Interpretation of Complex Faulted Deposits in the North Sea Using a Relative Geological Time Model
Interpretation of Complex Faulted Deposits in the North Sea Using a Relative Geological Time Model
复制标题
使用相对地质时间模型解释北海复杂断层矿床
DOI：
10.3997/2214-4609.20141426
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
F. Pauget
中科院分区：
文献类型：
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作者：
N. Daynac;S. Lacaze;M. Mangue;F. Pauget
本文介绍了一种基于相对地质时间(RGT)模型的新方法在K05区块解释中的应用。K05区块是一个位于荷兰近海120公里的大型复杂地带。这项研究的目的是在储集层水平上了解该带的地层演化、断裂网络几何形状和岩性分布。RGT方法是一种使用网格的计算机辅助工作流，其中每个节点是一个大小恒定的基本水平面片。主要的挑战在于通过使用油井标记器在盐层以下改进模型结果，而盐层正是水库水位所在的地方。由该模型得到的稀薄属性被用来圈定储集层(中二叠统)的地层单位。使用经典地震属性看不到的最深下降梯度来进行细微断层检测。断层落差分布以很高的分辨率绘制到断层面上，揭示了储集层水平的分区。利用RGT体积对声阻抗测井进行内插，可以在储集层水平识别与精细渐变沉积变化相关的非均质性。
This paper presents the application of a novel method, based Relative Geological Time (RGT) model, for the interpretation of the block K05, a large and complex zone located 120 km offshore Netherlands. The aim of this study was to understand the stratigraphic evolution of the zone, the fault network geometry and the rock properties distribution, in the reservoir level. The RGT method is a computer aided workflow using a grid, where each node is an elementary horizon patch with a constant size. The main challenge consisted in refining the model results below the salt, where the reservoir level lies, by using the well markers. A thinning attribute, derived from the model was used to delineate the stratigraphic units in the reservoir level (middle Permian). Subtle fault detection was done by using the deepest descent gradient, unseen with classical seismic attributes. The fault throw distribution, mapped onto fault planes with a very high resolution, has revealed a compartmentalisation of the reservoir level. The interpolation of acoustic impedance logs, using the RGT volume, allowed to identify heterogeneities related to fine scale gradual deposits variations, in the reservoir level.