigned to or for the benefit of the holders of Notes are in full force and effect. Without limiting the generality of the foregoing, the undersigned acknowledge that the “Guaranteed Obligations” guaranteed by the undersigned pursuant to the respective guarantees executed by each of the undersigned include, without limitation, all obligations of the Company to the holders of Notes under the Note Agreement as so amended, and all Notes now outstanding or hereafter issued under the Note Agreement. For certainty, each reference to “Note Purchase Agreement” in each such guarantee executed by the undersigned shall include the Note Agreement as defined in this Agreement, as amended by this Agreement, and as hereafter further amended, further restated, or supplemented, modified or replaced from time to time. Dated as of December 2, 2010. TROCANA RESOURCES INC. PENN WEST PETROLEUM, by its managing partner, Penn West Petroleum Ltd.