GCS RE Toolkit

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Geological Carbon Storage Web APP

Page last modified
May 27 2025

Repsol has developed a web app for the estimation of relative permeabilities and capillary pressure for simulation of CO2 geological storage in saline aquifers and sandstone formations. Suitable for fast screening studies and new venture analysis, when available subsurface data is limited and the time to make decisions is reduced.

MAIN FEATURES: GCS Modeling performs a robust workflow under uncertainty for estimation of Kr and Pc curves needed for dynamic simulation of CO2  geological storage projects. Based on average porosity, permeability, pressure, temperature and brine salinity it estimates relative permeability (drainage and imbibition), capillary pressure (drainage), interfacial tension for the CO2 -Brine system, CO2 and Brine density and viscosity. The results come in the format of commercial reservoir simulators

Pros & Limitations
1
EASY TO USE AND FAST WORKFLOW
1
EXECUTIVE SUMMARY IN EXCEL FORMAT
1
TWO DIFFERENT METHODS TO ESTIMATE THE Kr AND Pc CURVES
0
APPLICABLE ONLY FOR SALINE AQUIFERS AND SANDSTONE FORMATIONS
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PROVIDES RESULTS FOR A MAXIMUM OF 10 ROCK TYPES SIMULTANEOUSLY
Specification
Title Description
Theme/Discipline
Reservoir Engineering
Core Tech
Simulation Software
Industry
CCUS
Requirements
Average properties of the target formation: porosity, permeability, pressure, temperature and brine salinity.
Deliverables
Relative permeability (drainage and imbibition), capillary pressure (drainage), interfacial tension for the CO2 -Brine system, CO2 and Brine density and viscosity
Features
1) Estimates the average Kr curves (drainage and imbibition) for the target formation based on analogous laboratory tests. 2) Estimates the average Pc curve (drainage) for the target formation based on analogous laboratory tests.

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Technology Readiness Level

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[7/9]

Development Technology demonstration Mature / Proven
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Repsol is a multi-energy company that works to generate energy for today and the future. They operate in over 20 countries across 4 continents, serving around 24 million customers with a range of energy solutions for mobility and home use. Repsol is committed to innovation, sustainability, and digital transformation, with a goal of becoming a net zero emissions company by 2050. Their integrated business model spans upstream exploration and production, industrial refining and chemicals, customer-focused products and services, and low-carbon power generation. Repsol emphasizes corporate governance, ethical practices, and responsible taxation in its operations. The company also invests in technology and innovation through its Repsol Technology Lab and corporate venturing initiatives.

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