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  • This Feature Class contains paleogeographic structural polyline features for sedimentary basins in the Northwest Province (Atlas of Petroleum Prospectivity), namely the Taranaki, Deepwater Taranaki, and Reinga-Northland basins. Features are depicted relative to the modern New Zealand coastline. No palinspastic reconstructions have been undertaken. Polygon features for 98 Ma (mid-Cretaceous, NZ Ngaterian Stage) are contained in this Feature Class.

  • This Feature Class contains polygon features that summarise the exploration potential of the Miocene succession within sedimentary basins in the Northwest Province (Taranaki, Deepwater Taranaki, and Reinga-Northland basins). Areas where all of the requirements for oil or gas accumulation are present are indicated as having high exploration potential. Areas where all the requirements are not optimum, but may be present are indicated as areas of moderate exploration potential. Areas of low exploration potential indicates that on the basis of currently available open-file information there is a high risk for one or more of the petroleum systems elements not being able to effectively contribute to the petroleum system in that area. It is important to note that a rating of low exploration potential does not conclusively rule it out; rather, there is a high degree of uncertainty associated with presence of one or more of the petroleum system elements. For any given prospective area, more detailed work and data acquisition would be required. For more information about these data please refer to: Arnot, M.J. and Bland, K.J. et al. (Compilers), 2016. Atlas of Petroleum Prospectivity, Northwest Province: ArcGIS geodatabase and technical report. GNS Science Data Series 23b.

  • This Feature Class contains Common Risk Segment (CRS) polygon features denoting a qualitative assessment of the confidence with which the "K90" seismic horizon has been mapped in sedimentary basins in the Northwest Province (Taranaki, Deepwater Taranaki, and Reinga-Northland basins). Confidence is depicted by a relatively simple "traffic-light" system: green colours denote high confidence, orange denotes moderate confidence, and red colours denote low confidence. For more information about these data please refer to: Arnot, M.J. and Bland, K.J. et al. (Compilers), 2016. Atlas of Petroleum Prospectivity, Northwest Province: ArcGIS geodatabase and technical report. GNS Science Data Series 23b.

  • This Feature Class contains contours that depict the interpreted depth below sea level in milliseconds two-way-time (TWT) to the K80 (c. 84 Ma; Late Cretaceous; New Zealand near-base Haumurian Stage) horizon in the Northwest Province of the Atlas of Petroleum Prospectivity (namely the Taranaki, Deepwater Taranaki, and Reinga-Northland basins). For more information about the seismic horizon naming scheme used in this project please refer to: Strogen, D.P.; King, P.R. 2014. A new Zealandia-wide seismic horizon naming scheme. Lower Hutt, NZ: GNS Science. GNS Science report 2014/34. 20 p. The TWT grids, from which these contours were derived, were generated in Paradigm 2015 SeisEarth software using an adaptive fitting algorithm and a grid resolution of 1 km x 1 km. Faults have not been incorporated into the regional-scale gridding of the TWT maps in this project. The TWT grids were then exported from SeisEarth (Zmap format), checked for internal consistency in Zetaware (Trinity 4.61), edited as needed to account for gridding errors and then exported as ArcView Ascii grids, imported and contoured with Esri's ArcGIS software. Contour spacing is 250 ms. Given the considerable variability in the spacing and density of 2D seismic data over the entire NWP area the "smoothness" of the TWT maps varies accordingly. In the central Taranaki Basin, where seismic line spacing may be 5 km or less, the 1 km x 1 km grid resolution captures the geological complexity well. However, in areas of the NWP such as the Deepwater Taranaki Basin to the west and Reinga Basin in the north, seismic line spacing may be in the order of 15 to 30 km. In such areas the underlying geological complexity is only captured where seismic interpretation exists along the available 2D seismic lines. For further information on these data, please refer to: Arnot, M.J. and Bland, K.J. et al. (Compilers), 2016. Atlas of Petroleum Prospectivity, Northwest Province: ArcGIS geodatabase and technical report. GNS Science Data Series 23b.

  • This Feature Class contains paleobathymetric polygon features for sedimentary basins in the Northwest Province for the Atlas of Petroleum Prospectivity (Taranaki, Deepwater Taranaki, and Reinga-Northland basins), depicted relative to the modern New Zealand coastline. No palinspastic reconstructions have been undertaken. Polygon features for 14 Ma (Middle Miocene, NZ Lillburnian Stage) are contained in this Feature Class.

