Geology – Micaela Weeks, BPXA - Alaska Oil and Gas Association

Petroleum Geology of the North Slope
Micaela Weeks
Production Geologist
BP Exploration Alaska
Petroleum Geology of the North Slope
• North Slope Oil & Gas Resources
• Elements needed for a Petroleum Field
North Slope Oil & Gas Resources
Milne Pt.
Beaufort Sea
Viscous & Heavy Oil
Northstar
Pt. McIntyre
Niakuk
Light Oil
Gas/Condensate
Endicott
Kuparuk
Viscous &
Heavy
Tarn
Meltwater
Liberty
Prudhoe
Bay
Pt. Thompson
Badami
North Slope Subsurface
Cartoon
West End of Prudhoe Bay
Schrader
Bluff
Kuparuk
Ivishak
Milne Pt.
Beaufort Sea
Northstar
Pt. McIntyre
Niakuk
k
Viscous &
Heavy
Prudhoe
Bay
E
North Slope Reservoir Rocks
West End of Prudhoe Bay
Schrader
Bluff
Kuparuk
Ivishak
N
S
Camden
Mackenzie
k
e
Sa
ston
st
We
Mud
e
l
il
Colv
Wall
Polaris, West Sak, Milne Pt., Orion,
Tarn, Meltwater, Tabasco
Shale Wall
Shale
Nan.
Torok
HRZ
t
Rif
Up
Break
FOR
BEAU
Co
lu
115
mb
ia
n
HRZ
k
rua
p ik
Ok
Upper Shale
Kup “C” and equiv.
Kup A & B
Alpine
UPPER KINGAK
Nuiqsut
Simpson
Pt. Thomson
Alpine, Fiord
Kingak
Barrow
215
Sag River
Shublik
ELLESMERIAN
CARBONIFEROUS PERMIAN TRIASSIC
Lower Kingak
DEVONIAN
Kuparuk, Pt. McIntyre, Niakuk,
Milne Pt., Aurora, Borealis, Palm, Midnight Sun,
Nechelik
T
JURASSIC
CRETACEOUS
Badami
Ugnu
ide
0
BR
OO
KIA
La
ram
N
TERTIARY
North Slope Fields & Source Rocks
sm
le
El
Shublik
Eileen
Ivishak
Kavik
Prudhoe Bay, Northstar, Sag Delta North, Eider
Echooka
Lisburne
Lisburne Lisburne Lisburne
Kayak
Kekiktuk
Hunt
355
Prudhoe Bay, Milne Pt.
Fork
Endicott, Liberty
Kekiktuk Coals (gas)
Kanayut
Producing Fields and planned production
n
ia
er
Franklinian
Oil source rock
Gas source rock
Not all oil is the same…
Elements needed to make a Petroleum Field
• Already discussed:
• Reservoir rock (container to hold petroleum)
• Source rock (where the petroleum comes from)
• Other Elements needed:
Migration (have to move Trap/Seal (how to keep petroleum from source to reservoir)
oil &/or gas in reservoir rock)
How to get Petroleum out of the ground…
Drilling Wells
Ultra Extended Reach
Vertical
Industry Drilling Envelope
Multi‐lateral Horizontal
Wells in the Liberty Field will have a horizontal departure of 6‐8 miles. This is equivalent to the distance from the Port of Anchorage to Huffman Road.