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Understanding regional-scale structural uncertainty; the onshore Gulf of Corinth rift as a hydrocarbon exploration analogue

Alan Wood, Douglas Paton, Richard Collier and Viki O'Connor
Understanding regional-scale structural uncertainty; the onshore Gulf of Corinth rift as a hydrocarbon exploration analogue (in Geophysical modeling for interpreters, William L. Abriel (prefacer), Rolf Ackermann (prefacer), Vincent Artus (prefacer), Carlos Calderon (prefacer), Feng Chen (prefacer), Steve Danbom (prefacer), Andreas Laake (prefacer), Isabelle Lecomte (prefacer), Joe Mongan (prefacer) and Jamie Rector (prefacer))
Interpretation (Tulsa) (November 2015) 3 (4): SAC35-SAC53

Abstract

A major challenge when exploring for hydrocarbons in frontier areas is a lack of data coverage. Data may be restricted to regional-scale 2D seismic lines, from which assumptions of the 3D geometric configuration are drawn. Understanding the limitations and uncertainties when extrapolating 2D data into 3D space is crucial when assessing the requirements for acquiring additional data such as 3D seismic or exploration wells and of assigning geologically reasonable uncertainty ranges. The onshore Gulf of Corinth Rift provides an excellent analog for rift-scale structural uncertainty in the context of hydrocarbon exploration. We have used seismic forward modeling to explore this area of uncertainty. Synthetic seismic sections have been generated across the rift based upon fault geometries mapped in the field. Comparisons that we made of these sections with the mapped geometries allowed quantification of uncertainties encountered when extrapolating 2D data into three dimensions. We have determined how potential column heights may be severely over and underestimated due to trap integrity, spill point depth, and fault seal ambiguities directly related to fault geometric uncertainty. In addition, fault geometries and linkages also controlled the location of hanging wall synrift reservoirs. Hence, gross reservoir volumes and sediment facies distributions were also significantly influenced by how fault geometries were extrapolated along-strike from 2D to 3D.


ISSN: 2324-8858
EISSN: 2324-8866
Serial Title: Interpretation (Tulsa)
Serial Volume: 3
Serial Issue: 4
Title: Understanding regional-scale structural uncertainty; the onshore Gulf of Corinth rift as a hydrocarbon exploration analogue
Title: Geophysical modeling for interpreters
Author(s): Wood, AlanPaton, DouglasCollier, RichardO'Connor, Viki
Author(s): Abriel, William L.prefacer
Author(s): Ackermann, Rolfprefacer
Author(s): Artus, Vincentprefacer
Author(s): Calderon, Carlosprefacer
Author(s): Chen, Fengprefacer
Author(s): Danbom, Steveprefacer
Author(s): Laake, Andreasprefacer
Author(s): Lecomte, Isabelleprefacer
Author(s): Mongan, Joeprefacer
Author(s): Rector, Jamieprefacer
Affiliation: Shell Global Solutions Netherlands, Rijswijk, Netherlands
Affiliation: Orinda Geophysical, Orinda, CA, United States
Pages: SAC35-SAC53
Published: 201511
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 63
Accession Number: 2016-007526
Categories: Structural geologyEconomic geology, geology of energy sources
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. block diags., sects., 3 tables, sketch maps
N36°15'00" - N38°19'60", E21°00'00" - E23°30'00"
Secondary Affiliation: Rock Solid Images, USA, United StatesKappa Engineering, USA, United StatesIon Geophysical, USA, United StatesCGG, USA, United StatesRice University, USA, United StatesSchlumberger, USA, United StatesNORSAR, NOR, NorwayTullow Oil, GBR, United KingdomLawrence Berkeley National Laboratory, USA, United StatesUniversity of Leeds, GBR, United KingdomScarabus Geological Consulting, GBR, United Kingdom
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201604
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