Return
2006
2005
2002
2001
Bangladesh
2000
Gulf of Mexico
Hungary
1999
California
1998
Wyoming
1997
Oman
Pau France
1996
Middle East
Pakistan
1995
Syria
1994
Texas
Argentina
1993
Nigeria
1992
Kansas
Louisiana
West Texas
1991
Geyser Basin California
Southern California Gas Well
1989
Nevada
North Sea Norway
1988
Cook Inlet Alaska
North Sea
1986
Lake Maracaibo Venezuela