ASEG Extended Abstracts最新文献_第10页

Mapping the hydrostratigraphy and groundwater salinity of the Ord Bonaparte plains from AEM and NMR data 利用AEM和NMR资料绘制Ord Bonaparte平原的水文地层和地下水盐度图

ASEG Extended Abstracts Pub Date : 2019-12-01 DOI: 10.1080/22020586.2019.12073171

K. Tan, N. Symington, C. Harris-Pascal, L. Halas, K. Lawrie

{"title":"Mapping the hydrostratigraphy and groundwater salinity of the Ord Bonaparte plains from AEM and NMR data","authors":"K. Tan, N. Symington, C. Harris-Pascal, L. Halas, K. Lawrie","doi":"10.1080/22020586.2019.12073171","DOIUrl":"https://doi.org/10.1080/22020586.2019.12073171","url":null,"abstract":"Summary This study is part of the groundwater investigations of the Ord Bonaparte plains in the East Kimberley region of Western Australia. A key project aim is to establish a spatial hydrostratigraphic framework to better understand the hydrogeology. To achieve this, AEM data, inverted using 1D SELMA model, were produced as conductivity sections and elevation grids. Interpretation of the AEM data, in conjunction with lithostratigraphic information from three petroleum wells and seven project bores, aided the mapping of hydrostratigraphic units of the Devonian to Permian sequence of the Bonaparte Basin. Mapping results show that the Carboniferous Weaber and Kushill Groups are dipping to the east-northeast and contain laterally continuous stacked aquifers. Within the strata, resistive signatures are associated with sandstone aquifers, slight to moderate conductors are mapped as fine textured aquitard, or as interbedded fine to coarse textured sediment forming semi-confining layers. A water table elevation map was constructed using surface NMR water content profile and machine learning approach to extrapolate across the study area. Using Archie’s Law, groundwater conductivity was predicted from AEM conductivity and porosity derived from borehole NMR measurements.","PeriodicalId":8502,"journal":{"name":"ASEG Extended Abstracts","volume":"15 1","pages":"1 - 5"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89133605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Complete gas-brine imbibition relative permeability curves increase confidence in gas field performance 完整的气盐水渗吸相对渗透率曲线增加了对气田动态的信心

ASEG Extended Abstracts Pub Date : 2019-12-01 DOI: 10.1080/22020586.2019.12073189

M. B. Clennell, C. White, A. Giwelli, M. Myers

{"title":"Complete gas-brine imbibition relative permeability curves increase confidence in gas field performance","authors":"M. B. Clennell, C. White, A. Giwelli, M. Myers","doi":"10.1080/22020586.2019.12073189","DOIUrl":"https://doi.org/10.1080/22020586.2019.12073189","url":null,"abstract":"Summary The standard methods used for measuring gas relative permeability during brine imbibition have been found to be inadequate as the resulting curves are incomplete and may include invalid points. CSIRO, together with an industry partner, developed new methods to improve on existing special core analysis, and generate substantially more complete gas relative permeability curves for samples from a NW Shelf gas field and also a Berea sandstone sample considered as a laboratory standard. The true relative permeability curve is typically ‘S’ shaped or has a rolling over, convex-up shape that is completely different from the concave-up shape of the Corey relperm curve usually fitted to SCAL test data and also assumed in reservoir simulations models as the default. Using the complete and more accurate relative permeability curves can give reservoir engineers more confidence in field development planning, and along the life of the field should result in better history matching. There may also be an economic upside if the reservoir produces gas at a high rate for longer than was originally predicted based on the old relperm curves.","PeriodicalId":8502,"journal":{"name":"ASEG Extended Abstracts","volume":"70 1","pages":"1 - 3"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75812736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Maximising the value of 2D hard rock seismic acquisition at Escondida Porphyry Copper Mine Escondida斑岩铜矿二维硬岩地震采集价值最大化

ASEG Extended Abstracts Pub Date : 2019-12-01 DOI: 10.1080/22020586.2019.12073024

