Determining Physical Properties of Unconventional Reservoir Rocks: from Laboratory Methods to Pore-Scale Modeling

Gerke, Kirill M.; Vasilyev, Roman; Корост, Д. В.; Karsanina, Marina V.; Balushkina, Natalya S.; Khamidullin, R. A.; Калмыков, Г. А.; Mallants, Dirk

doi:10.2118/167058-ms

Cited by 20 publications

(6 citation statements)

References 18 publications

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“…Confined fluid flow in the whole pore system. The combination of DFT and the pore-network modeling − approach allows one to effectively upscale physical properties from a single pore to pore system and provides a tool for direct apparent permeability modeling in heterogeneous pore materials with nanoscale porosity.…”

Section: Actual Problems and Challenges Of Molecular Modelingmentioning

confidence: 99%

Wettability Alteration in Gas Condensate Reservoirs: A Critical Review of the Opportunities and Challenges

Kazemi,

Khlyupin,

Azin

et al. 2024

Energy Fuels

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The gas condensate reservoir is classified as a natural gas resource that produces condensate liquid in the reservoir when the pressure in the reservoir drops below the dew point. An innovative strategy to address condensate blockage near the wellbore involves modifying the wettability of the surface of the reservoir rock. This is achieved through chemical treatment, transitioning the surface from a state of strong liquid-wetting to either strong or intermediate gas-wetting. This modern approach effectively mitigates condensate blockage and its associated challenges. Adjusting and sustaining wettability conditions within gas reservoirs requires proper chemicals for a certain reservoir condition. The paper presents a thorough review of wettability and the processes involved in wettability alteration specifically in gas condensate reservoirs. Then, the commonly used wettability alteration chemicals along with their induced flow mechanisms are discussed and reviewed together with a molecular modeling point of view on modern problems of wetting and interfacial phenomena. This paper also focuses on using nanoparticles and fluorochemicals as wettability alteration agents, given that fluorinated nanoparticles are allegedly superior to the chemical wettability altering agents as they change the wettability of the rock surface by modifying both surface energy and surface roughness. This Review indicates the promising use of various nanoparticles along with fluoro materials to enhance ultimate hydrocarbon recovery in gas condensate reservoirs. In the next part, molecular dynamic simulation of imbibition of n-alkanes in kerogen organic slits are presented. The influence of competitive adsorption on multicomponent flows of crude oil and wetting transition on surfaces with molecular roughness are discussed. Actual problems and challenges of molecular modeling methods are also presented.

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Section: Actual Problems and Challenges Of Molecular Modelingmentioning

confidence: 99%

Wettability Alteration in Gas Condensate Reservoirs: A Critical Review of the Opportunities and Challenges

Kazemi,

Khlyupin,

Azin

et al. 2024

Energy Fuels

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“…A segmentation or labeling process in the image analysis of rock is a critical step to separate the different phases and areas presented in raw micro-CT images [1,19,20]. The process also converts the attenuated images into a quantitative characterization of the pore geometry.…”

Section: Ternary Segmentationmentioning

confidence: 99%

Equivalent Pore Channel Model for Fluid Flow in Rock Based on Microscale X-ray CT Imaging

2020

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Pore-scale modeling with a reconstructed rock microstructure has become a dominant technique for fluid flow characterization in rock thanks to technological improvements in X-ray computed tomography (CT) imaging. A new method for the construction of a pore channel model from micro-CT image analysis is suggested to improve computational efficiency by simplifying a highly complex pore structure. Ternary segmentation was applied through matching a pore volume experimentally measured by mercury intrusion porosimetry with a CT image voxel volume to distinguish regions denoted as “apparent” and “indistinct” pores. The developed pore channel model, with distinct domains of different pore phases, captures the pore shape dependence of flow in two dimensions and a tortuous flow path in three dimensions. All factors determining these geometric characteristics were identified by CT image analysis. Computation of an interaction flow regime with apparent and indistinct pore domains was conducted using both the Stokes and Brinkman equations. The coupling was successfully simulated and evaluated against the experimental results of permeability derived from Darcy’s law. Reasonable agreement was found between the permeability derived from the pore channel model and that estimated experimentally. However, the model is still incapable of accurate flow modeling in very low-permeability rock. Direct numerical simulation in a computational domain with a complex pore space was also performed to compare its accuracy and efficiency with the pore channel model. Both schemes achieved reasonable results, but the pore channel model was more computationally efficient.

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“…Several authors have recognized the utility of the autocorrelation function. Debye et al showed the relationship between the autocorrelation and scattering functions, and this approach has been applied to analysis of pore structures in sandstones and organic matter in unconventional reservoirs, cements, gels, and porous filters. − Autocorrelation has also been applied to extending the scales over which pore structures can be analyzed using scattering techniques. ,− Recently, the applicability of two-point probability functions, linear functions, and two-point cluster functions to analyze soil microstructures, introducing directional analysis, has been discussed. − …”

Section: Introductionmentioning

confidence: 99%

A Quantitative Approach to the Analysis of Reactive Mineralogy and Surface Area

Anovitz

Beckingham

Sheets

et al. 2022

ACS Earth Space Chem.

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The textural patterns of geologic materials both reflect and control reactive mineralogy and transport. This is true for a wide range of geochemical reactions. The chemistry of fluids controlled by dissolution during transport depends on the mineralogy to which those fluids have access, either directly on pore walls or fractures, or through diffusive or grain boundary transport in the bulk rock. Similarly, mineral growth during metamorphic, igneous, and diagenetic processes and the final mineral distribution depends on the accessibility of the necessary components to the growing phases and thus on their spatial distribution. To either derive petrologic information from a given rock sample, or to predict fluid chemistry during reactive transport, the geometric relationships between the pore structure and mineralogy of the sample must be quantified. This paper describes a method, based on two-point autocorrelation/crosscorrelation analysis, by which the statistical distribution of distances between the phases, including the pore space, in a given sample may be quantified as the percentage likelihood that a given phase lies at a given distance from any other phase (or the pore space or pore boundary) in that sample, and suggests how those results can be used to quantify reactive mineralogy. This approach is not data source dependent; any two-or three-dimensional image can be analyzed. The results are limited only by the quality of the imagery. Analysis of three examples, one from the Mt. Simon Sandstone in the Illinois Basin and two from the Nagaoka CO 2 sequestration site in Japan, demonstrates the method.

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Determining Physical Properties of Unconventional Reservoir Rocks: from Laboratory Methods to Pore-Scale Modeling

Cited by 20 publications

References 18 publications

Wettability Alteration in Gas Condensate Reservoirs: A Critical Review of the Opportunities and Challenges

Wettability Alteration in Gas Condensate Reservoirs: A Critical Review of the Opportunities and Challenges

Equivalent Pore Channel Model for Fluid Flow in Rock Based on Microscale X-ray CT Imaging

A Quantitative Approach to the Analysis of Reactive Mineralogy and Surface Area

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