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Djamel Lakehal, Section Head Advanced Modelling & Simulation at Pöyry:
“Our initial results working with the Synopsys Simpleware product have been very positive. We see a real potential in digital rock technology in the Oil & Gas sector, particularly in challenging areas like EOR. In future, we hope to extend our success into new applications (e.g. hydrology) that can take advantage of the powerful features in the Simpleware-TransAT bundle”
Synopsys and Pöyry AMS have recently joined forces to offer a joint solution capable of treating this class of flow for a variety of rock types: sandstone, limestone, etc. Synopsys’ Simpleware’s unique meshing technology based on digitizing millions-of-pixel rock samples is combined with Pöyry’s TransAT CFD, a powerful CFD tool dedicated to capillary-driven multi-fluid flows.
This case study involved study of the flow of oil through Berea sandstone. This example was chosen as an early proof-of-concept, with the idea that future work and collaborations will explore a wider range of geological samples for multiphase rock segmentation. The workflow for this project is as follows:
3D pore rendering of Berea sandstone in Simpleware ScanIP
This process involves importing a stack of 2D images to Simpleware ScanIP, before using a median filter to remove image noise. The software’s image processing tools are then applied to crop the data to a sub-sample, and a threshold tool is used to select pores. Island removal then creates a single connected region and exports a watertight STL file of the pore segmentation.
Very high-quality STL file describing sandstone pores created using Simpleware software
Pressure field in the sample obtained using TransAT CFD
The results of TransAT simulations using Simpleware meshes are presented in the images below, depicting the pressure field and the oil-gas front propagating along the rock scan. These results also agreed well with analysis in Simpleware software, namely meshing via the Simpleware FE module, and calculation of the absolute permeability tensor within the Simpleware FLOW module.
Oil-gas front propagating within the rock pores obtained using TransAT CFD
The joint workflow with Synopsys Simpleware and Pöyry AMS shows the benefits of a fast and accurate method for modeling porous media and carrying out multiphase simulation. The particular example of the Berea sandstone discussed here is notable for showing the insights into oil flow that can be obtained using this combined solution. Given the high value of these workflows for oil production and oil recovery, this efficient method makes simulation of pore-scale multiphase flow more accessible to industry.