Iraq is scheduled to open its first postwar bidding for oil service contracts on Monday. International oil companies were expelled by Saddam Hussein more than 30 years ago. The companies that qualified for the bidding, along with the fields and reserves, are compiled below.

UNITED STATES: Chevron, ConocoPhilips, Exxon Mobil, Hess Corp., Marathon International Petroleum Ltd., and Occidental Petroleum Corp.

United Kingdom: BP Group PLC.

Japan: Inpex Holdings Inc., Japex and Nippon Oil Corp.

Australia: BHP Billiton Ltd. and Woodside Petroleum Ltd.

China: China's CNOOC Ltd., CNPC International Ltd., Sinochem International Co. Ltd., and Sinopec Shanghai Petrochemical co. Ltd.

Italy: Edison International SPA and Eni.

Russia: JSC Lukoil and JSC Gazprom Neft.

France: Total SA.

South Korea: Korea Gas Corp).

Spain: Repsol YPF SA.

Norway: StatoilHydro ASA.

Netherlands: Royal Dutch Shell.

Canada: Nexen Inc.

Denmark: Maersk.

India: ONGC Ltd.

Malaysia: Petronas Gas BHD.

Indonesia: PT Pertamina.

The six state-run oil firms that have been added are Turkish Petroleum Corporation (TPAO), Algeria's Sonatrach, PetroVietnam, Angola's Sonangol SA, Pakistan Petroleum Ltd., and Petroleum Authority of Thailand.

OIL AND GAS FIELDS

BASRA OIL FIELDS:

Rumaila: The field is made up of two separate fields; North and South Rumaila. Together they have an estimated of almost 17.8 billion barrels of oil in reserves. It currently produces slightly over 1 million barrels a day, and its production target is about 1.8 million barrels per day.

West Qurna Stage 1: It has estimated reserves of 8.6 billion barrels, and currently produces about 280,000 barrels a day. The production target is slightly over 600,000 barrels per day.

Zubair: It holds an estimated 4.1 billion barrels of oil. Its current production is about 230,000 barrels per day and its target production is slightly over 400,000 barrels per day.

MISSAN OIL FIELDS:

They are three adjacent fields offered as one group. Total daily production ranges from 100,000 to 110,000 barrels per day with target output at about 300,000 barrels per day.

Fauqa (or Fakkah): Almost 1.55 billion barrels of oil in reserves.

Buzurgan: About 612 million barrels of oil in reserves.

Abu Gharab: About 454 million barrels of oil in reserves.

KIRKUK OIL FIELDS:

Kirkuk: It has estimated reserves of almost 8 billion barrels. Current production is slightly over 400,000 barrels per day. Target production is about 625,000 barrels per day.

Bai Hassan: It has almost 2.4 billion barrels of oil in reserves. Current daily production is about 150,000 barrels per day. Target production is about 230,000 barrels per day.

GAS FIELDS:

Akkas Field in Anbar Province:Undeveloped. At least 2.15 trillion cubic feet of reserves and potential production of 500 million cubic feet per day.

Mansouria in Diyala Province: Undeveloped. An estimated 3.3 trillion cubic feet of reserves with production potential of 330 million cubic feet a day.