Gaffney, Cline & Associates is a petroleum consulting company headquartered in Alton

Alton, Hampshire

Alton is a historic market town and civil parish in the East Hampshire district of the English county of Hampshire. It had a population of 16,584 at the 1991 census and is administered by East Hampshire district council. It is located on the source of the River Wey and is the highest town in...

, the United Kingdom

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

, with offices in London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

, Houston, Moscow

Moscow

Moscow is the capital, the most populous city, and the most populous federal subject of Russia. The city is a major political, economic, cultural, scientific, religious, financial, educational, and transportation centre of Russia and the continent...

, Buenos Aires

Buenos Aires

Buenos Aires is the capital and largest city of Argentina, and the second-largest metropolitan area in South America, after São Paulo. It is located on the western shore of the estuary of the Río de la Plata, on the southeastern coast of the South American continent...

, Singapore

Singapore

Singapore , officially the Republic of Singapore, is a Southeast Asian city-state off the southern tip of the Malay Peninsula, north of the equator. An island country made up of 63 islands, it is separated from Malaysia by the Straits of Johor to its north and from Indonesia's Riau Islands by the...

, Almaty

Almaty

Almaty , also known by its former names Verny and Alma-Ata , is the former capital of Kazakhstan and the nation's largest city, with a population of 1,348,500...

, and Sydney

Sydney

Sydney is the most populous city in Australia and the state capital of New South Wales. Sydney is located on Australia's south-east coast of the Tasman Sea. As of June 2010, the greater metropolitan area had an approximate population of 4.6 million people...

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Gaffney, Cline & Associates was founded in 1962. Since 2008, it is a subsidiary of Baker Hughes

Baker Hughes

Baker Hughes Baker Hughes provides the world's oil & gas industry with products and services for drilling, formation evaluation, completion, production and reservoir consulting. Baker Hughes operates in over 90 countries worldwide mainly based in countries with a mature petroleum industry as is...

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One of the notable functions of Gaffney Cline, along with similar petroleum industry consultants such as DeGolyer and MacNaughton

DeGolyer and MacNaughton

DeGolyer and MacNaughton is a petroleum consulting company based in Dallas, Texas, with offices in Houston, Moscow, and Calgary.DeGolyer and MacNaughton was founded in 1936 by Everette Lee DeGolyer and Lewis MacNaughton. In 2004, it acquired Calgary-based Outtrim Szabo Associates forming its...

, Netherland, Sewell, RPS-APA and Ryder Scott

Ryder Scott

Ryder Scott is a Houston-based oil industry consultant, which like similar companies such as DeGolyer and MacNaughton, provides independent oil and gas reserves evaluation to oil majors and nation states...

, is to provide third party verification and/or valuation of oil and natural gas reserves - typically 1P proven reserves

Proven reserves

Proven reserves, also called proved reserves, measured reserves, 1P, and Reserves, are business or political terms regarding fossil fuel energy sources....

, but also 2P probable reserves and 3P possible reserves - for company annual report

Annual report

An annual report is a comprehensive report on a company's activities throughout the preceding year. Annual reports are intended to give shareholders and other interested people information about the company's activities and financial performance...

s and SEC filing

SEC filing

An SEC filing is a financial statement or other formal document submitted to the U.S. Securities and Exchange Commission . Public companies, certain insiders, and broker-dealers are required to make regular SEC filings. Investors and financial professionals rely on these filings for information...

20-F.