Residual trapping of CO2, N2, and a CO2-N2 mixture in Indiana limestone using robust NMR coreflooding: Implications for CO2 geological storage

Alanazi, Amer; Baban, Auby; Ali, Muhammad; Keshavarz, Alireza; Iglauer, Stefan; Hoteit, Hussein

doi:10.1016/j.fuel.2023.129221

Cited by 19 publications

(3 citation statements)

References 83 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This leads to a decrease in the zeta potential of the system . In addition, the LB/CO 2 /dolomite system generally has a resultant negative charge, and the point of zero charge for dolomite lies at pH = 3, , which further reduces the polarity and, hence, the hydrophilicity, of the dolomite surface. ,,, These surface hydroxides are then protonated, as shown in Schemes and , − which can be expected to decrease the T 2 relaxation period.…”

Section: Resultsmentioning

confidence: 99%

“…Assuming that the pores are spherical (C s = 3) and that T 2,surf ≪ T 2,bulk , 35 In the present study, the T 1 and T 2 values were measured by using the conventional Carr−Purcell−Meiboom−Gill pulse sequence with an echo spacing (TE) of 100 s, a T 2,max of 500 ms, and a fixed number of echoes (25,000). 39,44,46,47 A simple limitation of using NMR to measure pore size distribution (PSD) is unavailability of a fixed value of surface relaxivity. 30…”

Section: Nmr T 2 Relaxation Time and 2dmentioning

confidence: 99%

See 1 more Smart Citation

Robust NMR Examination of the Three-Phase Flow Dynamics of Carbon Geosequestration Combined with Enhanced Oil Recovery in Carbonate Formations

Baban,

Hosseini,

Keshavarz

et al. 2024

Energy Fuels

Self Cite

View full text Add to dashboard Cite

A net-zero strategy for counterbalancing anthropogenic carbon dioxide (CO 2 ) emissions has become a key aspect in achieving the global decarbonization initiative by 2050. In particular, carbon geosequestration and enhanced oil recovery (EOR) in hydrocarbon reservoirs is a cost-effective strategy for attaining net-zero emissions. However, EOR and the ability to capture residual CO 2 are greatly affected by the presence or absence of oil layers along with the pore size distribution and fluid displacement, which drastically impact the reservoir-scale flow. Thus, the present study makes systematic use of the versatile in situ two-dimensional (2D) nuclear magnetic resonance (NMR) T 1 −T 2 imaging technique to visualize the fluid occupancy of the pore network in dolomite rock and uses the T 1 /T 2 ratios to assess the physicochemical properties thereof, including the microscopic wettability with respect to the pore-space fluids, after each process step. Specifically, the T 2 relaxation time is measured to demonstrate the displacement processes and to evaluate the trapping behavior and associated rock/fluid interactions at the pore level, which are closely correlated with the fluid flow behavior. Thus, in the tested water-wet dolomite, the strongest-wetting phase (i.e., water) is shown to occupy the smallest pores, where it is held by strong capillary forces, while the nonwetting CO 2 phase occupies the large pores and the intermediate-wetting oil reside in the intermediate-sized pores. As a result, 16% of the residual CO 2 trapped in large pores, while 71% of the oil is recovered, which is comparable to previous results obtained for analogue two-phase flow in water-wet dolomite samples, although some details differ and the displacements are noticeably complex. These findings have significant impacts on net-zero emissions, the budgets and storage capacities of CO 2 -EOR project schemes, and CO 2 geosequestration. In the latter context, the present findings also greatly increase the geo-storage integrity over reservoir-scale implementations.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Nmr T 2 Relaxation Time and 2dmentioning

confidence: 99%

Robust NMR Examination of the Three-Phase Flow Dynamics of Carbon Geosequestration Combined with Enhanced Oil Recovery in Carbonate Formations

Baban,

Hosseini,

Keshavarz

et al. 2024

Energy Fuels

Self Cite

View full text Add to dashboard Cite

show abstract

“…Figure and Figure present the T 2 spectra of two coal samples before and after oxidation with different NaClO solutions. In the previous studies, , the three-peak characteristics has been found in the T 2 spectrum of coal. Therefore, the pore structure of coal can be divided into three types based on the transverse relaxation time T 2 .…”

Section: Resultsmentioning

confidence: 99%

Quantitative Analysis of the Effect of NaClO Stimulation in Anthracite and Bituminous Coal with FTIR and LF-NMR

Chen,

Zhai,

et al. 2024

Energy Fuels

View full text Add to dashboard Cite

Oxidant stimulation is increasingly used to enhance gas and oil production. Unlike acid stimulation, which dissolves minerals, oxidant stimulation modifies coal microstructures through reactions with the coal matrix. However, the stimulating effect of oxidation on coal lacks quantitative characterization. This study investigates the effects of NaClO stimulation on anthracite and bituminous coal microstructures. Various measurements, including LF-NMR, FTIR, SEM, and 3D-XRM, assess the physical and chemical changes in coal. Results indicate that NaClO stimulation significantly alters coal's molecular and porous structures. FTIR reveals notable changes in coal's chemical composition, such as increased hydroxyl groups, aromatic hydrocarbons, and oxygen functional groups with rising NaClO concentration, while aliphatic hydrocarbons decrease. Coal hydrophilicity and aromaticity gradually increase due to enhanced hydrogen bonds and aromatic structures. Four indexes (I, DOC, H al /H, and A(CH 2 )/A(CH 3 )) quantitatively characterize modifications in the four typical functional groups. LF-NMR T 2 spectra show an increase of over 50% in mesopore and macropore volume after 10% NaClO stimulation. Multiscale-fractal analysis yields fractal dimensions for adsorption pores, seepage pores, and microfractures. The fractal dimension of seepage pores decreases with rising NaClO concentration, while adsorption pores and microfractures do not exhibit fractal characteristics. Findings indicate that bituminous coal is more suitable than anthracite for NaClO oxidation stimulation to enhance permeability.

show abstract

Factors affecting compressed carbon dioxide energy storage system in deep aquifers

Tang,

Li,

Liu

et al. 2024

Bull Eng Geol Environ

View full text Add to dashboard Cite

Residual trapping of CO2, N2, and a CO2-N2 mixture in Indiana limestone using robust NMR coreflooding: Implications for CO2 geological storage

Cited by 19 publications

References 83 publications

Robust NMR Examination of the Three-Phase Flow Dynamics of Carbon Geosequestration Combined with Enhanced Oil Recovery in Carbonate Formations

Robust NMR Examination of the Three-Phase Flow Dynamics of Carbon Geosequestration Combined with Enhanced Oil Recovery in Carbonate Formations

Quantitative Analysis of the Effect of NaClO Stimulation in Anthracite and Bituminous Coal with FTIR and LF-NMR

Factors affecting compressed carbon dioxide energy storage system in deep aquifers

Contact Info

Product

Resources

About