Anadarko Petroleum Corporation

Anadarko Petroleum Corporation was an independent exploration and production company engaged in the discovery, development, and production of crude oil and natural gas. Its operations spanned onshore and offshore fields, with a focus on extracting hydrocarbons for sale to refiners, marketers, and end‑users in the global energy market. The company managed the full upstream lifecycle, from seismic surveying and drilling to reservoir management and facility operation. Anadarko’s product mix included both liquid hydrocarbons and natural gas, which were delivered through pipelines, tankers, and processing plants.

Prior to its acquisition, Anadarko was recognized as one of the largest independent upstream firms in the United States, with a substantial asset base that extended across multiple continents. The company held significant proved reserves and maintained a steady output of oil and gas, contributing notably to domestic and international supply. Its portfolio featured deepwater developments in the Gulf of Mexico, onshore shale plays in the Rocky Mountains, and international ventures in Algeria and Mozambique. This geographic diversity gave Anadarko a broad operational footprint and exposure to varied regulatory environments.

Anadarko’s distinguishing attributes included expertise in complex deepwater engineering and the ability to execute large‑scale integrated projects under challenging conditions. The firm also cultivated strong capabilities in reservoir characterization and enhanced oil recovery techniques, which supported its competitive positioning in the upstream sector. Structurally, the Berkine subsidiary, which operated Algeria’s Block 404a, was a wholly owned part of Anadarko before the ransomware incident in April 2020. In 2019, Anadarko became a wholly owned subsidiary of Occidental Petroleum following Occidental’s acquisition of the company.