Abstract

Despite the fact that the history of studying the geology of the Achimov Formation spans several decades, the depletion of its reserves is low, and the fields where the Achimov beds have been put into commercial development are few. This is due to the complex geological structure of the reservoirs, their vertical and lateral heterogeneity, low porosity and permeability properties, and low oil saturation factor. This paper presents a generalization and analysis of all petrophysical information and a typification of sections from log data with the possibility of using individual petrophysical relationships to assess the nature of reservoir saturation and the hydrocarbon saturation index. Both historical core data and studies made for this paper by the authors were used to create a petrophysical basis for well log interpretation. The typification of the Achimov sections is based on a detailed lithological core analysis using special tests such as scanning electron microscopy and computed microtomography. The identification of different types of sections will allow adjustment of a further hydrodynamic model for predicting the nature of the influx and will significantly increase the reliability of assessing the nature of saturation and the hydrocarbon saturation index of heterogeneous deposits in the Achimov Formation.

中文翻译：

---

低渗透率和相非均质条件下测井数据评估阿希莫夫储层饱和度的性质

摘要

尽管阿希莫夫组地质研究已有几十年的历史，但其储量枯竭程度较低，且已投入商业开发的油田也很少。这是由于储层地质结构复杂、纵向和横向非均质性、孔渗性低、含油饱和度低等原因造成的。本文对所有岩石物理信息进行了概括和分析，并对测井数据中的剖面进行了分类，并可以使用单独的岩石物理关系来评估储层饱和度和碳氢化合物饱和度指数的性质。历史岩心数据和作者为本文所做的研究都被用来为测井解释奠定岩石物理基础。阿希莫夫剖面的典型化是基于使用扫描电子显微镜和计算机显微断层扫描等特殊测试进行的详细岩性岩心分析。不同类型剖面的识别将允许调整进一步的水动力模型来预测流入的性质，并将显着提高评估阿希莫夫地层中非均质沉积物的饱和度性质和碳氢化合物饱和指数的可靠性。