payment, or a combination of cash and borrowings?

"On August 5, 2009, PXP and Chesapeake entered into an amendment that provides for PXP to pay $1.1 billion of an estimated $1.25 billion carry balance on September 29, 2009."

what is expected boe in reserves they will acquire, is this part of current 290m boe reserve estimate?

thks for any feedback!