UPDATE: SandRidge Energy Announces $1 Billion Mississippian Joint Venture

SandRidge Energy, Inc.

announced today that it has entered into a Joint Venture ("JV") with a subsidiary of Repsol YPF, S.A., a leading international energy company based in Madrid, Spain. Under the agreement, SandRidge will sell an approximate 25% non-operated working interest, or 250,000 net acres, in the Extension Mississippian play located in Western Kansas and an approximate 16% non-operated working interest, or 113,636 net acres, in its Original Mississippian play. The 363,636 net acres in total will be sold to Repsol for an aggregate transaction value of $1 Billion. Repsol will pay $250 million in cash at closing and the remainder in the form of a drilling carry. In addition to paying for its working interest share of development costs, Repsol will pay an amount equal to 200% of its working interest to fund a portion of SandRidge's cost of development until the additional $750 million drilling carry obligation is satisfied. Based on current drilling expectations, SandRidge anticipates the drilling carry obligation to be satisfied within three years. The JV will exclude all wells and acreage within the associated spacing units spudded prior to January 1, 2012 and all wells and acreage associated with SandRidge Mississippian Trust I. The transaction is expected to close in the first quarter and is subject to certain closing conditions.