Extending the Dinantian clastics play the Dutch northern

Exploring Paleozoic strata
in the northern Dutch offshore
Extending the Dinantian clastics play the Dutch northern territory
•Development of UK Breagh field shows potential of
R
S
•
S
R
R
•
•
Dinantian clastics play.
Play underexplored, preliminary results show the potential of the play in the study area.
A new tectonic framework has been developed
(see poster& presentation We-N103-07) to predict
the occurrence of Lower Carboniferous source and
reservoir rocks.
A detailed play fairway analysis is forthcoming.
S
The Dinantian (Early Carboniferous) clastics play. S – Source Rock,
R – Reservoir. Seals are provided by Zechstein salt, Silverpit Fm.
and intra-Carboniferous seals.
A new chance for the Zechstein-2 play
•Proven play in Southern Permian Basin - production in Poland, Germany and the
DK
UK
DE
NL
Mid North Sea High
•
•
•
Netherlands.
Presence of Zechstein-2 Carbonates in study area shown by wells and seismic.
Possibly charge from Dinantian Scremerston coals and/or Zechstein carbonates.
Cluster of leads with sizable volumes, nearby infrastructure.
?
Tertiary
?
Chalk
Lower Cretaceous
Basal Zechstein Unit
including Zechstein-2 Carbonate Triassic
El
bo
Pre-Zechstein
w
younger Zechstein
including Zechstein-2 Halite
Sp
it
Hi
W
E
gh
Facies and present-day
not present
basal Zechstein unit
basinal facies
platform / slope facies
oil fields
Zechstein build-up
gas fields
Carbonate platform / slope
Reservoir
Karstified / fractured limestone
Seal
Overlying Zechstein strata (clays, salts)
Overlying Cretaceous - Jurassic shales, tight Chalk
distribution of the
well penetrations
Trap
Zechstein-2 Carbonate Member,
Source
Zechstein intra-platform (oil / condensate, lateral migration)
Carboniferous coals (gas, vertical migration)
modified from Geluk, 2007
Positive indications for source rocks
Gas show
Oil show
1D Basin Modelling
Gas ﬁeld
Oil ﬁeld
Middle/Upper Jurassic
Lower Jurassic
Zechstein
Westphalian
Namurian
Dinan�an
Chalk
0
Projec�on: UTM, Zone 31N
Map datum: ED50
(c) EBN B.V.
50 km
•Hydrocarbon shows outside areas with proven source
•
•
•
rocks and also in pre-Tertiary strata.
Some non-biogenic signatures are identified in Tertiary
deposits (Swint, 1999).
This strongly suggests that other source rocks are
present and mature in the area.
1-D basin modelling results show that Zechstein-2
carbonate, Scremerston and Yoredale coals, and
Namurian source rocks are all currently at maximum
burial. Hydrocarbon generation picks up in the
Tertiary with a strong peak in the mid Miocene.
Carboniferous
sandstones
Dinantian (Scremerston)
Distribution of potential source
Hydrocarbon systems in the Netherlands, modified after Wong,
rocks in Northern Offshore and
Batjes and de Jager, 2007
hydrocarbon shows in wells.

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