https://www.worldenergynews.com/news/eia-report-lower-prices-lead-decline-oil-654976
EIA report: Lower Prices Lead to Decline in Oil, Gas Reserves
U.S. crude oil proved reserves declined 4.7 billion barrels (11.8%) from their year-end 2014 level to 35.2 billion barrels at year-end 2015, according to U.S.