Deepwater Taranaki Basin, New Zealand—New Interpretation and Modelling Results for Large Scale Neogene Channel and Fan Systems: Implications for Hydrocarbon Prospectivity

Grahame, Jarrad

doi:10.1190/ice2015-2209985

Cited by 8 publications

(3 citation statements)

References 6 publications

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“…The geologic model for the Taranaki Mesozoic-Cenozoic Reservoirs AU is for oil and gas to have been generated from coal and shale source rocks and to have migrated into clastic reservoirs ranging from fluvial, alluvial, deltaic, shelf, and deep-water sandstones (Kroeger and others, 2019) and platformmargin carbonate reservoirs. The Deepwater Taranaki-Northland Reservoirs AU was defined to encompass clastic reservoirs beyond the shelf edge in the Deepwater Taranaki and Northland Basins (Stagpoole and others, 2001;Uruski and Baillie, 2004;Bierbrauer and others, 2008;Uruski, 2010;Duran and others, 2015;Grahame, 2015). Oil and gas sourced mainly from coal beds and from Paleogene organic-rich marine shales migrated into reservoirs ranging from synrift fluvial-deltaic sandstones to slope-channel and basin-floor fan sandstones (King and Funnell, 1997).…”

Section: Total Petroleum Systems and Assessment Unitsmentioning

confidence: 99%

Assessment of undiscovered conventional oil and gas resources of the greater Taranaki Basin and East Coast Basin of New Zealand, 2020

Schenk¹,

Mercier²,

Tennyson³

et al. 2022

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Section: Total Petroleum Systems and Assessment Unitsmentioning

confidence: 99%

Assessment of undiscovered conventional oil and gas resources of the greater Taranaki Basin and East Coast Basin of New Zealand, 2020

Schenk¹,

Mercier²,

Tennyson³

et al. 2022

Fact Sheet

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“…A properly defined architecture forms the basis for understanding reservoir properties such as: geometry, connectivity and continuity, which are important for exploration, appraisal and reservoir management. Knowledge of this greatly improves reservoir development (Ofurhie et al 2002;Grahame 2015;Bouroullec et al 2017). The quest for seismic interpreters to understand the reservoir architecture leads them to carry out an integrated study.…”

Section: Introductionmentioning

confidence: 99%

Seismic reflection pattern and attribute analysis as a tool for defining reservoir architecture in ‘SABALO’ field, deepwater Niger Delta

Fashagba

Enikanselu

Lanisa³

et al. 2019

J Petrol Explor Prod Technol

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An accurate definition of environment of sediment deposition is a sine qua non for characterizing and providing measures for enhancing hydrocarbon reservoirs. Consequently, this study is aimed at determining the sub-environment of deposition and architecture of two reservoirs: S1000 and S2000 reservoirs, in 'SABALO' field, deep offshore Niger Delta. In addition, the study is imperative in order to assess reservoir properties such as: geometry, connectivity and continuity, which are important for exploration and reservoir management. In this study, we integrated well logs from six (6) wells and 3D-seismic data (near and far angle stack) for seismic stratigraphic studies. Four major seismic sequences with their corresponding facies units were recognized by analysis of reflection terminations, seismic parameters and external geometry. The reservoirs of interest are within the seismic sequence one containing facies units: SF1A and SF1B. Both reservoirs were delineated to be structurally and stratigraphically controlled. This implies a combinational trapping system at the reservoir level. Also, hydrocarbons in the reservoir were confirmed to be down to reservoir base. Integrated study of the seismic and well logs shows that the two identified reservoirs, S1000 and S2000, were defined to be weakly confined channel complex with an area of 50 km 2 and 78 km 2 , respectively. Their connectivity was defined to be loosely amalgamated and highly amalgamated, respectively. The results of this paper are essential to develop the reservoirs by utilizing the information of their geometry, connectivity and continuity.

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“…Figure 2. Generalized lithostratigraphic column along the different territories of the Taranaki Basin demonstrates the main tectono-stratigraphic units (compiled from[15,[45][46][47]). …”

mentioning

confidence: 99%

Lithofacies Controls on Hydrocarbon Generation Potentiality of the Syn-Rift Late Cretaceous Rakopi Deltaic Facies in the North-Eastern Offshore Part of Taranaki Basin, New Zealand

Leila,

Radwan,

Abdel-Fattah

2023

Minerals

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The Taranaki Basin in New Zealand presents the most promising territory for strategies of hydrocarbon exploration and development. This basin contains multiple source rock levels in its sedimentary successions formed during syn- and post-rift periods. The deepest source rocks, found in the Rakopi Formation, were deposited in deltaic to deep marine environments and consist of gas-prone coal and organic-rich mudstone lithofacies. However, questions remain about the preservation of their organic carbon. This study integrates various organic geochemical analyses (such as Rock Eval pyrolysis, kerogen petrography, and biomarkers) to assess the hydrocarbon potential of the Rakopi coal and mudstone lithofacies. The organic carbon in Rakopi coals and mudstones originated from oxygenated bottom water, but swift burial during the initial rifting phase facilitated the preservation of organic materials. Rakopi coals are less mature than the mudstone facies and contain a mixture of desmocollinite, suberinite, and resinite macerals. In contrast, the mudstone lithofacies are enriched in liptodetrinite. The maceral mixture in the coal led to its elevated hydrogen index and likely facilitated early expulsion of liquid hydrocarbon phases. Regular steranes, diasteranes, and C29 sterane isomers distribution in the coal and mudstone extracts highlighted a greater terrestrial input in the coals, whereas significant marine input is observed in the mudstone extracts. Biomarkers in the coal and mudstone extracts are similar to some nearby oils discoveries in the Taranaki Basin, thereby confirming oil generation from both coal and mudstone lithofacies in the Rakopi Formation. These findings underscore the potential of liptinite-rich coals to generate liquid hydrocarbon phases at marginal oil maturity levels.

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Deepwater Taranaki Basin, New Zealand—New Interpretation and Modelling Results for Large Scale Neogene Channel and Fan Systems: Implications for Hydrocarbon Prospectivity

Cited by 8 publications

References 6 publications

Assessment of undiscovered conventional oil and gas resources of the greater Taranaki Basin and East Coast Basin of New Zealand, 2020

Assessment of undiscovered conventional oil and gas resources of the greater Taranaki Basin and East Coast Basin of New Zealand, 2020

Seismic reflection pattern and attribute analysis as a tool for defining reservoir architecture in ‘SABALO’ field, deepwater Niger Delta

Lithofacies Controls on Hydrocarbon Generation Potentiality of the Syn-Rift Late Cretaceous Rakopi Deltaic Facies in the North-Eastern Offshore Part of Taranaki Basin, New Zealand

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