A Halliburton Co. unit will plead guilty to destroying tests on cement work done on a BP Plc-owned oil well that exploded and caused the 2010 Gulf of Mexico oil spill, federal prosecutors said.

Officials of Halliburton Energy Services Inc., which worked on BP’s Macondo well, will plead guilty on the unit’s behalf to one count of destroying evidence for failing to preserve computer models examining the final cement job on the well after the April 2010 explosion that killed 11 workers and sent millions of barrels of oil pouring into the gulf, the U.S. Justice Department said yesterday in a statement.