Impact of modelling decisions and rock typing schemes on oil in place estimates in a giant carbonate reservoir in the Middle East

IF 1.9 4区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Petroleum Geoscience Pub Date : 2021-11-29 DOI:10.1144/petgeo2021-028

Mohamed AlBreiki, S. Geiger, P. Corbett

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引用次数: 3

Abstract

We demonstrate how modelling decisions for a giant carbonate reservoir with a thick transition zone in the Middle East, most notably the approach to reservoir rock typing and modelling the initial fluid saturations, impact the hydrocarbon distributions and oil-in-place estimates in the reservoir. Rather than anchoring our model around a single base case with an upside and downside, we apply a comprehensive 3D multiple deterministic scenario workflow to compare-and-contrast how modelling decisions and geological uncertainties influence the volumetric estimates. We carry out a detailed analysis which shows that the variations in STOIIP estimates can be as high as 28% depending on the preferred modelling decision, which could potentially mask the impact of other geological uncertainties. These models were validated through repeated and randomised blind tests. We hence present a quantitative approach that helps us to assess if the static models are consistent in terms of the integration of geological and petrophysical data. Ultimately, the decision which of the different modelling options should be applied does not only influence STOIIP estimates, but also subsequent history matching & forecasts.

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建模决策和岩石分型方案对中东一个巨大碳酸盐岩储层的原地油估计的影响

我们展示了中东一个具有厚过渡带的巨型碳酸盐岩储层的建模决策，最值得注意的是储层岩石类型和初始流体饱和度建模方法，如何影响储层中的碳氢化合物分布和含油估计。我们没有将模型固定在单一的基本情况下，而是应用了一个全面的3D多确定性场景工作流来比较和对比建模决策和地质不确定性如何影响体积估计。我们进行了详细的分析，表明STOIIP估计的变化可能高达28%，这取决于首选的建模决策，这可能潜在地掩盖其他地质不确定性的影响。这些模型通过重复和随机盲试验得到验证。因此，我们提出了一种定量方法，可以帮助我们评估静态模型在地质和岩石物理数据整合方面是否一致。最终，应采用哪种不同建模选项的决定不仅影响STOIIP估计，还影响随后的历史匹配和预测。

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.

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