权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Three-dimensional seismic geomorphology and sedimentology of heterozoan and photozoan carbonate systems, Browse Basin, NW Australia

澳大利亚西北部布劳盆地异虫和光虫碳酸盐系统的三维地震地貌和沉积学

基本信息

批准号：
39051893
负责人：
Dr. Lars Reuning
金额：
--
依托单位：
Arbeitsgruppe Paläontologie - Historische Geologie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2007
资助国家：
德国
起止时间：
2006-12-31 至 2010-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/39051893?language=en
关键词：
Three dimensional seismic geomorphology sedimentology

项目摘要

The Browse Basin on the North West Shelf, Australia, provides a rare insight into the Eocene to recent history of a carbonate shelf that developed from a cool-water ramp to a tropical rimmed-platform. Subsurface signatures of this variable carbonate system are recorded on high-resolution 3D reflection-seismic surveys covering > 1000 km2, 24.000 km regional 2D reflection-seismic lines, as well as on wireline logs and cores of 8 exploration wells. A detailed analysis of this comprehensive dataset will be used to address three key aspects of carbonate-platform development that are currently under discussion: Aspect 1 - It is an open question whether slope erosion in cool-water carbonates is dominantly controlled by slope inclination or sea-level fluctuations. Full 3D spatial control provided by the 3D seismic volume acquired for this study allows the analysis of the relationship between sea-level change, shelf morphology and slope erosion. Aspect 2 - The transition from an unrimmed cool-water ramp to a rimmed tropical carbonate platform has not yet been documented in 3D seismic data, and examples from regional 2D studies are rare. High-resolution 3D analysis in combination with detailed wireline and core studies will support the development of a generally applicable model for such transitions. Aspect 3 – The combined analysis of cores, wireline logs and 3D-seismic properties will contribute to resolve the internal architecture of the tropical carbonate shelf during drowning. 3D stratigraphic forward modelling will be used for a quantitative evaluation of the subsurface interpretation results, ultimately supporting the prediction of carbonate facies in similar but less explored settings. Results of this research project are expected to contribute to a better understanding of the internal architecture and external form of cool-water and tropical carbonate platforms, and to shed light on the key processes shaping these contrasting systems.

澳大利亚西北陆架上的Browse盆地提供了一个难得的机会，可以深入了解始新世，以及从冷水斜坡发展到热带边缘台地的碳酸盐陆架的近代历史。这个可变碳酸盐系统的地下特征被记录在覆盖1000平方公里、24.000公里区域2D反射地震测线的高分辨率三维反射地震勘探上，以及8口探井的电缆测井和岩心上。对这一综合数据集的详细分析将被用来解决目前正在讨论的碳酸盐台地开发的三个关键方面：方面1--冷水碳酸盐岩中的斜坡侵蚀是主要受斜坡倾斜还是海平面波动控制，这是一个悬而未决的问题。通过本研究获得的三维地震体提供的全三维空间控制，可以分析海平面变化、陆架形态和斜坡侵蚀之间的关系。方面2--从无边缘冷水斜坡到边缘热带碳酸盐台地的转变还没有在三维地震数据中被记录下来，区域二维研究的例子也很少见。结合详细的电缆和核心研究的高分辨率三维分析将支持为这种过渡制定一个普遍适用的模型。第三方面--岩心、电缆测井和三维地震属性的综合分析将有助于解决淹没期间热带碳酸盐陆架的内部结构问题。三维地层正演模拟将用于地下解释结果的定量评估，最终支持在类似但较少勘探的环境中预测碳酸盐岩相。预计这一研究项目的结果将有助于更好地了解冷水和热带碳酸盐平台的内部结构和外部形式，并阐明形成这些不同系统的关键过程。