Pioneer Southwest Energy Partners L.P. Announces Quarterly Distribution on Common Units

  Pioneer Southwest Energy Partners L.P. Announces Quarterly Distribution on
  Common Units

Business Wire

DALLAS -- January 22, 2013

Pioneer Southwest Energy Partners L.P. (“Pioneer Southwest”) (NYSE:PSE) today
announced a cash distribution of $0.52 per unit for the quarter ended December
31, 2012, on Pioneer Southwest's outstanding common units. This quarterly
distribution equates to $2.08 per common unit on an annual basis.

The distribution is payable February 11, 2013, to unitholders of record at the
close of business on February 4, 2013.

Pioneer Southwest is a Delaware limited partnership, headquartered in Dallas,
Texas, with current production and drilling operations in the Spraberry field
in West Texas. For more information, visit www.pioneersouthwest.com.

Contact:

Pioneer Southwest Energy Partners L.P.
Investors
Frank Hopkins, 972-969-4065
or
Eric Pregler, 972-969-5756
or
Josh Jones, 972-969-5822
or
Media and Public Affairs
Susan Spratlen, 972-969-4018
or
Suzanne Hicks, 972-969-4020