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Netherland, Sewell & Associates Inc. (NSAI)


Netherland, Sewell & Associates Inc. (NSAI) is a worldwide leader of petroleum property analysis to industry and financial organizations and government agencies. The company delivers fully integrated engineering, operational, geological, geophysical, petrophysical and economic solutions for all facets of the upstream energy industry.

Editor's note: Updated Dec. 10, 2019.

Headquarters Address

2100 Ross Avenue
Suite 2200
Dallas, TX 75201
United States

Main Phone Number


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