Formula Used
The estimation of carbon dioxide storage capacity in depleted oil and gas reservoirs relies on established petrophysical and thermodynamic chemical equations. The core volumetric calculation is expressed as:
$$M_{CO2} = V_b \times \left(\frac{N}{G}\right) \times \phi \times \rho_{CO2} \times E$$
Where $M_{CO2}$ is the total mass of stored carbon dioxide, $V_b$ is the bulk volume of the reservoir, $N/G$ is the net-to-gross ratio, $\phi$ is the porosity, $\rho_{CO2}$ is the density of supercritical carbon dioxide under reservoir conditions, and $E$ is the storage efficiency factor incorporating microscopic and macroscopic displacement efficiencies.
How to Use This Calculator
- Input the bulk reservoir volume ($V_b$) in cubic meters into the first geometry panel.
- Specify the average porosity ($\phi$) and net-to-gross ratio as percentages.
- Provide the supercritical CO2 density and storage efficiency factor in the middle fluid properties column.
- Enter correction coefficients like residual oil saturation and formation volume factor in the third column.
- Click the submit button to review computed outputs instantly displayed right above the input interface.
Comprehensive Guide to Carbon Sequestration in Hydrocarbon Formations
Carbon capture and storage (CCS) plays an indispensable role in global initiatives aimed at reducing industrial greenhouse gas emissions. Depleted oil and gas reservoirs offer unique structural advantages for permanent carbon dioxide sequestration due to their well-documented geological characteristics, proven trap integrity, and existing infrastructure.
When supercritical carbon dioxide is injected into depleted petroleum strata, it undergoes complex chemical and physical interactions with resident formation fluids and mineral matrices. Over time, physical trapping mechanisms are supplemented by dissolution trapping, wherein CO2 dissolves into formation brines, and mineral trapping, where dissolved carbon reacts with host rock minerals to precipitate stable carbonate compounds.