by President Robert S. Kaplan
U.S. crude oil production is estimated to have grown from 5.1 million barrels per day in May 2008 to approximately 10.6 million barrels per day in May 2018.[ 1], [ 2] As a result of this growth, the U.S. now represents approximately 13 percent of global crude oil production, up from 7 percent 10 years ago. Improvements in shale oil drilling and completion techniques have been a critical element of this growth, with much of the new production occurring in Texas as well as North Dakota, New Mexico, Oklahoma and Colorado.[ 3] While the U.S. continues to be a substantial crude oil importer, the shale boom has allowed our country to substantially reduce the percentage of petroleum product consumption that is supplied by imports.