Castlegate Sandstone Relative Permeability Hysteresis from LS-LB Simulation

Simulation results capture six distinct saturation-controlled displacement processes, including primary drainage and subsequent imbibition cycles, for an oil/water system. The 216.0 KB CSV file contains data calculated using a Level Set and Lattice Boltzmann workflow on a 200^3 voxel geometry of Castlegate sandstone. Johan Olav Helland published this dataset on figshare in April 2026.

Use Cases

• Model relative permeability hysteresis by analyzing 'krw' and 'kro' across different 'Process' and 'Rev_num' cycles.
• Study capillary pressure ('Pc') relationships with water saturation ('Sw') during drainage and imbibition ('Process' 0 and 1).
• Correlate interfacial area metrics ('Aow', 'Aos') and phase topology ('Eu_oil') with saturation states ('Sw') for different initial conditions ('Swi').
• Validate LS-LB simulation outputs against experimental data using the provided porosity (22.7%) and absolute permeability (2.47 D) of the Castlegate geometry.
• Analyze the impact of reversal saturation points ('Sw_rev') on subsequent drainage or imbibition curves for six different 'Swi' values.

Strengths

• Data includes six full displacement cycles (primary drainage, main imbibition, main drainage, secondary processes) for a total of six different initial water saturations.
• Pore geometry is precisely defined with a voxel length of 5.6e-6 m, porosity of 22.7%, and absolute permeability of 2.47 D.
• Simulation parameters are fully specified, including oil/water interfacial tension (0.030 N/m) and contact angle (20 degrees).

Limitations

• The dataset is small (216.0 KB), indicating a limited scope focused on a single rock sample geometry.
• Results are specific to Castlegate sandstone, a consolidated rock with low pore-to-throat aspect ratio, limiting generalizability.
• Simulations assume equal fluid viscosities and water-wet conditions, which may not represent all reservoir scenarios.

Provenance

Source

figshare, authored by Johan Olav Helland.

Collection Method

Data generated from pore-scale simulations using a Level Set (LS) and Lattice Boltzmann (LB) workflow on a segmented 3D micro-CT image of Castlegate sandstone.

Time Range

Simulation results represent equilibrium states from a numerical experiment, not a temporal series.

Freshness

Last updated in April 2026.

Geography

Data is derived from a pore geometry of Castlegate sandstone, a specific rock type; no geographic location is specified.