Porosity–permeability relationship derived from Upper Jurassic carbonate rock cores to assess the regional hydraulic matrix properties of the Malm reservoir in the South German Molasse Basin
TLDR
In this paper, 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.Abstract:
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.read more
Citations
More filters
Journal ArticleDOI
Geological controls on geothermal resources for power generation
Egbert Jolie,Samuel Scott,Samuel Scott,James E. Faulds,Isabelle Chambefort,Guðni Axelsson,Luis Gutierrez-Negrin,Simona Regenspurg,Moritz Ziegler,Bridget Ayling,Alexander Richter,Meseret Teklemariam Zemedkun +11 more
TL;DR: In this paper, the authors discuss the key geological factors that contribute to the effective exploration of intermediate-temperature to high temperature geothermal resources used for power generation and direct use applications.
Journal ArticleDOI
Petrophysical heterogeneity of the early Cretaceous Alamein dolomite reservoir from North Razzak oil field, Egypt integrating well logs, core measurements, and machine learning approach
Souvik Sen,Mohamed Abioui,Shib Sankar Ganguli,A. A. Elsheikh,Akash Debnath,Mohammed Benssaou,Ahmed Awad Abdelhady +6 more
TL;DR: In this paper, the authors report a comprehensive petrophysical evaluation of the oil-producing Aptian Alamein dolomite reservoir from the North Razzak field, Western Desert of Egypt.
Journal ArticleDOI
Petrophysical and mechanical rock property database of the Los Humeros and Acoculco geothermal fields (Mexico)
L. Weydt,Ángel Andrés Ramírez-Guzmán,A. Pola,Baptiste Lepillier,Juliane Kummerow,Giuseppe Mandrone,Cesare Comina,Paromita Deb,Gianluca Norini,Eduardo Gonzalez-Partida,Denis Ramón Avellán,José Luis Macías,Kristian Bär,Ingo Sass +13 more
TL;DR: Weydt et al. as discussed by the authors developed a new workflow to overcome the gap of knowledge of the reservoir properties, which is used for the interpretation of geophysical data and the parameterization of numerical models and thus are the basis for economic reservoir assessment.
Journal ArticleDOI
Descriptive statistical analysis of experimental data for wettability alteration with surfactants in carbonate reservoirs
TL;DR: In this paper , a comprehensive dataset for wettability alteration with surfactants in carbonate rocks is constructed and application guidelines for surfactant huff-puff treatments are proposed.
Journal ArticleDOI
Descriptive statistical analysis of experimental data for wettability alteration with surfactants in carbonate reservoirs
Ya Yao,Mingzhen Wei,Baojun Bai +2 more
TL;DR: In this article, a dataset including 338 effective surfactant imbibition tests is established by collecting information from nearly 50 publications, and descriptive statistical analysis methods are used to conduct data analysis, including three main parts.
References
More filters
Book
Dynamics of fluids in porous media
TL;DR: In this paper, the Milieux poreux Reference Record was created on 2004-09-07, modified on 2016-08-08 and the reference record was updated in 2016.
Journal ArticleDOI
The electrical resistivity log as an aid in determining some reservoir characteristics
TL;DR: The usefulness of the electrical resistivity log in determining reservoir characteristics is governed largely by: (1) the accuracy with which the true resistivity of the formation can be determined; (2) the scope of detailed data concerning the relation of resistivity measurements to formation characteristics; (3) the available information concerning the conductivity of connate or formation waters; and (4) the extent of geologic knowledge regarding probable changes in facies within given horizons, both vertically and laterally, particularly in relation to the resultant effect on the electrical properties of the reservoir as mentioned in this paper.
Classification of Carbonate Rocks According to Depositional Textures
TL;DR: In this paper, three textural features seem especially useful in classifying those carbonate rocks that retain their depositional texture: presence or absence of carbonate mud, which differentiates muddy carbonate from grainstone; abundance of grains, which allows muddy carbonates to be subdivided into mudstone, wackstone, and packstone; and presence of signs of binding during deposition, which characterizes boundstone.
Journal ArticleDOI
The IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General and Scientific Use
Wolfgang Wagner,Andreas Pruß +1 more
TL;DR: The International Association for the Properties of Water and Steam (IAPWS) adopted a new formulation called "The IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General and Scientific Use" as discussed by the authors.