OIL AND GAS

GeoDict is the innovative, integrative, easy-to-use, modular software for multi-scale 3D image processing, material modeling, visualization, pore-space analysis, and quantification of physical rock properties, tailored to the needs of the Oil & Gas industry’s E&P sector.

Another rather specialized application of GeoDict in the Oil & Gas industry has been in the assessment of oil entrapment, migration in ice pores, and oil release/spilling from artic ice based on X-ray micro-tomograms. In the Geosciences, for example, the impact of fracture geometry on fluid flow has been studied with GeoDict.

Naturally, GeoDict’s capabilities also include an intuitive user interface, workflow automation by scripting, export to other leading FE/CFD solvers, interface with Matlab®, customization to MS-Excel®, user extensive support and assistance, and much more.

Three packages have been designed in GeoDict to carry out non-destructive in-house digital experiments, to significantly cut time-to-results and, ultimately, reduce costs for the E&P sector:

Digital Rock Physics

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GeoDict -DRP is the modular package for the quantification of pore-scale parameters even under in-situ conditions.

Non-destructive imaging techniques, consisting of modeling 3D digital representations from μCT-images of the rock sample, are combined with fast PDE solvers to determine the geometrical and physical parameters accurately and directly on the rock sample models. GeoDict-DRP’s numerical solvers are tuned towards minimal computational resources at a reasonable time frame. The computed effective physical parameters include absolute and relative (saturation-dependent) permeability, diffusivity, electrical resistivity, elastic moduli, including the anisotropy constants, and many others.

All these rock parameters can also be computed after virtually simulating pressure and temperature in-situ conditions.

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Digital Sand Control

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GeoDict -DSC is the modular package for computer-engineering of sand control screen systems consisting of base pipe, protective layers, filter mesh, and gravel pack. The complete design and visualization of sand control devices is done digitally with WeaveGeo, GridGeo, and LayerGeo, included in the GeoDict -DSC package.

WeaveGeo has been designed for the generation and optimization of application-specific new mesh types. Relevant mesh parameters, such as mesh pattern, warp and weft wire diameter and pitch, crank factor, stiffness and ovality of the wires and many others can be quickly and interactively modified until the user is satisfied with the design. Using LayerGeo, the meshes generated with WeaveGeo can be assembled as multilayer woven filter meshes, in combination with perforated plates generated with GridGeo.

Multilayer meshes combine the advantages of multiple mesh types in just one medium. Innovative mesh designs integrate increased flexibility, mechanical stability, and high throughput with lower differential pressure, with an absolutely consistent pore distribution.

The GeoDict -DSC package also includes modules to carry out fast Computational Fluid Dynamics (CFD) simulations. With them it is possible to identify the ideal sieving and filtration parameters of the designed multilayer meshes for the optimization of multiple solid and liquid filtration tasks.

Parameters such as maximum glass bead diameter, filtration efficiency, pressure drop at a specified media flow, including filter cake, flow rate at a specified differential pressure, along with bubble point are revealed.

This way, processes until then hidden can be understood, and based on these parameters, a mesh or mesh package with optimum filtration properties, that incorporates the characteristics of sand, can be immediately described.

Using the GeoDict DSC package, our customers in the production of Sand Control systems sector build multilayer meshes in 8 different grades, in the 60 to 600 microns range for a wide variety of applications. For instance, diverse combinations of KPZ (Köperpanzertresse) mesh, plain Dutch weaves, twilled Dutch weaves, and square meshes are used as sand control screens for offshore oil extraction. While filtering sand and other solids, the screens protect the oil pipelines from damage and prevent production outages. Depending on on-site conditions, diverse grades of mesh fineness are employed which exemplify the best solution based on the required retention rate and the pressure loss caused by the filtration.

Digital Hydraulic Fracturing

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GeoDict-DHF is the modular package for digital proppant model design, pore-size distribution analysis, and estimation of permeability and mechanical properties.