MRST-Shale: A Open-source Shale Gas Simulator
Bin Wang (binwang.0213@gmail.com)
Craft & Hawkins Department of Petroleum Engineering, Louisiana State University, US
OpenShale is a light-weight open-source library for simulating flow in naturally-fractured shale-gas reservoirs based on the Matlab Reservoir Simulation Toolbox (MRST) provided by SINTEF ICT (http://www.sintef.no/projectweb/mrst/). It requires MRST to be added to the matlab path by running "startup.m".
Currently available features include:
- Explicit fracture modeling (EFM)
- 2D Embedded discrete fracture modeling (EDFM)
- Fracture mesh generation with log-LGR
- Random 2D/3D discrete natural fracture generation (ADFNE, Alghalandis, 2017)
- Arbitrary user defined sorption&transport function
- Fully implicit compositional/black-oil solver with automatic differentiation (Krogstad et al, 2015)
- Verified solver against commercial simulator (CMG)
Features available in our new 3D code (https://github.com/UnconvRS/shale/tree/MRST):
- Improved pEDFM (SPE-201243-PA)
- 3D verification
- Compositional simulation
This documentation of the 3D code is presented in an upcoming book chapter Advanced Modelling with the MATLAB Reservoir Simulation Toolbox
Install & Usage
The code is tested and developed based on MRST 2018a. New version of MRST may cause problmes.
Install
- Install MRST2018a.
- Add the MRST_Shale folder to the "modules" folder of MRST.
- Update the "mrst-2018a/modules/hfm" and "mrst-2018a/modules/compositional" from "MRST_Shale/3rdParty"
- Update the "mrst-2018a/utils/ADI.m" from "MRST_Shale/3rdParty"
Once MRST and our module are installed and our module can be used like any other MRST module.
Getting start
To run examples in MRST_Shale:
- Before any script that relies on the repository is run, MRST must be started. This is done by running the file startup.m which is loacted inside of your MRST directory.
- Navigate to "mrst-2018a/modules/" and add the "MRST_Shale" folder to Path by "Add to Path" - > "Selected Folders and Subfolderes"
- Run any example script in the "MRST_Shale/examples"
this will make the contents of the geochemistry directory available in the workspace.
Example List
| Example | FileName | Comments |
|---|---|---|
| Case 1a/1b | Case1_MRST_EDFM/LGR_benchmark.m | Single vertical HF with EFM and EDFM |
| Case 1c | Case1_MRST_EDFM/LGR_NF_benchmark.m | Single vertical HF and 3 horizontal NFs with EFM and EDFM |
| Case 2 | Case2_MRST_LGR_benchmark.m | 5 vertical HFs verification case (Jiang et al, 2015) |
| Case 3 | Case3_HistoryMatching_Barnett.m | 28 vertical HFs history matching case of Barnett Shale (Cao et al, 2016) |
| Case 4 | Case4_NaturalFrac_Geomechanics_Barnett.m | Same with Case 3 but with non-planar HFs, random generated NFs and geomechanics effect |
License
Please cite this project when you using it in your project
Wang B, Fidelibus C. An Open-Source Code for Fluid Flow Simulations in Unconventional Fractured Reservoirs. Geosciences. 2021; 11(2):106. https://doi.org/10.3390/geosciences11020106
Reference
- Alghalandis, Y.F., 2017. ADFNE: Open source software for discrete fracture network engineering, two and three dimensional applications. Computers & Geosciences, 102, pp.1-11.
- Cao, P., Liu, J. and Leong, Y.K., 2016. A fully coupled multiscale shale deformation-gas transport model for the evaluation of shale gas extraction. Fuel, 178, pp.103-117.
- Chai, Z., 2018. An Efficient Method for Fractured Shale Reservoir Simulation & History Matching: The cEDFM Approach (Doctoral dissertation).
- Jiang, J. and Younis, R.M., 2015. Numerical study of complex fracture geometries for unconventional gas reservoirs using a discrete fracture-matrix model. Journal of Natural Gas Science and Engineering, 26, pp.1174-1186.
- Krogstad, S., Lie, K.A., Møyner, O., Nilsen, H.M., Raynaud, X. and Skaflestad, B., 2015, February. MRST-AD–an open-source framework for rapid prototyping and evaluation of reservoir simulation problems. In SPE reservoir simulation symposium. Society of Petroleum Engineers.