3D-seismic data position - nlog.nl prospex2011.pdf · 3D-seismic data position Poster 7 Prospex...

3D-seismic data position

Post

er 7

Pro

spex

201

1 m

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For information on Exploration and Production issues and E&P data see the Netherlands Oil and Gas Portal www.nlog.nl & www.ebn.nl

3D seismic data coverage of the Netherlands

Pre-view of Fugro’s new long cable 3D spec surveyThe NL-DEF-3D long cable spec survey area covers some 8000km2. It is amongst the largest speculative 3D survey in Europe. It fills one of the last large gaps in the Dutch offshore 3D-coverage. The survey is located in an under-explored part of the Dutch offshore where 3D long cable seismic is lacking. Interpretation of the new survey will provide new geological information and hydrocarbon concepts that might reduce exploration risks in the area. EBN is the first company that purchased a license for the entire survey. The survey is to be completed in 2012.

The survey is to be completed in 2012.The acquisition details are:• 3modernseismicvessels• 8to12streamer• 7500to8100meterstreamerlength• Streamerseparation:100m•Numberofsources:2• Sourceseparation:50m• Shotpointinterval:25m

The data are processed through a modern time processing flow including the latest updated 3DSRMEprograms,advancedde-noisemethods,Kirchhofftimemigrationandthemostrecentbinning,interpolationandfoldharmonizationmethodsdevelopedbyFugroSeismicImaging.Deliverables will include velocity volumes and angle stacks and gathers.

On the first preliminary processing results the various structural domains allready become evident.TheonlapofDevonianandCarboniferousseriesontotheElbowSpitHighcanbeseen. The assymetric configuration of the Central Graben with the thick Upper Jurassic - LowerCretaceousseriesintherimsynclinesofprominentsaltdomesisclear.Moreadvancedprocessing will further enhance the image of the deep strata providing the material for generating robust play and prospect evaluation maps.

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L16

L14L13

L12L10

L08 L09L07

L05 L06L04

L02 L03L01

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K11

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F17 F18F16

F14 F15F13

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F12F10

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K03K02K01

E18E17E16

E15E14E13

E12E10

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E06E05E04

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B17B16A18A17

B13A15A14

Q01

A12

A08

G18G17G16

G13 G14

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E01

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NL-DEF 3D

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54°0'0"N

53°0'0"N

52°0'0"N

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0 50 Km

Overview 3D seismic surveys

shot in 2010

shot between 1976 - 2009

3D seismic survey coverage onshore and offshore the Netherlands. Seismic data be-comes public after 5 years in the Netherlands. Public data (post-stack) can be purchased at TNO (www.nlog.nl). Various vendors offer large, regional merges of the public seismic data.

2011 Fugro, long cable, spec 3D-survey

Expl. Well

Gas Field

Oil Field

JURRASSIC ELEMENTS

High, No Zechstein

Structural High

Platform

Main Basin

Minor Basin

RESERVOIRS

Tertiairy

Chalk

Lower Cretaceous

Jurrassic

Triassic

Zechstein

Rotliegend

Carboniferous

Regional structural geology of the area indicating the Cleaver Bank High, Elbow Spitbhigh as well as the Step and Central Graben

Base Cenozoic

Base Cretaceous

Rotliegend Fm

Saalian Unconformity

Upper Carboniferous (Silesian?)

Top Salt/Base Triassic

Base CenozoicBase Cretaceous

Top Salt

Rotliegend Fm

Upper Graben Fm (Oxfordian, Late Jurassic)

Lower Graben Fm (Callovian, Mid Jurassic)

Lower Buntastein Fm (Lower Triassic)

Base Cenozoic

Base Cretaceous

Top Salt/Base Triassic

Rotliegend Fm

Saalian Unconformity

Yordale Fm

Tayport Fm

Kyle Fm?

Reef?

Base Cenozoic

Base Cretaceous

Top Salt

Rotliegend Fm

Seismic line over the Cleaverbank High

E-W line through Central Graben and Step Graben

Seismic line from the Cleaverbank High to-wards the Elbow Spit High