F-quadrants Dick Stegers, Msc 23-05-2016 EBN: Dutch Exploration - - PowerPoint PPT Presentation

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F-quadrants Dick Stegers, Msc 23-05-2016 EBN: Dutch Exploration - - PowerPoint PPT Presentation

Feb 15, 2023 339 likes •491 views

2D Seismic analysis of Chalk play potential in the upper D, E and F-quadrants Dick Stegers, Msc 23-05-2016 EBN: Dutch Exploration Day Economics Exploration, like any other business, has one major goal: making profit Oil costs $/BBL

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SLIDE 1

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

23-05-2016

EBN: Dutch Exploration Day

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SLIDE 2

Chalk

Economics

  • Exploration, like any other business, has one

major goal: making profit

20.00 30.00 40.00 50.00 60.00 70.00 80.00 90.00 100.00 110.00 120.00 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 1-1 $/BBL

Oil costs $/BBL

Brent Crude Light Crude

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SLIDE 3

Chalk

Economics

  • Exploration, like any other business, has one

major goal: making profit

20.00 30.00 40.00 50.00 60.00 70.00 80.00 90.00 100.00 110.00 120.00 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 1-1 $/BBL

Oil costs $/BBL

Brent Crude Light Crude

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SLIDE 4

Chalk

Economics

  • Exploration, like any other business, has one

major goal: making profit

20.00 30.00 40.00 50.00 60.00 70.00 80.00 90.00 100.00 110.00 120.00 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 1-1 $/BBL

Oil costs $/BBL

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

R² = 0.9606

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SLIDE 5

Chalk

Background

Discovery F17-NE

4-12-’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

  • il 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

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SLIDE 6

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

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SLIDE 7

Chalk 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

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Chalk

Seismic reprocessing: Vintage

W E Reprocessed seismic data

  • Improved signal-to-noise ratio
  • Improved fault recognition
  • Narrowed steep features
  • Widened rimsynclines
  • Improved reflection continuation
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SLIDE 9

Chalk

Seismic reprocessing: Reprocessed

W 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
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SLIDE 10

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

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SLIDE 11

Chalk Map Top Chalk

EBN 3D AmsterdamPG 2D

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SLIDE 12

Chalk

Leads

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

Area (km2) Height (ms) Nearby well Well result Bright spot Structure

16 123 >10 km N/A

  • Anticline

30 186 D12-05-S1 Gas shows

  • Anticline

12 161 D12-04-S1 Gas shows

  • Collapsed AC

11 92 E04-01 Gas shows

  • Anticline

10 75 E04-01 Gas shows

  • Anticline

26 160 >10 km N/A

  • Anticline

15 70 >10 km N/A + Anticline 29 56 F04-01 Dry + Flat AC 22 160 F04-03 Gas shows + Anticline 34 149 >10 km N/A

  • Anticline

12 38 >10 km N/A

  • Flat AC

13 70 E09-02 Dry + Anticline 38 121 E09-02 Dry

  • Flat AC

22 62 E09-03 Dry

  • Flat AC

30 81 E11-01 Gas

  • Flat AC

21 111 E10-03-S2 Oil&Gas shows

  • Anticline

11 75 E09-02 Dry + Anticline 18 84 E12-03 Gas + Anticline 12 55 E12-01 Dry + Anticline 70 405 F04-02A Gas shows + Steep collapsed AC 65 57 F04-03 Gas shows + Flat AC 20 117 F07-01 Dry ++ Collapsed AC 28 861 F11-03 Oil shows ++ Steep AC 45 81 F08-02 Oil shows + Flat AC 63 412 F11-03 Oil shows ++ Steep AC 29 339 F10-03 Gas shows + Steep AC 21 221 F10-03 Gas shows + Steep AC 10 209 F11-02 Dry + Steep AC 8 32 >10 km N/A

  • Flat AC

9 23 E06-01 Dry

  • Flat AC

9 68 >10 km N/A

  • Anticline

6 44 >10 km N/A

  • Anticline

6 81 >10 km N/A

  • Anticline

6 65 E10-01 Oil shows

  • Anticline

10 33 E10-02 Oil&Gas shows

  • Flat AC

6 15 F04-01 Dry + Flat AC 5 198 F05-02 Dry + Steep AC 5 44 F07-01 Dry + Collapsed AC

0.0 100.0 200.0 300.0 400.0 500.0 600.0 700.0 800.0 900.0 1000.0 0.0 20.0 40.0 60.0 80.0

Column Height (ms) Area (km2)

F02-Hanze

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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

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SLIDE 14

Down to earth

Thank you for your attention!

D.P.M. Stegers

d.stegers@amsterdampg.com www.amsterdampg.com