For the successful realization and productivity prediction of new hydrothermal projects in the South German Molasse Basin, the hydraulic matrix properties of the Upper Jurassic Malm reservoir have to be determined as accurately as possible. To obtain specific information on the distribution of the petrophysical parameters (e.g., rock density, porosity, and permeability) 363 samples of rare drilling cores from the reservoir northeast of Munich (wells Moosburg SC4 and Dingolfing FB) were investigated using different experimental methods. Additionally, porosity was calculated by a downhole resistivity log of a nearby borehole close to Munich for comparison and the attempt of transferability of the data set to other locations within the Central Molasse Basin. Core data were divided into groups of different stratigraphic and petrographic units to cover the heterogeneity of the carbonate aquifer and provide data ranges to improve reservoir and prediction models. Data for effective porosity show a high variance from 0.3 to 19.2% throughout this heterogeneous aquifer. Permeability measured on core samples is scattered over several orders of magnitude (10−4–102 mD). Permeability models based on the porosity–permeability relationship were used to estimate permeability for the whole aquifer section and identify possible flow zones. A newly developed empirical model based on distinct lithofacies types allows a permeability estimation with a deviation < 10 mD. However, fractured, karstified, and vuggy zones occurring in this typically karstified, fractured, and porous reservoir cannot yet be taken into account by the model and result in an underestimation of permeability on reservoir scale. Overall, the dominant permeability trends can be mapped well using this model. For the regional transfer and the correlation of the results, a core-related porosity/permeability log for the reservoir was compiled for a well close to Munich showing similarities to the core investigations. The validation of the regional transferability of the parameter set to other locations in the Molasse Basin was carried out by correlation with the interpreted log data of a well near Munich.

中文翻译：

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来自上侏罗统碳酸盐岩岩心的孔隙度-渗透率关系，以评估德国南部莫拉塞盆地马尔姆储层的区域水力基质特性

为了成功实现德国南部莫拉塞盆地新热液项目并对其进行产能预测，必须尽可能准确地确定上侏罗统马尔姆水库的水力矩阵属性。为了获得有关岩石物理参数（例如岩石密度，孔隙率和渗透率）分布的特定信息，使用不同的实验方法研究了来自慕尼黑东北储层（Moosburg SC4和Dingolfing FB井）的363个稀有钻芯样品。此外，孔隙度是通过附近慕尼黑附近一个钻孔的井下电阻率测井计算得出的，以进行比较，并尝试将数据集传输到中部莫拉塞盆地内的其他位置。核心数据被分为不同的地层学和岩石学单元，以覆盖碳酸盐岩含水层的非均质性，并提供数据范围以改善储层和预测模型。有效孔隙度的数据显示，在整个该非均质含水层中，从0.3％到19.2％的高方差。在岩心样品上测得的磁导率分散在几个数量级（10−4–102 mD）。基于孔隙度-渗透率关系的渗透率模型被用来估算整个含水层的渗透率并确定可能的流动区域。基于不同岩相类型的最新开发的经验模型可以进行渗透率估算，其偏差<10 mD。但是，在这个典型的岩溶，裂缝，该模型尚未考虑到多孔储层，导致储层规模渗透率被低估。总体而言，使用该模型可以很好地绘制主导渗透率趋势。为了进行区域转移和结果的相关性，在慕尼黑附近的一口油井上编制了与储层相关的孔隙度/渗透率测井曲线，显示出与岩心调查的相似之处。通过与慕尼黑附近一口井的解释性测井数据的相关性，对参数集向摩拉斯盆地其他位置的区域可转移性进行了验证。在慕尼黑附近的一口井上，编制了与储层相关的孔隙度/渗透率测井曲线，显示出与岩心调查的相似之处。通过与慕尼黑附近一口井的解释性测井数据的相关性，对参数集向摩拉斯盆地其他位置的区域可转移性进行了验证。在慕尼黑附近的一口井上，编制了与储层相关的孔隙度/渗透率测井曲线，显示出与岩心调查的相似之处。通过与慕尼黑附近一口井的解释性测井数据的相关性，对参数集向摩拉斯盆地其他位置的区域可转移性进行了验证。