丹麦北海Valdemar油田下白垩统储层定量地震解释

IF 1.9 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Petroleum Geoscience Pub Date : 2021-07-19 DOI:10.1144/petgeo2021-016
K. Bredesen, M. Lorentzen, L. Nielsen, K. Mosegaard
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引用次数: 2

摘要

对瓦尔德马尔油田下白垩统Tuxen储层进行了定量地震解释研究,该储层与非均质复杂地质有关。我们的目标是更好地概述整个瓦尔德马尔油田Tuxen储层的储层质量变化。两口评价井的地震叠前数据和测井记录构成了本研究的基础。所使用的工作流程包括地震和岩石物理正向建模、属性分析、彩色反演和用于岩性流体分类的贝叶斯叠前反演。根据测井数据,Tuxen层段的岩石物理特性表明,地震信号更多地受孔隙度的控制,而不是受近偏移(或小角度)处的水饱和度变化的控制。彩色和贝叶斯反演结果通常与储层水平的测井观测结果一致,并符合解释的层位。尽管现有数据有一些局限性,地质环境也很复杂,但结果表明,某些地区的储层质量比其他地区更有希望。因此,这些结果可以为划定最佳储层带以进行进一步的油田开发和选择适当的生产策略提供有用的信息。
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Quantitative seismic interpretation of the Lower Cretaceous reservoirs in the Valdemar Field, Danish North Sea
A quantitative seismic interpretation study is presented for the Lower Cretaceous Tuxen reservoir in the Valdemar Field, which is associated with heterogeneous and complex geology. Our objective is to better outline the reservoir quality variations of the Tuxen reservoir across the Valdemar Field. Seismic pre-stack data and well logs from two appraisal wells form the basis of this study. The workflow used includes seismic and rock physics forward modelling, attribute analysis, a coloured inversion, and a Bayesian pre-stack inversion for litho-fluid classification. Based on log data, the rock physics properties of the Tuxen interval reveal that the seismic signal is more governed by porosity than water-saturation changes at near-offset (or small angle). The coloured and Bayesian inversion results were generally consistent with well-log observations at the reservoir level and conformed to interpreted horizons. Although the available data have some limitations and the geological setting is complex, the results implied more promising reservoir quality in some areas than others. Hence, the results may offer useful information for delineating the best reservoir zones for further field development and selecting appropriate production strategies.
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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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