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Private company

CNOOC Petroleum North America

Chinese oil and gas company, Alberta, Canada-based subsidiary of CNOOC

CNOOC Petroleum North America ULC, formerly known as Nexen, is a Canadian oil and gas company based in Calgary, Alberta. Originally the Canadian subsidiary of US-based Occidental Petroleum (known as Canadian Occidental Petroleum or CanOxy), it became an independent company, Nexen, in 2000.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

Jul 12, 1971Founded1

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CNOOC Petroleum North America ULC, formerly known as Nexen, is a Canadian oil and gas company based in Calgary, Alberta. Originally the Canadian subsidiary of US-based Occidental Petroleum (known as Canadian Occidental Petroleum or CanOxy), it became an independent company, Nexen, in 2000.2

Subsidiaries and ownership

Owners

From Wikidata.1

Timeline

  1. Jul 12, 1971Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

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