Archimetrics: a quantitative tool to predict three‐dimensional meander belt sandbody heterogeneity
Archimetrics: a quantitative tool to predict three‐dimensional meander belt sandbody heterogeneity
复制标题
建筑计量学：预测三维曲流带砂体非均质性的定量工具
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
M. Kleinhans
中科院分区：
文献类型：
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作者：
W. Lageweg;W. M. Dijk;D. Box;M. Kleinhans
河流曲流带沉积由于其沉积中固有的多尺度非均质性，形成了油气田中一些结构最复杂的储集层。目前，曲流带体的特征在很大程度上依赖于理想化的垂直剖面和有限数量的模拟模型，这些模型天真地根据活跃的河流尺寸来推断建筑。需要三维建筑数据来量化粒度非均质性的尺度、沉积的空间模式和与活跃河道的相关长度尺度直接相关的沙洲保存。本研究通过三个大型水槽实验和一个数值模型来描述和构建曲流带沉积物的结构和沉积学，同时考虑了改造和部分保存。曲流带砂体宽厚比在100~200之间，与天然曲流带的报道值一致。首次对曲流带底部的起伏进行了量化，从而改进了对合并曲流带连通性的估计。一个关键的观察结果是，根据相当基本的观测数据，可以很好地预测自然点状砂坝矿床中的斜率和横向吸积包的数量，这一发现随后在几个自然系统上进行了测试。对三维保存的建筑特征的概率曲线进行了量化，从而可以估计杆件尺寸、挡板和障碍物间距分布以及容器尺寸。在此基础上，确定了一套将储集层参数与识别的砂体尺寸和特征的概率曲线相结合的规则，以帮助建立更真实的基于地震和岩心数据估计勘探成功的地质模型。
Fluvial meander belt sediments form some of the most architecturally complex reservoirs in hydrocarbon fields due to multiple scales of heterogeneity inherent in their deposition. Currently, characterization of meander belt bodies largely relies on idealized vertical profiles and a limited number of analogue models that naively infer architecture from active river dimensions. Three‐dimensional architectural data are needed to quantify scales of grain‐size heterogeneity, spatial patterns of sedimentation and bar preservation in a direct relationship with the relevant length scales of active river channels. In this study, three large flume experiments and a numerical model were used to characterize and construct the architecture (referred to as ‘archimetrics’) and sedimentology of meander belt deposits, while taking reworking and partial preservation into account. Meander belt sandbody width‐to‐thickness ratios between 100 and 200 were observed, which are consistent with reported values of natural meander belts. For the first time, the relief of the base of a meander belt is quantified, enabling improved estimates of connectedness of amalgamated meander belts. A key observation is that the slope and number of lateral‐accretion packages within natural point bar deposits can be well predicted from fairly basic observables, a finding subsequently tested on several natural systems. Probability curves of preserved architectural characteristics for three dimensions were quantified allowing estimates of bar dimensions, baffle and barrier spacing distributions and container dimensions. Based on this, a set of rules were identified for combining reservoir parameters with the identified probability curves on sandbody dimensions and character, to help create more realistic geomodels for estimating exploration success on the basis of seismic and core data.
影响因子：
5.8
作者：
A. Nicholas;Greg . Smith;M. Amsler;P. Ashworth;J. Best;R. Hardy;S. Lane;O. Orfeo;D. Parsons;A. Reesink;S. Sandbach;C. Simpson;R. Szupiany
通讯作者：
A. Nicholas;Greg . Smith;M. Amsler;P. Ashworth;J. Best;R. Hardy;S. Lane;O. Orfeo;D. Parsons;A. Reesink;S. Sandbach;C. Simpson;R. Szupiany