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首页> 外文期刊>Nonlinear processes in geophysics >Distribution of petrophysical properties for sandy-clayey reservoirs by fractal interpolation
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Distribution of petrophysical properties for sandy-clayey reservoirs by fractal interpolation

机译：分形插值法在砂质黏土储层物性上的分布

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摘要

The sandy-clayey hydrocarbon reservoirs of the Upper Paleocene and Lower Eocene located to the north of Veracruz State, Mexico, present highly complex geological and petrophysical characteristics. These reservoirs, which consist of sandstone and shale bodies within a depth interval ranging from 500 to 2000 m, were characterized statistically by means of fractal modeling and geostatistical tools. For 14 wells within an area of study of approximately 6 kmsup2/sup, various geophysical well logs were initially edited and further analyzed to establish a correlation between logs and core data. The fractal modeling based on the R/S (rescaled range) methodology and the interpolation method by successive random additions were used to generate pseudo-well logs between observed wells. The application of geostatistical tools, sequential Gaussian simulation and exponential model variograms contributed to estimate the spatial distribution of petrophysical properties such as effective porosity (PHIE), permeability (K) and shale volume (VSH). From the analysis and correlation of the information generated in the present study, it can be said, from a general point of view, that the results not only are correlated with already reported information but also provide significant characterization elements that would be hardly obtained by means of conventional techniques.
机译：位于墨西哥韦拉克鲁斯州北部的上古新世和下新世的砂质粘土油气藏具有高度复杂的地质和岩石物理特征。这些储层由深度范围为500至2000 m的砂岩和页岩体组成，通过分形建模和地统计学工具进行了统计表征。对于大约6 km 2 研究范围内的14口井，首先对各种地球物理测井记录进行了编辑和进一步分析，以建立测井与核心数据之间的相关性。使用基于R / S（缩放范围）方法的分形建模和通过连续随机相加的插值方法生成观测井之间的伪井测井。地统计学工具，顺序高斯模拟和指数模型变量图的应用有助于估计岩石物理特性的空间分布，例如有效孔隙率（PHIE），渗透率（K）和页岩体积（VSH）。从本研究中生成的信息的分析和相关性来看，可以说，从一般的角度来看，结果不仅与已经报告的信息相关，而且还提供了难以通过手段获得的重要表征元素。常规技术。

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