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首页> 外文期刊>South African Journal of Geology: Being the Transaction of the Geological Society of South African: Syndie die Verhandelinge van die Geologiese Vereniging van Suid-Afrika >Seismic amplitude-based characterisation of the E-BD reservoir. A modelling approach
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Seismic amplitude-based characterisation of the E-BD reservoir. A modelling approach

机译：E-BD油藏的基于地震振幅的表征。建模方法

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摘要

The geometry of the E-BD reservoir is such that the thickness of the oil-leg and the water-leg are usually below the seismic limit of separability. Seismic amplitudes from a 3D survey have previously been used to characterise the reservoir. The validity of this approach is however affected by a thin, silt-rich unit that overlies the reservoir in places. This unit has been termed abandonment facies (AF), and modifies the seismic amplitude of the reservoir-top reflection. AVO effects along reservoir-associated interfaces also influence the stacked seismic amplitude. Five boreholes intersect the E-BD channel. Log data from these boreholes indicate changes in acoustic properties across the sandstone interval. These changes also affect the amplitude of the observed seismic data. In this article, the results of a 2D modeling study are presented, which was undertaken to understand these seismic amplitude effects.
机译：E-BD油藏的几何形状使得油路段和水路段的厚度通常低于可分离性的地震极限。来自3D勘测的地震振幅以前已用于表征储层。然而，这种方法的有效性受到薄薄的，富含淤泥的单元的影响，该单元覆盖了地方的储层。该单元被称为遗弃相（AF），可以改变储层顶反射的地震振幅。沿储层相关界面的AVO效应也会影响叠加的地震振幅。五个钻孔与E-BD通道相交。来自这些钻孔的测井数据表明，整个砂岩层段的声学特性发生了变化。这些变化也会影响观测到的地震数据的振幅。本文介绍了二维建模研究的结果，旨在理解这些地震振幅效应。

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