H. Schijns, Gabriel Madero

引用次数: 0

Gold metallogeny of the northern Capricorn Orogen 摩羯造山带北部的金矿成矿作用

ASEG Extended Abstracts Pub Date : 2019-12-01 DOI: 10.1080/22020586.2019.12073049

I. Fielding, S. Johnson

{"title":"Gold metallogeny of the northern Capricorn Orogen","authors":"I. Fielding, S. Johnson","doi":"10.1080/22020586.2019.12073049","DOIUrl":"https://doi.org/10.1080/22020586.2019.12073049","url":null,"abstract":"Summary The timing and distribution of gold mineralization in Proterozoic orogens is influenced by crustal architecture which is often established long before gold mineralization occurs. Gold occurrences in such settings are commonly associated with crustal-scale faults formed at cratonic margins. Once established, these faults provide critical pathways for hydrothermal and mineralizing fluids which during repeated fault reactivations can result in remobilization or introduction of new auriferous fluids resulting in overprinting gold events. Recently published geochronological data for the northern part of the Proterozoic Capricorn Orogen in Western Australia show it has experienced at least three episodes of gold mineralization occurring at c. 2400, 1770 and 1680 Ma. Many of the gold deposits are associated with intracratonic reworking during the 1820–1770 Ma Capricorn Orogeny and 1680–1620 Ma Mangaroon Orogeny. Intracratonic settings are not normally considered prospective for gold mineralization due to a lack of input of juvenile material. However, it appears that repeated hydrothermal fluid flow during intracratonic events, has the potential to upgrade gold mineralization or increase gold endowment throughout the orogen, either through gold remobilization or through introduction of new gold, increasing the potential for economic gold deposits.","PeriodicalId":8502,"journal":{"name":"ASEG Extended Abstracts","volume":"320 1","pages":"1 - 6"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76285137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Using machine learning to predict total organic content – case study: Canning Basin, Western Australia 利用机器学习预测总有机含量——案例研究:西澳大利亚坎宁盆地

ASEG Extended Abstracts Pub Date : 2019-12-01 DOI: 10.1080/22020586.2019.12073231

Russell Menezes

引用次数: 1

Utilising potential field modelling to better inform on the 3D structural architecture in regions of excellent structural control 利用势场建模，更好地告知在优秀的结构控制区域的三维结构建筑

ASEG Extended Abstracts Pub Date : 2019-12-01 DOI: 10.1080/22020586.2019.12073036

R. Armit, T. Blaikie, P. Betts, L. Aillères

{"title":"Utilising potential field modelling to better inform on the 3D structural architecture in regions of excellent structural control","authors":"R. Armit, T. Blaikie, P. Betts, L. Aillères","doi":"10.1080/22020586.2019.12073036","DOIUrl":"https://doi.org/10.1080/22020586.2019.12073036","url":null,"abstract":"Summary Information in the third dimension is intrinsic to potential-field data. Potential-field interpretations and modelling can provide crucial regional and sub-surface geological constraints in areas considered to be structurally ‘well’ understood. These approaches should not be restricted to regions with little to no outcrop. The geophysical interpretation of the Leichhardt River Fault Trough provides new insight into the tectonic evolution of the region that was not apparent from the geological relationships alone. Evidence for a major inversion event over a larger region of the Western Fold Belt pre-dating ca. 1710 Ma. This requires a re-assessment of how we interpret the evolution of the eastern parts of the North Australian Craton. In the Mt Painter Inlier, geophysical inversion modelling indicates that significant additional Ordovician aged felsic intrusions occur at depth. The intrusion of this additional material in the Palaeozoic either could be the product of; or contributed to, an increased local geotherm and heat flow in the region during the Palaeozoic. There is a potential link between these intrusives and Palaeozoic hydrothermal mineralisation in the region (e.g. Mt Gee, Yudanamutana).","PeriodicalId":8502,"journal":{"name":"ASEG Extended Abstracts","volume":"112 1","pages":"1 - 2"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78411562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Using zircon geochemistry to map alteration in the Gawler Craton, South Australia 利用锆石地球化学绘制南澳大利亚高勒克拉通的蚀变图

ASEG Extended Abstracts Pub Date : 2019-12-01 DOI: 10.1080/22020586.2019.12073026