  • This Feature Class contains Common Risk Segment (CRS) polygon features for denoting the risk of source rocks being absent at the 35 Ma (latest Eocene) level in sedimentary basins in the Northwest Province (Taranaki, Deepwater Taranaki, and Reinga-Northland basins). Risk is depicted by a relatively simple "traffic-light" system: green colours denote low risk, orange denotes moderate risk, and red colours denote high risk. It is important to note that a rating of high risk (red) for this petroleum systems element does not conclusively rule it out; rather, it indicates that on the basis of currently available open-file information there is a high risk for that factor being able to effectively contribute to the petroleum system in that area. For any given prospective area, more detailed work and data acquisition would be required. For more information about these data please refer to: Arnot, M.J. and Bland, K.J. et al. (Compilers), 2016. Atlas of Petroleum Prospectivity, Northwest Province: ArcGIS geodatabase and technical report. GNS Science Data Series 23b.

  • This Feature Class contains Common Risk Segment (CRS) polygon features for denoting the risk of reservoir rocks being absent at the 66 Ma (latest Cretaceous) level in sedimentary basins in the Northwest Province (Taranaki, Deepwater Taranaki, and Reinga-Northland basins). Risk is depicted by a relatively simple "traffic-light" system: green colours denote low risk, orange denotes moderate risk, and red colours denote high risk. It is important to note that a rating of high risk (red) for this petroleum systems element does not conclusively rule it out; rather, it indicates that on the basis of currently available open-file information there is a high risk for that factor being able to effectively contribute to the petroleum system in that area. For any given prospective area, more detailed work and data acquisition would be required. For more information about these data please refer to: Arnot, M.J. and Bland, K.J. et al. (Compilers), 2016. Atlas of Petroleum Prospectivity, Northwest Province: ArcGIS geodatabase and technical report. GNS Science Data Series 23b.

  • This Feature Class contains Common Risk Segment (CRS) polygon features for denoting the risk of reservoir rocks being absent at the 14 Ma (Middle Miocene) level in sedimentary basins in the Northwest Province (Taranaki, Deepwater Taranaki, and Reinga-Northland basins). Risk is depicted by a relatively simple "traffic-light" system: green colours denote low risk, orange denotes moderate risk, and red colours denote high risk. It is important to note that a rating of high risk (red) for this petroleum systems element does not conclusively rule it out; rather, it indicates that on the basis of currently available open-file information there is a high risk for that factor being able to effectively contribute to the petroleum system in that area. For any given prospective area, more detailed work and data acquisition would be required. For more information about these data please refer to: Arnot, M.J. and Bland, K.J. et al. (Compilers), 2016. Atlas of Petroleum Prospectivity, Northwest Province: ArcGIS geodatabase and technical report. GNS Science Data Series 23b.

  • This Feature Class contains Common Risk Segment (CRS) polygon features for denoting a qualitative assessment of the quality and coverage of seismic data across sedimentary basins in the Northwest Province (Taranaki, Deepwater Taranaki, and Reinga-Northland basins). Quality is depicted by a relatively simple "traffic-light" system: green colours denote high quality, orange denotes moderate quality, and red colours denote low quality. For more information about these data please refer to: Arnot, M.J. and Bland, K.J. et al. (Compilers), 2016. Atlas of Petroleum Prospectivity, Northwest Province: ArcGIS geodatabase and technical report. GNS Science Data Series 23b.

  • This Feature Class contains contours that depict the interpreted depth below sea level in milliseconds two-way-time (TWT) to the N10 (c. 21 Ma; Early Miocene; New Zealand mid-Otaian Stage) horizon in the Northwest Province of the Atlas of Petroleum Prospectivity (namely the Taranaki, Deepwater Taranaki, and Reinga-Northland basins). For more information about the seismic horizon naming scheme used in this project please refer to: Strogen, D.P.; King, P.R. 2014. A new Zealandia-wide seismic horizon naming scheme. Lower Hutt, NZ: GNS Science. GNS Science report 2014/34. 20 p. The TWT grids, from which these contours were derived, were generated in Paradigm 2015 SeisEarth software using an adaptive fitting algorithm and a grid resolution of 1 km x 1 km. Faults have not been incorporated into the regional-scale gridding of the TWT maps in this project. The TWT grids were then exported from SeisEarth (Zmap format), checked for internal consistency in Zetaware (Trinity 4.61), edited as needed to account for gridding errors and then exported as ArcView Ascii grids, imported and contoured with Esri's ArcGIS software. Contour spacing is 250 ms. Given the considerable variability in the spacing and density of 2D seismic data over the entire NWP area the "smoothness" of the TWT maps varies accordingly. In the central Taranaki Basin, where seismic line spacing may be 5 km or less, the 1 km x 1 km grid resolution captures the geological complexity well. However, in areas of the NWP such as the Deepwater Taranaki Basin to the west and Reinga Basin in the north, seismic line spacing may be in the order of 15 to 30 km. In such areas the underlying geological complexity is only captured where seismic interpretation exists along the available 2D seismic lines. For further information on these data, please refer to: Arnot, M.J. and Bland, K.J. et al. (Compilers), 2016. Atlas of Petroleum Prospectivity, Northwest Province: ArcGIS geodatabase and technical report. GNS Science Data Series 23b.