Fault-Seal Analysis in the Greater Bay du Nord Area, Flemish Pass Basin, Offshore Newfoundland

IF 1.9 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY
Asdrúbal Bernal
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Abstract

A 3D subsurface structural model was built in a zone of the greater Bay du Nord Area, Flemish Pass Basin, offshore Newfoundland and Labrador, to carry out a post-drilled, fault-seal analysis in a multi-rift, geological complex setting; aiming to test fault-seal predictions, calibrate computed static fault zone attributes and estimate hydrocarbon contact depths. Hydrocarbon exploration campaigns in the greater Bay du Nord Area have primarily targeted rotated fault blocks, which often exhibit structural segmentation and compartmentalisation. A comprehensive approach that combines empirical and deterministic methods for static fault-seal analysis has been implemented. This approach provides insights into open, base, and tight fault-seal scenarios, aiding prospect evaluation in this region. Notably, Shale Gouge Ratios (SGRs) within the range of 16% to 25% serve as a crucial indicator of the transition between fault-rock sealing and non-sealing fault segments. Furthermore, it is emphasised the critical role of hydrodynamics when calibrating or evaluating fault sealing properties. In areas like the Greater Bay du Nord region, characterised by complex geology, it is imperative to regularly update fault-seal models. These updates should align with the availability of new subsurface data, comprehensive analyses, and an improved understanding of the petroleum system. Thematic collection: This article is part of the Fault and top seals 2022 collection available at: https://www.lyellcollection.org/topic/collections/fault-and-top-seals-2022
纽芬兰近海弗拉芒海峡盆地大北部湾地区的断层密封分析
在纽芬兰和拉布拉多近海弗拉芒帕斯盆地大北部湾地区的一个区域建立了三维地下结构模型,以便在多断裂、地质复杂的环境中进行钻探后断层密封分析;目的是测试断层密封预测,校准计算的静态断层带属性,并估算油气接触深度。 大北部湾地区的油气勘探活动主要以旋转断层区块为目标,这些区块通常表现出构造分割和分隔。我们采用了一种结合经验和确定性方法的综合方法来进行静态断层密封分析。这种方法有助于深入了解开阔、基底和致密断层密封情况,有助于该地区的勘探评估。值得注意的是,16% 至 25% 范围内的页岩咬合率(SGRs)是断层岩封堵与非封堵断层段之间过渡的关键指标。此外,还强调了流体力学在校准或评估断层密封特性时的关键作用。 在大北部湾地区等地质复杂的地区,必须定期更新断层密封模型。这些更新应与新的地下数据、综合分析以及对石油系统的进一步了解保持一致。 专题集: 本文是断层和顶封 2022 年专题集的一部分,可从以下网址获取: https://www.lyellcollection.org/topic/collections/fault-and-top-seals-2022
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
Petroleum Geoscience 地学-地球科学综合
CiteScore
4.80
自引率
11.80%
发文量
28
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.
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