Amsterdam Petroleum Geoscience 2D Seismic Analysis of Chalk play potential

2D Seismic analysis of Chalk play potential in the upper D, E and F-quadrants

Dick Stegers, Msc

Q2-2016

Chalk

Economics• Exploration, like any other business, has one

major goal: making profit

1/10 31/12 1/4 2/7 1/10 31/12 2/4 2/7 2/10 1/1 1/4 2/7 1/10 1/120.00

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Oil costs $/BBL

Brent Crude

Light Crude

$/BB

L

Chalk

Economics• Exploration, like any other business, has one

major goal: making profit

1/10 31/12 1/4 2/7 1/10 31/12 2/4 2/7 2/10 1/1 1/4 2/7 1/10 1/120.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

110.00

120.00

Oil costs $/BBL

Brent Crude

Light Crude

$/BB

L

Chalk

Economics• Exploration, like any other business, has one

major goal: making profit

1/10 31/12 1/4 2/7 1/10 31/12 2/4 2/7 2/10 1/1 1/4 2/7 1/10 1/120.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

110.00

120.00

Oil costs $/BBL

Brent Crude

Light Crude

$/BB

L

y = 3E-14x6 - 7E-09x5 + 0.0008x4 - 43.077x3 + 1E+06x2 - 2E+10x + 2E+14R² = 0.9606

Chalk

BackgroundDiscovery F17-NE4-12-’12: Wintershall announces an oil discovery in exploration licence F17a in the Dutch North Sea. Exploration well F17-10 found a Late Cretaceous Chalk reservoir of good quality containing crude oil. Preliminary resource estimates indicate a potential of at least 30 million barrels recoverable oil with a more than significant upside.

EBN study 2013:• ‘Chalk in the northern Dutch offshore is

underexplored’

• Non-exclusive 3D-seismic in DEF-quadrants shot in 2011/2012 with Fugro

F17

Chalk

Study Area

• Focus on open acreage

• Regional 2D dataset

• Eleven different surveys• 80’s, 90’s, 00’s• ~350 lines

• Area of ~6.500 km2

F02 Hanze

Chalk

Chalk study

Chalk study

Reprocessing seismic data

Defining and classifying leads

Re-interpretation Welltops

Geological study

Interpreting seismic data

Grids & thickness maps

Analysis analogues

HC analysis well documents

Chalk

Seismic reprocessing: VintageW E

Reprocessed seismic data

• Improved signal-to-noise ratio

• Improved fault recognition

• Narrowed steep features

• Widened rimsynclines

• Improved reflection continuation

Chalk

Seismic reprocessing: ReprocessedW E

CK

SL

ZE KN

N

Reprocessed seismic data

• Improved signal-to-noise ratio

• Improved fault recognition

• Narrowed steep features

• Widened rimsynclines

• Improved reflection continuation

Chalk

Map Top Chalk

E04 E05 E06 F04 F05

E07

E10

D09

D12

-600-800-1000-1200-1400-1600-1800-2000-2200

Elevation time (ms)

F07

F10

Chalk

Map Top Chalk

EBN 3D

AmsterdamPG 2D

Chalk

Leads• Polygons of leads based on closing contours• 28 structures >10 km2 ; 9 structures 5-10km2

Area (km2) Height (ms) Nearby Well result Bright spot Structure 16 123 N/A - Anticline30 186 Gas shows - Anticline12 161 Gas shows - Collapsed AC11 92 Gas shows - Anticline10 75 Gas shows - Anticline26 160 N/A - Anticline15 70 N/A + Anticline29 56 Dry + Flat AC22 160 Gas shows + Anticline34 149 N/A - Anticline12 38 N/A - Flat AC13 70 Dry + Anticline38 121 Dry - Flat AC22 62 Dry - Flat AC30 81 Gas - Flat AC21 111 Oil&Gas shows - Anticline11 75 Dry + Anticline18 84 Gas + Anticline12 55 Dry + Anticline70 405 Gas shows + Steep collapsed AC65 57 Gas shows + Flat AC20 117 Dry ++ Collapsed AC28 861 Oil shows ++ Steep AC45 81 Oil shows + Flat AC63 412 Oil shows ++ Steep AC29 339 Gas shows + Steep AC21 221 Gas shows + Steep AC10 209 Dry + Steep AC8 32 N/A - Flat AC9 23 Dry - Flat AC9 68 N/A - Anticline6 44 N/A - Anticline6 81 N/A - Anticline6 65 Oil shows - Anticline

10 33 Oil&Gas shows - Flat AC6 15 Dry + Flat AC5 198 Dry + Steep AC5 44 Dry + Collapsed AC

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F02-Hanze

Undrilled!

Conclusions• Still high untapped potential in northern Dutch offshore• Reprocessed 2D-seismic data significantly improves quality• Regional analysis with 2D seismic gives an excellent indication of HC-

potential different structures• Deliverables project: Geological report, 2D-seismic dataset and Petrel-project:

Interpreted re-processed seismic dataset All wells incl. LAS-files and TD-tables Well top re-interpretation Well log analysis Polygon set of leads Maps of reservoir & seal Regional maps by TNO

Chalk

Down to earth

Thank you for your attention!

D.P.M. [email protected]

www.amsterdampg.com