EOG Resources, Inc. (successor to Enron Oil & Gas Company) is an American petroleum and natural gas exploration company headquartered in the Heritage Plaza building in Houston, Texas.

The company is ranked #356 on the Fortune 500.

The company has reserves in the United States, Trinidad, the United Kingdom, and China.

As of December 31, 2016, the company had 2.118 billion barrels of oil equivalent (1.296×10 GJ) of estimated proved reserves, of which 52% was petroleum, 18% was natural gas liquids, and 30% was natural gas. Of these proved reserves, 97% were located in the United States and 3% were located in Trinidad.

In 2016, the company's production averaged 560 thousand barrels of oil equivalent (3,400,000 GJ) per day, of which 88% was in the United States (including 40% in the Eagle Ford shale and 15% in the Delaware Basin), 10% was in Trinidad, and 1% was in other areas.

As of December 31, 2016, of the company's total proved reserves in the United States, 56% was petroleum, 20% was natural gas liquids, and 24% was natural gas.

As of December 31, 2016, EOG was the largest petroleum producer in the Eagle Ford. In 2016, production by the company in the Eagle Ford averaged 220 thousand barrels of oil equivalent (1,300,000 GJ) per day.

In 2016, production by the company in the Delaware Basin averaged 85 thousand barrels of oil equivalent (520,000 GJ) per day. The company also owns properties in other areas of the Permian Basin, including the Leonard, Wolfcamp, and Second Bone Spring Sand shale plays.

In the Rocky Mountains, the company owns properties in the Williston Basin Bakken Formation and the Turner, Parkman and Niobrara Formations in the Powder River Basin.

EOG also owns properties in the Anadarko Basin, Haynesville Shale, the Fort Worth Basin, and the Marcellus Shale.

In 2007, EOG was awarded a license for two blocks in the East Irish Sea and, in 2009, the company drilled a successful test well.

As of December 31, 2016, EOG held approximately 40,000 net undeveloped acres in Trinidad.

In 2008, EOG acquired assets in the Chuan Zhong Block exploration area in the Sichuan Basin, Sichuan Province, China from ConocoPhillips.

In 1998, Mark G. Papa was named Chairman and Chief Executive Officer.

In 1999, its predecessor company, Enron Oil and Gas Company became independent from Enron Corp. and changed its named to EOG Resources, Inc. (EOG).

In 2000, the company swapped properties with Occidental Petroleum. EOG received properties in East Texas and the Oklahoma Panhandle in exchange for properties in California and the Gulf of Mexico.

In February 2000, the company also swapped properties with Burlington Resources. EOG received properties in West Texas and the New Mexico, specifically in the Permian Basin, in exchange for properties in Texas and Oklahoma.

In October 2000, the company was added to the S&P 500 index.

In 2003, the company acquired properties in Canada from Husky Energy for $320 million.

In 2006, the company signed a 225,648 square feet (20,963.4 m) lease for office space in the Heritage Plaza building in Houston, Texas. In 2008, EOG acquired assets in the Chuan Zhong Block exploration area in the Sichuan Basin, Sichuan Province, China from ConocoPhillips.

In 2010, the company announced major discoveries in the Eagle Ford shale.

In May 2011, the company sold gas-producing properties in South Texas and New Mexico for $637 million.

In December 2014, EOG sold its assets in Canada.

Also in December 2014, founder Mark G. Papa resigned from the board of directors.

In November 2015, the company spent $368 million to acquire additional acreage in the Delaware Basin.

In September 2016, EOG Resources acquired Yates Petroleum for 26 million shares of common stock valued at $2.3 billion and $37 million in cash. The acquisition increased EOG's holdings by 176,000 net acres in the Delaware Basin, 200,000 net acres in the Powder River Basin, and 138,000 net acres on the Northwest Shelf in New Mexico.

In 2017, the company formed a joint venture with The Carlyle Group to develop oil and gas assets in Ellis County, Oklahoma.