Architecture of the Sierra Ladrones Formation, central New Mexico: Depositional controls on the permeability correlation structure
Architecture of the Sierra Ladrones Formation, central New Mexico: Depositional controls on the permeability correlation structure
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DOI：
10.1130/0016-7606(1993)105
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发表时间：
1993-08
影响因子：
4.9
通讯作者：
J. Davis;R. C. Lohmann;F. Phillips;John L. Wilson;D. Love
中科院分区：
文献类型：
--
作者：
J. Davis;R. C. Lohmann;F. Phillips;John L. Wilson;D. Love
水文地质非均匀性的统计模型经常用于含水层和储层表征。然而，客观估计渗透率的空间相关结构所需的数据数量往往令人望而却步。本研究的目的是发展一个更好地了解如何沉积过程的信息可以用来描述水文地质异质性。为此目的，对新墨西哥州的河流/河间Sierra Ladrones地层的露头进行了研究。根据以往的古地理研究和我们自己的野外观察，塞拉利昂Ladrones组的沉积被解释为边缘祖先格兰德河洪泛平原和支流沉积。在阿尔伯克基盆地中部上新世-更新世沉积物的0.16 km[sup 2]半岛露头上绘制了建筑元素图。地质统计分析的结构元素地图数据表明，在水平方向上的非正交各向异性。最强（N30[度]W）和最弱（N90[度]E）相关性的方向分别对应于支流系统和祖先格兰德河洪泛平原的方向。在垂直方向上，相关结构表现出与平均元素厚度相对应的指数行为。结果表明，有关沉积环境的信息，可以用来帮助量化统计地下非均质性。参考文献28篇，图9，1个选项卡。
Statistical models of hydrogeological heterogeneity are often used in aquifer and reservoir characterization. The number of data required to estimate objectively the spatial correlation structure of permeability, however, is often prohibitive. The objective of this study was to develop a better understanding of how information about depositional processes can be used to characterize hydrogeological heterogeneity. An outcrop of the fluvial/interfluvial Sierra Ladrones Formation of New Mexico was studied for this purpose. On the basis of previous studies of paleogeography and our own field observations, deposits of the Sierra Ladrones Formation are interpreted as marginal ancestral Rio Grande flood-plain and tributary deposits. Architectural elements were mapped over a 0.16-km[sup 2] peninsular outcrop of Pliocene-Pleistocene deposits of the central Albuquerque Basin. Geostatistical analysis of the architectural-element map data indicates non-orthogonal anisotropy in the horizontal direction. The orientations of the strongest (N30[degree]W) and weakest (N90[degree]E) correlation correspond to the orientation of the tributary system and the ancestral Rio Grande flood plain, respectively. In the vertical direction, the correlation structure exhibits exponential behavior corresponding to the average-element thicknesses. The results demonstrate that information about depositional environment can be used to help to quantify statistically subsurface heterogeneity. 28 refs., 9 figs., 1 tab.