The gas gathering and compression system will transport natural gas produced by Rex from the Moraine East Area to the Bluestone processing plant.
A subsidiary of MarkWest Energy Partners owns and operates the processing plant.
Rex Energy CEO Tom Stabley said: "This agreement is a critical component of our development strategy for the Moraine East Area, and we are excited to once again be partnering with Stonehenge for these essential services.
"The initial gathering system will provide ample capacity for our 2015 and 2016 development program, and the potential for expansion provides us with greater flexibility to support our future growth in the Moraine East Area."
With an initial storage capacity of 400mmcf/d, the system can be expanded to facilitate future requirements.
The system will include a 20-mile trunkline, various gathering lines and a compressor station.
Rex Energy is an independent oil and gas exploration and production company with operations in the Appalachian and Illinois Basins.
