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Prestack inversion and multiattribute analysis for porosity, shale volume, and sand probability in the Havert Formation of the Goliat Field, southwest Barents Sea

Honore Dzekamelive Yenwongfai, Nazmul Haque Mondol, Jan Inge Faleide, Isabelle Lecomte and Johan Leutscher
Prestack inversion and multiattribute analysis for porosity, shale volume, and sand probability in the Havert Formation of the Goliat Field, southwest Barents Sea
Interpretation (Tulsa) (May 2017) 5 (3): SL83-SL101

Abstract

An integrated innovative multidisciplinary approach has been used to estimate effective porosity (PHIE), shale volume (V (sub sh) ), and sand probability from prestack angle gathers and petrophysical well logs within the Lower Triassic Havert Formation in the Goliat field, Southwest Barents Sea. A rock-physics feasibility study revealed the optimum petrofacies discriminating ability of extended elastic impedance (EEI) tuned for PHIE and V (sub sh) . We then combined model-based prestack inversion outputs from a simultaneous inversion and an EEI inversion into a multilinear attribute regression analysis to estimate absolute V (sub sh) and PHIE seismic attributes. The quality of the V (sub sh) and PHIE prediction is shown to increase by integrating the EEI inversion in the workflow. Probability distribution functions and a priori petrofacies proportions extracted from the well data are then applied to the V (sub sh) and PHIE volumes to obtain clean and shaly sand probabilities. A tectonic-controlled point-source depositional model for the Havert Formation sands is then inferred from the extracted sand bodies and the seismic geomorphological character of the different attributes.


ISSN: 2324-8858
EISSN: 2324-8866
Serial Title: Interpretation (Tulsa)
Serial Volume: 5
Serial Issue: 3
Title: Prestack inversion and multiattribute analysis for porosity, shale volume, and sand probability in the Havert Formation of the Goliat Field, southwest Barents Sea
Affiliation: Statoil, Oslo, Norway
Pages: SL83-SL101
Published: 201705
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 32
Accession Number: 2017-085798
Categories: Economic geology, geology of energy sourcesApplied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. chart, sects., strat. cols., 4 tables, sketch maps
N71°00'00" - N71°30'00", E20°00'00" - E21°00'00"
Secondary Affiliation: University of Oslo, NOR, NorwayUniversity of Bergen, NOR, NorwayEni Norge, NOR, Norway
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States
Update Code: 201745
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