EXHIBIT 4.6 ----------- TRUST INDENTURECnooc LTD • March 7th, 2013 • Crude petroleum & natural gas • Alberta
Company FiledMarch 7th, 2013 Industry Jurisdiction
ANDIndenture • March 7th, 2013 • Cnooc LTD • Crude petroleum & natural gas • New York
Contract Type FiledMarch 7th, 2013 Company Industry Jurisdiction
NEXEN INC. ANDCnooc LTD • March 7th, 2013 • Crude petroleum & natural gas • New York
Company FiledMarch 7th, 2013 Industry Jurisdiction
NEXEN INC.Supplemental Indenture • March 7th, 2013 • Cnooc LTD • Crude petroleum & natural gas
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THIS SECOND SUPPLEMENTAL INDENTURE (the “Supplemental Indenture”) dated as of February 4, 1999. BETWEEN:Second Supplemental Indenture • March 7th, 2013 • Cnooc LTD • Crude petroleum & natural gas • Alberta
Contract Type FiledMarch 7th, 2013 Company Industry JurisdictionCANADIAN OCCIDENTAL PETROLEUM LTD., a corporation incorporated under the Canada Business Corporations Act and having its head office in the City of Calgary, in the Province of Alberta (the “Corporation”)