Encompassing all aspects of the industry, including governmental regulation, financing, exploration and production, refining, transportation, and marketing, O’Melveny’s Oil, Gas, Resources and Mining Group is unique in its diversity. Our full-service team is built to help oil, gas, and pipeline operators, metals, mining, and forest products companies—and the investors who finance them—preserve value, capitalize on opportunities, and achieve their strategic objectives.

The far-reaching, multi-disciplinary composition of our team allows us to produce strong results for clients, whether in high-stakes environmental actions in the US, key transactions in Southeast Asia, high-value joint ventures, a review of the business practices of emerging markets subsidiaries, or industry-related restructurings.

From the acquisition and exploitation of exploration and production rights to the sale and transport of raw materials and finished product, we blend sophisticated industry knowledge with diverse securities, environmental, regulatory, tax, restructuring, and transactional law capabilities.

Our deep knowledge of local culture and business practices in markets around the world allows clients to pursue strategically important business initiatives with confidence.

Apollo Global Management

In 2014, O’Melveny provided diligence and documentation services on various acquisitions that bolstered Apollo’s energy portfolio. Read

Cal Dive International

When a sharp decline in oil prices set of a wave off exploration and production industry bankruptcies, O’Melveny stepped in to assist Houston-based oil and gas infrastructure company Cal Dive International in its chapter 11 bankruptcy. Read

Case Study: Chevron

In a suit brought in the Northern District of California on behalf of more than 40,000 401(k) plan participants, O'Melveny overcame many of the arguments typically asserted in fiduciary breach cases.


China Polymetallic Mining Limited

We represented China Polymetallic Mining, the largest lead and zinc pure mining company in Yunnan, in its HK$1.46 billion initial public offering on the Main Board of the Hong Kong Stock Exchange. Read

Mongolian Mining and Gas Companies

O’Melveny obtained a significant victory for two Mongolian mining and gas companies in an arbitration arising from a series of sales contracts entered into with a leading Japanese trading company for the purchase of mining equipment.  Read

Nations Petroleum LLC

We represented Nations Petroleum (California) LLC, the California affiliate of the international oil and gas corporation Nations Petroleum Company Ltd., in the sale of its oil and gas operations and related assets in the Northwest Lost Hills oil field in Kern County, California to OXY USA Inc. for a purchase price in excess of US$700 million. Read

SteelRiver Infrastructure Partners

A multidisciplinary team of O’Melveny lawyers represented SteelRiver Infrastructure Partners in its US$720 million acquisition of the natural gas distribution business of EQT Corporation (Equitable) by PNG Companies LLC, an affiliate of Peoples Natural Gas Company LLC (Peoples), a portfolio company of SteelRiver. Read
    • Alcoa Inc. 
    • Apollo Global Management
    • China Polymetallic Mining Limited
    • El Paso Energy
    • Entegra Power Group
    • Exxon Mobil Corproation 
    • Nations Petroleum (California) LLC
    • Mitsui & Co. Global Investment Ltd. 
    • Occidental Petroleum
    • Parallel Petroleum
    • Pioneer Natural Resources Company 
    • Rio Tinto 
    • SteelRiver Infrastructure Partners
    • US Borax