SandRidge Energy Inc., Oklahoma City, (NYSE: SD) has increased its private placement of 8.75% senior notes due 2020 from $400 million to $450 million fund a portion its acquisition of oil and gas properties in the Permian Basin from Forest Oil Corp.

SandRidge’s E&P activities are in West Texas, the Cotton Valley Trend in East Texas, the Gulf Coast, the Midcontinent and the Gulf of Mexico.