Draupner HTZ
A circle radius 7 NM on RUDOK (581117N 0022816E)
Gjøa HTZ
A circle radius 7 NM on Gjoa (611954N 0035342E)
Gudrun HTZ - Withdrawn
Heidrun HTZ
Circles radius 7 NM on Heidrun A (651932N 0071857E) - Heidrun B (652036N 0072202E), circles tangentially connected
Heimdal HTZ - Withdrawn
Johan Sverdrup HTZ
Circles radius 7 NM on Ivar Aasen (585520N 0021152E) - Johan Sverdrup (585007N 0023244E), circles tangentially connected, then to 584347N 0013337E - 585642N 0013702E
Martin Linge HTZ
Circles radius 7 NM on Martin Linge A (603027N 0020053E) - Martin Linge B (602954N 0020424E), circles tangentially connected. Limited to the west by median line
Norne A HTZ
Circles radius 7 NM on NOSVA (660137N 0080512E), limited to the west by median line
Oseberg HTZ
Circles radius 7 NM on Oseberg South (602332N 0024744E) - Oseberg C (603628N 0024628E) - Veslefrikk A (604656N 0025346E) - Troll C (605309N 0033635E) - Troll A (603842N 0034329E), circles tangentially connected
Skarv HTZ
A circle radius 7 NM on Skarv (654159N 0073903E)
Sleipner HTZ
Circles radius 7 NM on Randgrid (583500N 0014358E) - Sleipner A (582200N 0015425E), circles tangentially connected, then to 581923N 0013452E - 582546N 0012854E - 583928N 0013228E
Åsgard HTZ
Circles radius 7 NM on Kristin (645939N 0063302E) - Asgard A (650351N 0064332E) - Asgard B (650636N 0064722E) - Asgard C (650752N 0065151E), circles tangentially connected
Aasta Hansteen HTZ A circle radius 7 NM on Aasta Hansteen (670408N 0070550E)
NEW Alvheim HTZ A circle radius 7 NM on Alvheim (593400N 0015930E)
Balder HTZ Circles radius 7 NM on Balder A (591125N 0022315E) - Ringhorne (591600N 0022700E) - Grane (590954N 0022912E), circles tangentially connected
Draupner HTZ A circle radius 7 NM on RUDOK (581117N 0022816E)
Gjøa HTZ A circle radius 7 NM on Gjoa (611954N 0035342E)
Gudrun HTZ - Withdrawn
Heidrun HTZ Circles radius 7 NM on Heidrun A (651932N 0071857E) - Heidrun B (652036N 0072202E), circles tangentially connected
Heimdal HTZ - Withdrawn
Johan Sverdrup HTZ Circles radius 7 NM on Ivar Aasen (585520N 0021152E) - Johan Sverdrup (585007N 0023244E), circles tangentially connected, then to 584347N 0013337E - 585642N 0013702E
Martin Linge HTZ Circles radius 7 NM on Martin Linge A (603027N 0020053E) - Martin Linge B (602954N 0020424E), circles tangentially connected. Limited to the west by median line
Norne A HTZ Circles radius 7 NM on NOSVA (660137N 0080512E), limited to the west by median line
Oseberg HTZ Circles radius 7 NM on Oseberg South (602332N 0024744E) - Oseberg C (603628N 0024628E) - Veslefrikk A (604656N 0025346E) - Troll C (605309N 0033635E) - Troll A (603842N 0034329E), circles tangentially connected
Skarv HTZ A circle radius 7 NM on Skarv (654159N 0073903E)
Sleipner HTZ Circles radius 7 NM on Randgrid (583500N 0014358E) - Sleipner A (582200N 0015425E), circles tangentially connected, then to 581923N 0013452E - 582546N 0012854E - 583928N 0013228E
Åsgard HTZ Circles radius 7 NM on Kristin (645939N 0063302E) - Asgard A (650351N 0064332E) - Asgard B (650636N 0064722E) - Asgard C (650752N 0065151E), circles tangentially connected
Withdrawn: Heimdal (Offshore Helidekk) - ENHM