Quantification of the impact of pore pressure on relative permeability curves utilizing coreflood unit with gamma ray scanning capability

Gautam, Sandarbh; Magzymov, Daulet; Dindoruk, Birol; Fyfe, Richard; Holmes, Kory

doi:10.1016/j.geoen.2023.211877

Cited by 2 publications

(1 citation statement)

References 28 publications

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“…Additionally, the influence of normal stress, rock mineral composition, and slip rate on the long-term conductivity of shale was analyzed. According to Fan et al, 30 Gautam et al, 31 and Li et al, 32 the permeability models of shale reservoirs mainly included three types: rock core permeability model, fractured core permeability model, and fracture permeability model. These experts conducted in-depth research on broken permeability models and shale gas reservoir permeability evolution.…”

Section: Introductionmentioning

confidence: 99%

Seepage Characteristics of Broken Carbonaceous Shale under Cyclic Loading and Unloading Conditions

Zhang,

Yuan,

Luo

et al. 2023

Energy Fuels

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This study conducted a seepage experiment of broken shale under cyclic loading and unloading conditions to investigate the permeability characteristics of broken shale with different particle sizes under stress disturbance. There were six groups of broken shale samples with different particle sizes, and three cycles of loading and unloading were conducted to test the permeability of broken shale. The influence of the number of cycles and shale particle size on permeability damage was analyzed. Furthermore, the stress-seepage model of broken shale was established to analyze the influence of the number of cycles and shale particle size on the variation of stress sensitivity of broken shale under different loading and unloading stages. The results show that the initial permeability, permeability damage, and stress sensitivity of broken shale are negatively correlated with the number of cycles and that the first cycle has a significant impact on them. As the size of the broken shale particles increases, the rate of change in shale permeability also increases before and after conducting experiments. This results in a greater shale damage permeability. However, the impact of the number of cycles on shale permeability damage decreases. Additionally, the shale's stress sensitivity becomes stronger. It is also found that the seepage characteristics between the small particle size (G1−G4, 0−6.8 mm) and the large particle size (G5−G6, 7−15 mm) are different in the broken shale samples with six different particle sizes. In addition, the change of the shale particle structure under cyclic loading and unloading conditions is discussed, and the mechanism of the shale permeability change is studied. This study indicates the seepage characteristics of broken shale under cyclic loading and unloading conditions, which has a certain guiding significance for the safe and efficient extraction of shale gas wells.

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Section: Introductionmentioning

confidence: 99%

Seepage Characteristics of Broken Carbonaceous Shale under Cyclic Loading and Unloading Conditions

Zhang,

Yuan,

Luo

et al. 2023

Energy Fuels

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Quantification of the Effect of CO2 Storage on CO2-Brine Relative Permeability in Sandstone Reservoirs: An Experimental and Machine Learning Study

Ahmed,

Paker,

Abdulwarith

et al. 2024

SPE Annual Technical Conference and Exhibition

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Injection of carbon dioxide (CO2) into subsurface reservoirs is a pivotal component of carbon capture, utilization, and storage (CCUS) technologies, aimed at mitigating the adverse impact of anthropogenic greenhouse gas emissions on climate change. A critical aspect influencing the efficacy of CCUS is the interaction between CO2 and brine within sandstone reservoirs, particularly how CO2 storage affects the wettability of the rock and, consequently, dynamics of fluid flow characterized by the relative permeability and capillary pressure. This study aims to quantitatively assess the steady-state relative permeability between CO2 and brine in Berea sandstone, a common analog for reservoir rocks, and the implications of it in CO2 storage. Prior to performing the dynamic flow tests, a detailed analysis, static reactivity of the rock-fluid system has been completed. Employing an advanced core flooding apparatus, complemented by gamma-ray scanning technology, we conducted a series of experiments to measure the CO2-brine relative permeability before and after a 30-day CO2 exposure under reservoir conditions (1500 psi and 150°F). This experimental setup allowed for precise, in-situ saturation measurements, providing a comprehensive understanding of the changes in fluid distributions and flow behavior induced by CO2 storage. Insights derived from this investigation are anticipated to significantly augment existing predictive models for CCUS, facilitating more accurate assessments of CO2 injection strategies and storage capacity of the potential reservoirs. By examining the relationship between CO2 storage and relative permeability, our research underscores the critical need for integrated approaches in the design and optimization of CCUS operations. Ultimately, this study contributes to advancing CCS technologies as an integral solution for the technical evaluation of the subsurface options for climate change mitigation, highlighting the nuanced interplay between geological and chemical processes in subsurface environments and scale-up processes.

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Quantification of the impact of pore pressure on relative permeability curves utilizing coreflood unit with gamma ray scanning capability

Cited by 2 publications

References 28 publications

Seepage Characteristics of Broken Carbonaceous Shale under Cyclic Loading and Unloading Conditions

Seepage Characteristics of Broken Carbonaceous Shale under Cyclic Loading and Unloading Conditions

Quantification of the Effect of CO2 Storage on CO2-Brine Relative Permeability in Sandstone Reservoirs: An Experimental and Machine Learning Study

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