<div>Palynology preparations from 50 samples from several key wells in the South Australian section of the Pedirka Basin were examined for Geoscience Australia. The sampling was done by Carey Hannaford under inspection number 5358 (see table 1 for sample listing). All resulting slides and remaining residue have been submitted to government. The samples were analysed quantitatively with the first 200 specimens in each sample counted and subsequent species simply recorded as present. In this summary report, the results are provided in tabulated form only. Details of the palynomorph assemblages are recorded on StrataBugs distribution charts, with each taxon expressed as a percentage of the entire assemblage (Appendix B). From this information, assignments are made to the palynostratigraphic scheme of Price (1997), as shown in Figures 1 and 2 and summarised in Appendix A.</div><div>Wells included are: Erabena-1, Macumba-1, Mokari-1, Oolarinna-1, Pandieburra-1, Poolowanna-1, Poolowanna-2, Walkandi-1. </div><div>Also see accompanying report by Hannaford and Mantle, 2022: Palynological analysis of infill samples for selected wells in the Northern Territory section of the Pedirka Basin.</div>

<div>As a resource to enhance exploration in the offshore Otway Basin, Geoscience Australia (GA) has produced a new well folio that extends the scope of a previous release by including 32 key wells from the central and southeast regions. This folio covers the areas from Normanby 1 on the Normanby Terrace, through the Shipwreck Trough and Nelson Sub-basin, to Whelk 1 in the south. The previous well composites included wireline logs for petrophysical analysis, interpreted lithology, organic geochemistry and organic petrology data, and well markers. This folio includes all of these attributes with the addition of core-based depositional environment (DE) and gross depositional environment (GDE) interval interpretations which were subsequently used to constrain wireline interpretation away from core control. The core/wireline lithological interpretation along with further seismic and biostratigraphic data informed well marker locations and enabled a better regional correlation across the basin. The folio provides the complementary datasets used to construct each well composite. Presented at the Australian Energy Producers (AEP) Conference & Exhibition (https://energyproducersconference.au/conference/)

<div>This report presents the results from detailed palynological analyses of both newly processed samples and re-analysis of existing slides across the upper Permian to Lower Triassic section from the following wells across the southern Bonaparte Basin: Tern 3, Tern 5, Ascalon 1A, Blacktip P1, Blacktip 2, Petrel 1A, Petrel 4, Petrel 5, Prometheus 1, Rubicon 1, Torrens 1. This palynological zonal work is supplemented with palynofacies analyses in a subset of wells. In addition to these new analyses, a review of the existing palynological data from open file palynological reports (in company well completion reports) was undertaken for both the immediately under- and overlying late Permian and earliest Triassic intervals in the newly sampled wells and offset wells of the Tern and Petrel gas fields,&nbsp;including the following wells: Petrel 2, Petrel 3, Petrel 6, Tern 1, Tern 2, Tern 4.</div>

The upper Permian to Lower Triassic sedimentary succession in the southern Bonaparte Basin represents an extensive marginal marine depositional system that hosts several gas accumulations, including the Blacktip gas field that has been in production since 2009. Development of additional identified gas resources has been hampered by reservoir heterogeneity, as highlighted by preliminary results from a post drill analyses of wells in the study area that identify reservoir effectiveness as a key exploration risk. The sedimentary succession that extends across the Permian–Triassic stratigraphic boundary was deposited during a prolonged marine transgression and shows a transition in lithofacies from the carbonate dominated Dombey Formation to the siliciclastic dominated Tern and Penguin formations. Recent improvements in chronostratigraphic calibration of Australian biostratigraphic schemes, spanning the late Permian and Early Triassic, inform our review of available palynological data and re-interpretation and infill sampling of well data. The results provide a better resolved, consistent and up-to-date stratigraphic scheme, allowing an improved understanding of the timing, duration, and distribution of depositional environments of the upper Permian to Lower Triassic sediments across the Petrel Sub-basin and Londonderry High. <b>Citation:</b> Owens R., Kelman A., Khider K., Iwanec J., Bernecker T. (2022) Addressing exploration uncertainties in the southern Bonaparte Basin: enhanced stratigraphic control and post drill analysis for upper Permian plays. <i>The APPEA Journal</i> 62, S474-S479

<div>Palynology preparations from 62 samples from several key wells in the Northern Territory section of the Pedirka Basin were examined for Geoscience Australia. The sampling was done by the Geological Survey of NT (see table 1 for sample listing). All resulting slides and remaining residue have been submitted to government. The samples were analysed quantitatively with the first 200 specimens in each sample counted and subsequent species simply recorded as present. In this summary report, the results are provided in tabulated form only. Details of the palynomorph assemblages are recorded on StrataBugs distribution charts, with each taxon expressed as a percentage of the entire assemblage (Appendix B). From this information, assignments are made to the palynostratigraphic scheme of Price (1997), as shown in Figures 1 and 2 and summarised in Appendix A.</div><div>Wells included are: Blamore-1, CBM 93-002, CBM 93-004, CBM 107-001, CBM 107-002, Hale River-1, Simpson-1, Thomas-1. </div><div>Also see accompanying report by Hannaford and Mantle, 2022: Palynological analysis of infill samples for selected wells in the South Australian section of the Pedirka Basin. eCat 147227</div>