[1/2] The sun is seen behind a crude oil pump jack in the Permian Basin in Loving County, Texas, U.S., November 22, 2019. REUTERS/Angus Mordant/File PhotoSINGAPORE, April 13 (Reuters) - Oil prices retreated on Thursday after rising for two sessions, with investors still showing lingering concern over a possible U.S. recession and weaker oil demand. The Biden administration plans to refill the U.S. Strategic Petroleum Reserve soon, and hopes to do it at lower oil prices, U.S. Energy Secretary Jennifer Granholm said on Wednesday. Still, the oil market was jolted higher two weeks ago after the Organization of the Petroleum Exporting Countries (OPEC) and allies such as Russia agreed to curtail output. As a result, the global oil market could see tightness in the second half of 2023, which would push prices higher, said Fatih Birol, executive director of the International Energy Agency.

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