基于岩石物理建模的潘诺尼亚盆地灰岩气藏剪切速度估算

IF 1.9 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY
D. Vukadin
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引用次数: 0

摘要

在Pannonian盆地,特别是在克罗地亚,有少数井获得了剪切速度。通常,定量解释必须只依赖于纵波速度数据,而必须模拟横波速度。横波速度估计与其他岩石物理数据相结合对于详细描述储层至关重要。纵波速度和横波速度允许对油藏的不同饱和状态进行地震模拟。本文以Pannonian盆地灰岩储层Kuster-Toksöz模型和Xu-Payne模型为基础,介绍了在没有剪切速度数据的情况下,气田及邻近具有相同岩性的气田的横波速度估计工作流程。结果是用井眼资料得到的纵波速度和VSP s波层速进行校准的。虽然岩石物理模型是对真实岩石的理想化模拟,但在模拟的纵波速度和实测的纵波速度之间,以及模拟的纵波速度和VSP层速之间,都获得了非常好的相关性。该研究还说明了在页岩含量增加的地区确定孔隙纵横比的问题。由于对潘诺尼亚盆地灰岩的研究有限,这些结果有助于更好地理解潘诺尼亚盆地灰岩的地震参数。结果表明,所提出的工作流程能较好地估计横波速度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Shear velocity estimation based on rock physics modeling of limestone gas reservoir in the Pannonian basin
In the Pannonian Basin, especially in Croatia, there are a small number of wells with acquired shear velocities. Often, quantitative interpretation must rely only on compressional velocity data, and shear velocity must be modelled. Shear wave velocity estimation in combination with other petrophysical data is essential for detailed reservoir characterization. Compressional and shear wave velocity allow the seismic modelling of different saturation states in a reservoir. This paper demonstrates a workflow for S-wave velocity estimation where shear velocity data is absent in the gas field and neighboring fields with the same lithology, based on the Kuster-Toksöz and Xu-Payne models applied to the Pannonian basin limestone reservoir. The results are calibrated with the P-wave velocity obtained from borehole data and the VSP S-wave interval velocity. Although rock physics models are idealized analogues of real rocks, a very good correlation was obtained between the modelled and measured P-wave velocity, as well as between the modelled S-wave velocity and the VSP interval velocity. The study also illustrates the problem of defining the pore aspect ratio in zones of increasing shale content. Due to the limited research on the limestones of the Pannonian Basin, these results enable a better understanding of the seismic parameters of the Pannonian Basin limestones. The results indicate that the proposed workflow gives an adequate estimation of S-wave velocities.
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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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