Atlas Pipeline Partners LP (APL) struck a long-term, fee-based agreement with ExxonMobil Corp. subsidiary XTO Energy Inc. to provide gas gathering and processing services for up to an incremental 60 MMcf/d from the Woodford Shale region of Oklahoma to its Velma processing facility in Velma, OK. The agreement supports APL's planned 60 MMcf/d expansion of its Velma system. The cryogenic facility is expected to enter service in mid-2012. XTO would use the expanded facility, which would have capacity of 160 MMcf/d after the expansion is completed.