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Book Chapter

Laggan Field 3D geological modelling: case study

By
L. H. Kheidri
L. H. Kheidri
1
Total E&P UK Limited, Crawpeel Road, Altens, Aberdeen AB12 3FG, UK
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F. Cailly
F. Cailly
3
Total E&P Avenue Raymond Poincaré B.P. 761 Pointe Noire, République du Congo
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K. Jones
K. Jones
1
Total E&P UK Limited, Crawpeel Road, Altens, Aberdeen AB12 3FG, UK
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A. De Senneville
A. De Senneville
2
Total E&P S.A., 2 place de la Coupole, La Defense, Paris 92078, France
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R. Gray
R. Gray
1
Total E&P UK Limited, Crawpeel Road, Altens, Aberdeen AB12 3FG, UK
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Published:
January 01, 2014

Abstract

Drilling of Laggan development wells commenced in summer 2013 and finalization of well locations required updated reservoir models, fully incorporating the 2009 baseline seismic. Consequently, geomodelling workflows have been developed based on the 3D seismic, petrophysical and production test data. The reservoir model building methodology for Laggan consists of the following steps: (1) construction of a classical structural framework using seismic interpreted fault sticks, top reservoir depth surface and the overall reservoir thickness map estimated from seismic data; (2) building of zones model integrating well data, seismic and sedimentological concepts; and (3) generation of a 3D facies and petrophysical model constrained by seismic and well data, including well test results to calibrate the permeability.

A reasonable match of the well test data was achieved without any major adjustments to the reservoir model. This methodology has led to the construction of a robust reservoir description, capturing the geological knowledge of the turbidite system and constrained by well and seismic data.

The new Laggan model is now considered ‘fit for purpose’ for well locations update, well type and well number confirmation and development of the Reservoir Management Plan.

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Contents

Geological Society, London, Special Publications

Hydrocarbon Exploration to Exploitation West of Shetlands

S. J. C. Cannon
S. J. C. Cannon
Statoil (UK) Ltd
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D. Ellis
D. Ellis
Statoil (UK) Ltd
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Geological Society of London
Volume
397
ISBN electronic:
9781862396739
Publication date:
January 01, 2014

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