A. Brotodewo, C. Tiddy, D. Plavsa, A. Fabris

{"title":"Using zircon geochemistry to map alteration in the Gawler Craton, South Australia","authors":"A. Brotodewo, C. Tiddy, D. Plavsa, A. Fabris","doi":"10.1080/22020586.2019.12073026","DOIUrl":"https://doi.org/10.1080/22020586.2019.12073026","url":null,"abstract":"Summary Zircon is a refractory mineral that is able to crystallize within hydrothermal, igneous and metamorphic environments, resulting in extreme variability in its external morphology, internal textures and chemistry. The chemistry of zircon is sensitive to its source rock type and crystallisation environment. Zircon has a tendency to incorporate a range of minor and trace elements, largely determined by its crystal structure and changes in temperature, pressure and composition. Internal textures of zircon can be used to indicate the type of crystallisation environment, as well as the environment(s) to which it was subjected following crystallisation. Given the complexity of zircon textures and the uncertainty associated with interpreting isotopic ages, trace element analysis is becoming widely applied as another line of evidence for more confident petrogenic interpretation. Here we present geochemical and morphological data from zircon from the Gawler Craton, South Australia. This area preserves a complex geological history dating back to the late Archean and preserves multiple igneous units that each have their own unique geochemical characteristics and are associated with iron oxide-copper-gold mineralisation. We show that zircon will preserve chemistry reflective of its host rock, and possibly of alteration associated with mineralisation.","PeriodicalId":8502,"journal":{"name":"ASEG Extended Abstracts","volume":"178 1","pages":"1 - 4"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77302374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Paleozoic prospectivity of the Offshore Canning area, Australia 澳大利亚坎宁近海地区古生代远景

ASEG Extended Abstracts Pub Date : 2019-12-01 DOI: 10.1080/22020586.2019.12072974

S. Amiribesheli, Andrew F. Weller

{"title":"The Paleozoic prospectivity of the Offshore Canning area, Australia","authors":"S. Amiribesheli, Andrew F. Weller","doi":"10.1080/22020586.2019.12072974","DOIUrl":"https://doi.org/10.1080/22020586.2019.12072974","url":null,"abstract":"Summary The recent oil, gas and condensate discoveries in the Bedout Sub-basin have triggered a change in thinking in this hitherto underexplored region. Recent drilling at Phoenix South-1 (2014), Roc-1 (2015) and Dorado-1 (2018) all found success within the Triassic Lower Keraudren Formation. These discoveries suggest new play concepts need to be developed that may have previously been overlooked or deemed nonprospective. Their success also suggests that, apart from the charge system, entrapment and sealing mechanisms are the key to exploration success. Dorado-1 is a classic example where vintage seismic data failed to reveal an entrapment and sealing mechanism, while the modern Bilby Non-Exclusive 2D seismic data clearly shows the trap geometry, as well as reservoir-seal content through geophysical quantitative interpretation (QI) techniques. Although the Mesozoic has been the primary exploration target, the understanding of the prospectivity of the Paleozoic remains limited. Inadequate knowledge of the Paleozoic stratigraphy is attributed to the lack of well penetration and paucity of seismic data. The Paleozoic sequences for the region are best described from the Onshore Canning Basin where several commercial hydrocarbon fields have been discovered. Here they are over 11,000 m thick in the Fitzroy Trough, thinning to <5,000 m on the Broome Platform. Integration of the Onshore Canning data with regional geology and the Bilby 2D seismic data reveals the Paleozoic potential, e.g. Carboniferous carbonates and clastics, Devonian reefs, and Permian carbonates, as well as several potential reservoir-seal pairs. This paper discusses the unexplored Paleozoic hydrocarbon potential in the Offshore Canning area, inspired by the recent landmark oil, gas and condensate discoveries in the Bedout Sub-basin and extension of the Onshore Canning Basin geology.","PeriodicalId":8502,"journal":{"name":"ASEG Extended Abstracts","volume":"109 1","pages":"1 - 6"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80707027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

