BHP BILLITON ANNOUNCES KNOTTY HEAD DISCOVERY20 Dec 2005
Bhp Billiton Plc - Bhp Billiton Announces Knotty Head Discovery In Gulf Of      
Mexico                                                                          
BHP Billiton Plc                                                                
Share code:    BIL                                                              
Isin:          GB0000566504                                                     
NEWS RELEASE                                                                    
Date       20 December 2005                                                     
Number     52/05                                                                
BHP BILLITON ANNOUNCES KNOTTY HEAD DISCOVERY IN GULF OF MEXICO                  
BHP Billiton today announced a discovery at the Knotty Head exploration well    
located in Green Canyon Block 512, approximately 170 miles southeast of New     
Orleans in the Gulf of Mexico.                                                  
Knotty Head is believed to be the deepest hydrocarbon discovery to date in the  
Gulf of Mexico, located in water depths of approximately 3,500 feet, with the   
initial wellbore drilled to total depth of more than 34,000 feet.  The well     
encountered more than 500 feet of net oil pay.                                  
"This is a very encouraging result," said BHP Billiton Group President Energy,  
Philip Aiken.  "We will be working with our partners to determine next steps,   
including the drilling of a sidetrack from this wellbore to further delineate   
the lateral extent of the oil sands we"ve found thus far."                      
BHP Billiton holds a 25 percent interest in Knotty Head.  Other partners include
Chevron, Anadarko Petroleum Corporation and Nexen Petroleum USA Inc., a wholly  
owned subsidiary of Nexen Inc.  Each partner holds a 25 percent interest in the 
block.  Chevron is the operator of the well, which is being drilled with the    
Transocean drillship Discoverer Spirit and Nexen is the designated operator of  
the prospect.                                                                   
BHP Billiton has a significant deepwater position in the Gulf of Mexico with    
interests in nearly 450 lease blocks.  Assets in the Gulf of Mexico include Mad 
Dog, which commenced production earlier this year, and the Atlantis and Neptune 
fields, which are currently in development. The company also has deepwater      
discoveries under appraisal at Cascade, Chinook and Shenzi.                     
Further information on BHP Billiton can be found on our Internet site:          
http://www.bhpbilliton.com                                                      
Australia                          United Kingdom                               
Jane Belcher, Investor Relations   Mark Lidiard, Investor & Media               
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Samantha.Evans@bhpbilliton.com     Ariane.Gentil@bhpbilliton.com                
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Tracey Whitehead, Investor & Media Alison Gilbert, Investor Relations           
Relations                          Tel: SA +27 11 376 2121 or UK +44            
Tel: US +1 713 599 6100 or UK +44  20 7802 4183                                 
20 7802 4031                       email:                                       
Mobile: +44 7917 648 093           Alison.Gilbert@bhpbilliton.com               
email:                                                                          
Tracey.Whitehead@bhpbilliton.com                                                
Date: 20/12/2005 02:25:58 PM Produced by the JSE SENS Department