Structural and Parametric Models of the Załęcze and Żuchlów Gas Field Region, Fore-Sudetic Monocline, Poland – An Example of a General Static Modeling Workflow in Mature Petroleum Areas for CCS, EGR or EOR Purposes

Abstract

-Załęcze and Żuchlów are strongly depleted natural gas fields in aeolian sandstones of the Rotliegend, located in the central part of the Fore-Sudetic Monocline. A set of three static 3D models was generated to check the possibility of CO 2 injection for Enhanced Gas Recovery (EGR) and to check the safety of storage by means of geomechanical modeling: one regional model (ZZA) and two local models -the first for Załęcze (ZA) gas field and the second for Żuchlów (ZU) gas field. The regional model is composed of 12 stratigraphic complexes (zones) from the base of the Rotliegend to the ground surface. The local models comprise only the three lowermost complexes: fluvial deposits of the Rotliegend, aeolian sandstones of the Rotliegend (Reservoir I) and basal Zechstein limestone, Ca1. The key elements of the modeling procedure include: Quality Control (QC) of the data, interpretation of missing parameters necessary for static modeling and their integration within a geomodel. The processing workflow was elaborated to produce convergent regional and local models. The regional static model is a framework for a regional geomechanical model. The local models are the basis for dynamic simulations and local geomechanical modeling. The presented workflow could be used with some changes for geomodeling of many mature gas and oil fields.Résumé -Modèles structurels et paramétriques de la région des gisements de gaz de Załęcze et Żuchlów, Région monoclinale des Sudètes, Pologne -un exemple du déroulement d'une modélisation statique générale dans des zones de pétrole matures dans un but de CCS, EGR ou d'EOR -Załęcze et Żuchlów sont des gisements de gaz naturel largement épuisés dans les sables éoliens du Rotliegend, situés au centre de la structure monoclinale des Sudètes. Un ensemble de trois modèles en 3D statiques a été généré, afin de vérifier la possibilité d'injecter du CO 2 pour améliorer la récupération du gaz et de vérifier la sécurité de stockage au moyen d'une modélisation géomécanique : un modèle régional (ZZA) et deux modèles locaux -le premier pour le gisement de gaz de Załęcze (ZA) et le second pour le gisement de gaz de Żuchlów (ZU). Le modèle régional est

Simulation study of the Lower Cretaceous geothermal reservoir for aquifer thermal energy storage

“…The dynamic ATES model uses the local structural and parametric framework, being the part of the basin scale parametric model of the temperature and effective porosity of the Lower Cretaceous reservoir. They were constructed as CPG grids, using the multiscale structural and parametric modelling workflows (Papiernik et al, 2015 ; Papiernik et al, 2016 ; Papiernik, 2017a , b ; Papiernik & Michna, 2019 . This allows for high-quality local geomodels to be obtained, even in regions poorly controlled with data.…”

Subsalt Rotliegend Sediments—A New Challenge for Geothermal Systems in Poland

“…These works were followed by further regional and semiregional projects conducted in 2020 by the AGH University of Science and Technology. These projects introduced the new quantitative approach based on 3D static models [64][65][66] that applied modified workflows elaborated for petroleum exploration as well as Carbon Capture and Storage (CCS) purposes [4,67].…”

“…The second variant of the structural model, structural model in variant 2 (SMV2), of the K-1 region was constructed in the local scale with application of the SF method and SF to CPG conversion. Parametric models of SMV1 although locally fitted to K-1 were externally controlled (trended) by regional parametric models, using multiscale modeling workflows [4,67,125,130].…”