The Geosciences DeVL Experiment: new information generated from old magnetotelluric data of The University of Adelaide on the NCI High Performance Computing Platform 地球科学DeVL实验:在NCI高性能计算平台上由阿德莱德大学旧大地电磁数据生成的新信息

ASEG Extended Abstracts Pub Date : 2019-12-01 DOI: 10.1080/22020586.2019.12073015

N. Rees, B. Evans, G. Heinson, Dennis Conway, Rui Yang, S. Thiel, K. Robertson, K. Druken, Bruce R. Goleby, Jingbo Wang, L. Wyborn, H. Seillé

{"title":"The Geosciences DeVL Experiment: new information generated from old magnetotelluric data of The University of Adelaide on the NCI High Performance Computing Platform","authors":"N. Rees, B. Evans, G. Heinson, Dennis Conway, Rui Yang, S. Thiel, K. Robertson, K. Druken, Bruce R. Goleby, Jingbo Wang, L. Wyborn, H. Seillé","doi":"10.1080/22020586.2019.12073015","DOIUrl":"https://doi.org/10.1080/22020586.2019.12073015","url":null,"abstract":"Summary In recent years, magnetotelluric (MT) processing has become computationally intensive as the scale and size of MT surveys being run increases. Consequently, High Performance Computing (HPC) is now becoming a valuable tool for timely processing and modelling of these large MT datasets. As part of the MT component of the 2017-2019 Australian Research Data Commons (ARDC) funded Geoscience Data Enhanced Virtual Laboratory (DeVL) continuity project, The National Computational Infrastructure (NCI) at the Australian National University will enable MT datasets from The University of Adelaide to be added to the NCI HPC platform with the goal of creating a more Findable, Accessible, Interoperable, Reusable (FAIR) and open public resource. A focus will be on making the time series datasets more suitable for use on HPC and more interoperable with other Earth science disciplines, where High Performance Data (HPD) formats will allow for better scalability and performance. Metadata attributes, as defined by the Australian MT research community, will be added directly to the time series data files. Additionally, time series processing and 3D inversion codes are being optimised for HPD/HPC, with the end goal of rapid time series processing and 3D inversion. Making FAIR MT time series available on HPC can lead to a transformative change in the way MT data analysis is routinely conducted and such a change has the capacity to create new ways of doing collaborative and transparent MT analysis.","PeriodicalId":8502,"journal":{"name":"ASEG Extended Abstracts","volume":"37 1","pages":"1 - 6"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76058356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Direct imaging of alteration with high-resolution hard-rock 3D seismic data at the Darlot Gold Mine Darlot金矿高分辨率硬岩三维地震数据蚀变直接成像

ASEG Extended Abstracts Pub Date : 2019-12-01 DOI: 10.1080/22020586.2019.12073199

G. Hird, W. Turner

{"title":"Direct imaging of alteration with high-resolution hard-rock 3D seismic data at the Darlot Gold Mine","authors":"G. Hird, W. Turner","doi":"10.1080/22020586.2019.12073199","DOIUrl":"https://doi.org/10.1080/22020586.2019.12073199","url":null,"abstract":"Summary The Darlot gold mine is an Archean orogenic deposit located in the world-class gold and nickel terrain of the Yandal granite-greenstone belt within the Yilgarn Craton in Western Australia. In 2016-2017, HiSeis designed, acquired and processed a high-resolution 3D seismic survey centred on the Darlot-Centenary mineralised system with the objective of improving lithological and structural interpretation of the project area and to support targeting of mineralisation. The capability of modern 3D seismic surveys to image formational contacts and structures in hardrock environments has had a game-changing impact on the effectiveness of brownfields exploration programs because the geometry of mineralised systems can now be directly imaged over large volumes of ground. More specifically, partially-preserved relative seismic amplitudes can allow the direct imaging of alteration associated with gold mineralisation in fertile structures, allowing discrimination between these and barren structures and dramatically improving drilling success rates. We present the results of a structural interpretation of the seismic data which focused on identifying drilling targets prioritised with seismic amplitude variation.","PeriodicalId":8502,"journal":{"name":"ASEG Extended Abstracts","volume":"35 1","pages":"1 - 3"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76320234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0