New insights into the North Taranaki Basin from New Zealand’s first broadband 3D surveyFN1

Marjosbet Uzcategui; Malcolm Francis; Wai Tin Vincent Kong; Richard Patenall; Dominic Fell; Andrea Paxton; Tristan Allen

doi:10.1071/EG15090

ASEG-PESA 24th International Geophysical Conference and Exhibition: Special Issue on Case Studies

ISSN: 0812-3985
E-ISSN: 1834-7533

New insights into the North Taranaki Basin from New Zealand’s first broadband 3D surveyFN1
Authors Marjosbet Uzcategui^a,c, Malcolm Francis^b, Wai Tin Vincent Kong^a, Richard Patenall^a, Dominic Fell^a, Andrea Paxton^a and Tristan Allen^a
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^a Schlumberger, Level 5, 256 St George’s Terrace, Perth, WA 6000, Australia. ^b Schlumberger, Schlumberger House, Buckingham Gate, Gatwick, West Sussex RH6 0NZ, UK. ^c Corresponding author. Email: [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 47, Issue ASEG-PESA 24th International Geophysical Conference and Exhibition: Special Issue on Case Studies, Sep 2016, p. 210 - 218
DOI: https://doi.org/10.1071/EG15090
- Received: 08 Sep 2015
- Accepted: 18 Mar 2016
- Published online: 01 Sep 2016

Abstract

[

The North Taranaki Basin contains widespread (2D) seismic coverage and numerous wells. The basin hydrocarbon potential remains unproven. An active petroleum system is confirmed by hydrocarbon shows and non-commercial oil and gas discoveries (Karewa-1 and Kora-1). 3D seismic interpretation and amplitude-versus-offset (AVO) analysis support the renewed potential of the basin.

The Taranaki Basin is the only hydrocarbon producing basin in New Zealand. The North Taranaki Basin has widespread two-dimensional (2D) seismic coverage and numerous wells that have not encountered commercial accumulations. This is attributed to the structural complexity in the central graben and the absence of necessary information to help understand the basin’s evolution. An active petroleum system has been confirmed by hydrocarbon shows and non-commercial oil and gas discoveries (Karewa-1 and Kora-1). A broadband long offset three-dimensional (3D) seismic survey was acquired and processed by Schlumberger in 2013 to evaluate the hydrocarbon potential of the North Taranaki Basin. Innovative acquisition techniques were combined with advanced processing and imaging methods. Raypath distortions and depth uncertainty were significantly reduced by processing through tilted transverse isotropy (TTI) anisotropic Kirchhoff prestack depth migration with a geologically constrained velocity model. The survey provided the necessary information to understand the petroleum system and provide evidence for material hydrocarbon accumulations. In this investigation, we assessed the hydrocarbon potential of the North Taranaki Basin using the newly acquired data. 3D seismic interpretation and amplitude-versus-offset (AVO) analysis support the renewed potential of the basin and demonstrate effectiveness of these technologies that together can achieve encouraging results for hydrocarbon exploration.

]

ASEG

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References

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New insights into the North Taranaki Basin from New Zealand’s first broadband 3D surveyFN1

Exploration Geophysics 47, 210 (2016); https://doi.org/10.1071/EG15090

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Article Type: Research Article

Keyword(s): 3D seismic, AVO, broadband, continuous line acquisition (CLA), depth imaging, interpretation, North Taranaki, technology.

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New insights into the North Taranaki Basin from New Zealand’s first broadband 3D surveyFN1

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