With a focus on serving companies in the energy sector, Baker Botts has a long and rich experience advising on tax issues unique to the oil and gas industry. Clients understand the importance of selecting advisors who appreciate the history and evolution of oil and gas tax issues, given the sparseness of Code provisions and judicial decisions setting forth the peculiar rules and concepts unique to the industry. Their lawyers have the vital expertise that clients need when dealing with such conceptual issues as the pool-of-capital doctrine or the essence of the economic interest to the intricacies of the details of the depletion or intangible drilling cost rules. www.bakerbotts.com

With more than 2,500 oil and gas professionals worldwide, Deloitte's Oil & Gas practice is focused on providing audit and enterprise risk services, tax services, consulting services and financial advisory services to companies in all segments of the oil and gas industry. Their oil and gas industry specialists help clients develop solutions for capitalizing on the opportunities and managing the challenges. www.deloitte.com

The Ernst & Young Global Oil & Gas Center brings together the people and ideas that help successfully address the complexities of today's global oil and gas business. Ernest & Young brings together a global network of energy professionals that work closely with clients to develop coordinated approaches to managing risk, optimizing performance, and increasing operational effectiveness, while bringing insights into the major trends that impact their clients' business — both now and in the future. www.ey.com

Fulbright & Jaworski is recognized as a premier energy firm with a diversified practice that serves the needs of the global energy industry. With over 50 years of experience in energy matters, Fulbright & Jaworski has accumulated a wealth of experience and valuable knowledge. Their attorneys are regularly involved in both international and domestic energy matters and are highly skilled in energy litigation, transactions, regulatory matters and dispute resolution. www.fulbright.com

KPMG's Global Energy & Natural Resources (ENR) practice is dedicated to assisting all major organizations operating in the Oil & Gas, Power & Utilities, Mining and Forestry industries in dealing with industry trends and business issues. KPMG's reason for being is a distinctive portfolio of service offerings which have been carefully tailored to the needs of their clients, and is delivered by industry focused professionals. KPMG has a well balanced portfolio of clients, ranging from global super-majors to next generation leaders including those raising capital, some for the first time, in local markets. Services provided cover the breadth of KPMG's service offerings, extending from Audit, to Advisory—Financial, Risk and Communications, to Tax. www.kpmg.com

Miller & Chevalier, which is ranked among the top tax practices in the U.S. by Chambers USA, was founded as the first federal tax practice in the United States. Since its founding, the firm has stayed at the forefront of the evolution of tax law and policy, through the breadth of its practice, the experience of its lawyers, the positions its lawyers have held in government and the tax bar, and the results they have achieved for their clients. Now providing its fourth generation of leaders in the US tax bar, the firm continues its close involvement with the emergence and development of issues of tax law and policy through the federal, legislative and regulatory processes. Focused on corporate tax issues, the firm's tax practice spans business transactions and reorganizations, employee benefits, international tax, tax accounting, financial products, and tax policy. www.millerchevalier.com

PricewaterhouseCoopers has been providing professional services to energy, utilities, and mining companies for more than 100 years. They help companies confront the industry's most challenging changes and issues including: addressing sustainability, complying with regulatory and reporting requirements, improving performance and operational effectiveness, managing industry regulatory change, industry transactions and consolidation, managing financial risk, managing geopolitical risk, recruiting and retaining a skilled workforce and securing the supply. www.pwc.com

For over 90 years, Thompson & Knight has counseled energy clients in the U.S. and around the world with a diversified practice in the exploration and development of crude oil and natural gas. They represent multinational and independent oil and gas companies, host government energy companies, large utilities, private power plants, energy industry service companies, refineries, petrochemical companies, financial institutions, and multinational drilling contractors and construction companies. In addition, Thompson & Knight attorneys represent refinery owners in transactions involving structuring refinery acquisitions and sales, due diligence and assessment of environmental liabilities. www.tklaw.com

Drawing on almost a century of worldwide leadership in the energy sector, V&E assists clients with the increasingly complex issues emerging in this rapidly changing industry. V&E provided legal services for more than 2,000 energy industry transactions, arbitrations, lawsuits, and regulatory proceedings collectively involving more than $187 billion in 2006. In recognition of their worldwide capabilities, extensive industry experience and value-added approach, major research publications, including Euromoney, Chambers USA, Chambers Global and Petroleum Economist awarded V&E their highest rankings in the energy field. www.velaw.com