Overview of the exploration potential of offshore Argentina – insight from new seismic interpretations

IF 1.9 4区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Petroleum Geoscience Pub Date : 2022-01-19 DOI:10.1144/petgeo2020-132

Steve DeVito, H. Kearns

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引用次数: 1

Abstract

Argentina's offshore sedimentary basins cover a vast area on one of the widest continental margins on the planet, yet they remain underexplored today. Previous exploration drilling has failed to encounter commercial volumes of hydrocarbons, in part due to the poor seismic imaging of legacy 1960s–1990s 2D seismic data, and to the majority of wells being drilled on structural highs outside of the source rock kitchens. In this study, we reviewed 52 000 km of recently acquired (2017–2018) regional 2D long-offset seismic data with broadband pre-stack time (PSTM) and depth migration (PSDM) processing. We identified five major structural domains with hydrocarbon prospectivity on the Northern Margin of Argentina and four on the Southern Margin, and the presence of previously unseen structural and stratigraphic traps involving sequences assigned to proven regional source rocks and reservoirs in Permian, Jurassic and Cretaceous rocks. The source and reservoir rocks, petroleum systems, and play types present in the deepwater of the undrilled Argentina Basin represent a true frontier for hydrocarbon exploration. Pseudo relief attribute seismic displays and amplitude v. angle (AVA) analysis are demonstrated to be valuable tools in predicting the stratigraphy of the basins. A new framework for understanding the oil and gas prospectivity of the study area is presented.

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阿根廷近海勘探潜力综述——来自新地震解释的见解

阿根廷的近海沉积盆地覆盖了地球上最宽的大陆边缘之一的大片区域，但时至今日，它们的开发仍然不足。以前的勘探钻井未能遇到商业量的碳氢化合物，部分原因是20世纪60年代至90年代遗留的2D地震数据的地震成像较差，以及大多数井都是在源岩厨房以外的结构高点上钻井的。在这项研究中，我们回顾了52 000 km最近采集的（2017–2018）区域二维长偏移地震数据，采用宽带叠前时间（PSTM）和深度偏移（PSDM）处理。我们在阿根廷北部边缘确定了五个具有油气远景的主要构造域，在南部边缘确定了四个，并且存在以前从未见过的结构和地层圈闭，涉及二叠纪、侏罗纪和白垩纪岩石中已探明的区域烃源岩和储层序列。未钻探的阿根廷盆地深水中的烃源岩和储层岩石、石油系统和区块类型代表了油气勘探的真正前沿。伪地形属性地震显示和振幅与角度（AVA）分析被证明是预测盆地地层的有价值的工具。为了解研究区的油气远景提供了一个新的框架。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Petroleum Geoscience 地学-地球科学综合

CiteScore

4.80

自引率

11.80%

发文量

审稿时长

>12 weeks

期刊介绍： Petroleum Geoscience is the international journal of geoenergy and applied earth science, and is co-owned by the Geological Society of London and the European Association of Geoscientists and Engineers (EAGE). Petroleum Geoscience transcends disciplinary boundaries and publishes a balanced mix of articles covering exploration, exploitation, appraisal, development and enhancement of sub-surface hydrocarbon resources and carbon repositories. The integration of disciplines in an applied context, whether for fluid production, carbon storage or related geoenergy applications, is a particular strength of the journal. Articles on enhancing exploration efficiency, lowering technological and environmental risk, and improving hydrocarbon recovery communicate the latest developments in sub-surface geoscience to a wide readership. Petroleum Geoscience provides a multidisciplinary forum for those engaged in the science and technology of the rock-related sub-surface disciplines. The journal reaches some 8000 individual subscribers, and a further 1100 institutional subscriptions provide global access to readers including geologists, geophysicists, petroleum and reservoir engineers, petrophysicists and geochemists in both academia and industry. The journal aims to share knowledge of reservoir geoscience and to reflect the international nature of its development.