The Triassic Main Buntsandstein play New prospectivity away from the main fairway

LLeeggeennddaa 0 0 1010 2020 3030 404 0k mkm • The Triassic Main Buntsandstein (MBU) play is ToTpo pV oVloplrpieriheahuasuesne ns ssts t( m(mTVTDVDSSS)S) established in the SNS. Only 20 wells have been ToTpo pL oLwowere rB Bunutnstssts (t d(edpetpht)h) -9-09000 frformom A Arfrafia ei te at la.,l .2, 0210515 2 drilled in the study area (17000 km ) with MBU as -7-1721525 DDEE -5-2552050 primary or secondary target. They were dry, however, -3-373575 3 from well reviews we conclude that 11 of these are -1-510500 TrTiarisassisci cle laedasds invalid tests of the play. TrTiarisassisci cf iefiledlsds gagsas wwelelsll s( T(DTD in i nL oLwowere rG Geremrmanainci cT rTiarisa so ro rd edeepeepre)r) • Three types of leads were identified, located in TeTretriatirayr yv ovloclacnainci cd ydkyekses different parts of the Dutch northern offshore (Fig. 1): TeTretriatirayr yd ydkyekse sU UK K( K(iKrtirotno na nadn dD Donoantaot,o ,1 918958)5) TeTretriatirayr yd ydkyekse sU UK K( U(Undnedrehrihlli,l l,2 02090)9) 1 “classic” leads with proven types of trap, source, StSutduyd ya raeraea seal and reservoir 1 2 leads which may be sourced with HC’s via Tertiary UUKK NNLL volcanic dykes 3 leads with reservoir provenance area to the north

• Up to now, 29 leads have been identified; 2 probabilistic volumetrics result in total P50 GIIP of 80 UUKK T rTiraisassisci cg agsa sfi fieledlsd st htahta ta raere BCM (unrisked). sosuorucrecde df rformom t hteh eC Carabrobnoinfeifreoruosu sv ivaia TeTre�r�arayr yv ovloclacnainci cd ydkyekse.s T. hTeh ed ydkyekses exetxetnedn din itnot ot hteh eD Dutucthc hs escetcotro rw witihth lelaedasd sli glingniningg u upp a alolonngg t htheieri rs tsrtirkiek.e.

Fig. 1. Top Volpriehausen Sst depth map

Southern provenance Reservoir Northern sediment provenance (thin RBMVL, low N/G) • MBU reservoir rocks are present in most of the study area. A05-01 GR DT RHOB B13-01 • Abundance and thickness of aeolian Volpriehausen Sst. decrease from south to north. • Fluvial sands with northern provenance may have developed as reservoir in the northwestern area (Fig. 2). Southern provenance A15-01 (‘classic’ RBMVL, low N/G) Seal F04-01 • Upper Germanic Triassic is a proven seal. • Truncation traps depend on sealing capacity of overlying Jurassic, Cretaceous or Paleogene strata. • Zechstein salt forms side seal of many leads. Southern provenance Southern provenance (thick RBMVL, high N/G) (‘classic’ RBMVL, high N/G) Source & charge D12-04-S1 F15-01 • Source rock presence and maturity are likely in the larg- est part of the study area. See adjacent poster Source rock potential. • In the western area leads may be charged from Carboniferous coals via volcanic dykes, analogous to UK Fig. 2. Regional reservoir architecture - Typical well log response for different types of Volpriehausen Sst (RBMVL) Triassic gas fields.

N A11-01 S

Lead portfolio -1.0 • Up to now, 29 structures have been identified with P50 GIIP ranging from 1 - 9 BCM, total P50 GIIP 80 Tertiary BCM (unrisked) (Fig. 3). Two examples are shown in figures 4 and 5. -2.0 • The leads will be evaluated in more detail, final T Chalk W T

prospects could be part of multi-target exploration s Upper Germanic Trias top Volpriehausen Sst with prospects at various levels. Zechstein Lead Makalu (A11-RB-02) -3.0

Reservoir Volpriehausen sst Makalu

Seal Upper Germanic Trias evaporites and clays Carboniferous Source Scremerston coals 500 m GIIP estimates P50 cases (29 leads, sum 80 BCM) -4.0 Fig. 4. Seismic section through Makalu lead (D082_87E302_mig160001) 10 W E

8 -1.0

6 Tertiary Zechstein -2.0

Trivor )

4 s Chalk ( Number of leads of Number T W T Upper Germanic Trias top Volpriehausen Sst 2 -3.0 Lead Trivor (B16-RB-02)

Reservoir Volpriehausen sst 0 Seal Topseal: Upper Germanic Trias 1 2 3 4 5 6 7 8 9 evaporites and clays. Sideseal: -4.0 Carboniferous 5000 m GIIP [BCM] (unrisked) Zechstein salt Fig. 3. GIIP estimates P50 cases - 29 leads, 80 BCM Source Westphalian coals Fig. 5. Seismic section through Trivor lead (NSR-1065-4)

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