Marathon Oil Company to Provide Gas Processing and


                         Transportation Services To
                       Seven Heads Group in Celtic Sea


  CORK, Ireland, July 4 /PRNewswire-FirstCall/ -- Marathon International
Petroleum Ireland Limited, a wholly-owned subsidiary of Marathon Oil
Corporation (NYSE: MRO), announced today that it has entered into an agreement
with the Seven Heads group to provide gas processing and transportation
services, as well as field operating services, to the group through Marathon's
existing Kinsale Head facilities in the Celtic Sea.  As part of the agreement,
the Seven Heads group, led by Ramco Oil & Gas Limited (operator), will share
in the costs of operating the Kinsale Head facilities.  The agreement is
subject to the approval of Ireland's Minister of Communications, Marine and
Natural Resources. 
The Seven Heads field, estimated to contain proven and probable natural
gas reserves of approximately 300 billion cubic feet, is located some
35 kilometers to the southwest of Marathon's Kinsale Head field and processing
infrastructure in the Celtic Sea off the southern coast of Ireland.  Under the
terms of the agreement, Marathon will provide firm capacity to process and
transport 60 million cubic feet per day (MMCFD) of Seven Heads gas, with the
ability to increase that up to 100 MMCFD subject to agreement between the
parties. 
The agreement provides for enhanced utilization of Marathon's
infrastructure, while ensuring that both the capital investment required for
the Seven Heads field development and the time to first production are
minimized.  The development also increases Ireland's indigenous gas production
capacity. 
Commenting on the agreement, Fergal Murphy, President of Marathon
International Petroleum Ireland Limited, said, "This agreement enhances the
value and useful life of Marathon's Kinsale Head infrastructure by providing
the means to bring nearby gas fields in the Celtic Sea into commercial
production.  It also complements Marathon's strategy to utilize existing
infrastructure to build an integrated gas business in Ireland and Europe." 
Marathon's Kinsale Head facilities consist of two production platforms,
Alpha and Bravo, located 5 kilometers apart and approximately 50 kilometers
southeast of Cork.  The facilities are currently capable of processing
220 MMCFD of wet gas and this will be increased to 280 MMCFD as a consequence
of the agreement with the Seven Heads group.  Dry gas is transported through a
56 kilometer, 24-inch (600 mm) pipeline to a receiving and metering station at
Inch, County Cork.  From the Inch Terminal, the gas is transferred to the Bord
Gais Eireann transportation system for distribution throughout Ireland. 
The Seven Heads group is comprised of Ramco Oil & Gas Limited, a
subsidiary of Ramco Energy plc, Duke Energy Services Ireland Ltd. (in the
process of transferring its interest in the Seven Heads Field to Ramco Energy
plc), Island Petroleum Developments Limited, Northern Exploration Limited
(recently acquired by Ramco) and Sunningdale Oils (Ireland) Ltd. 
Marathon is a fully integrated energy company engaged in the worldwide
exploration, production and transportation of crude oil and natural gas.  The
company refines, markets and transports petroleum products in the United
States through Marathon Ashland Petroleum LLC, a joint venture company between
Marathon and Ashland, Inc. formed in 1998.  For more information about
Marathon, visit the company's website at www.Marathon.com . 
  This release contains forward-looking statements concerning the processing
and transportation of third-party natural gas production in the Celtic Sea.
This forward-looking information may prove to be inaccurate and actual results
may differ significantly from those presently anticipated.  Factors but not
necessarily all factors that could adversely affect these expected results
include, unforeseen problems associated with the production of third-party
gas, delay in obtaining necessary government approvals, unanticipated changes
in market demand or supply, competition with similar projects, and
environmental or permitting issues.  In accordance with "safe harbor"
provisions of the Private Securities Litigation Reform Act of 1995, Marathon
Oil Corporation (formerly known as USX Corporation), has included in its
Annual Report on Form 10-K for the year ended December 31, 2001, and in
subsequent Forms 10-Q and 8-K, cautionary language identifying important
factors, though not necessarily all such factors, that could cause future
outcomes to differ materially from those set forth in the forward-looking
statements. 
                  MAKE YOUR OPINION COUNT -  Click Here 
           http://tbutton.prnewswire.com/prn/11690X35014246
  

SOURCE  Marathon Oil Corporation 
-0-                             07/04/2002 
/CONTACT:  media relations, Paul Weeditz, +1-713-296-3910, or investor
relations, Ken Matheny, +1-713-296-4114, or Howard Thill, +1-713-296-4140, all
of Marathon Oil Corporation/ 


    /Company News On-Call:  http://www.prnewswire.com/comp/133204.html /
    /Web site:  http://www.marathon.com /


(MRO) 
CO:  Marathon Oil Corporation; Marathon International Petroleum Ireland 


     Limited; Ramco Oil & Gas Limited; Ramco Energy plc; Duke Energy Services
     Ireland Ltd.; Island Petroleum Developments Limited; Northern Exploration


 Limited; Sunningdale Oils (Ireland) Ltd.
ST:  Texas, Ireland
IN:  OIL
SU: 
-0- Jul/04/2002 13:16 GMT