New York's main contract, West Texas Intermediate for April delivery, rose three cents to USD 101.86 in mid-morning trade. Brent North Sea crude for April was up five cents at USD 109.56.
"What investors are really focused on right now is an accurate picture of US demand going forward," David Lennox, resource analyst at Fat Prophets in Sydney, told AFP.
"The US has not been performing as well as we would like considering the fact that it is world's biggest economy and top oil consumer," he said.
Total crude stockpiles in the United States likely rose by about 800,000 barrels in the week to February 21, according to a survey of analysts by The Wall Street Journal.
More From This Section
A rise in stockpiles indicates weak demand in the United States, putting downward pressure on prices.
The US Department of Energy will release official inventory figures later Wednesday.
Analysts will also be monitoring fresh US economic data to assess the impact of months of frigid weather on its tepid recovery.