Induced polarization effect in reservoir rocks and its modeling based on generalized effective-medium theory

Burtman, Vladimir; Zhdanov, Michael S.

doi:10.1016/j.reffit.2015.06.008

Cited by 12 publications

(5 citation statements)

References 32 publications

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“…5c. Burtman and Zhdanov (2015) observed that the relaxation time for a spheroid metallic grain is proportional to its major axis when it aligns with the electric field, and our findings suggest that the network structure of massive sulfides may serve a similar role. Since T is proportional to a 2 , T remains unchanged with the same-sized particles clustered together.…”

Section: Specifying General Trends and Geometric Influences On Charge...supporting

confidence: 58%

Correlation between induced polarization and sulfide content of rock samples obtained from seafloor hydrothermal mounds in the Okinawa Trough, Japan

Ohta,

Goto,

Koike

et al. 2024

Earth Planets Space

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The physical properties of seafloor massive sulfides are crucial for interpreting sub-seafloor images from geophysical surveys, shedding light on the evolution of seafloor mineral deposits. While some studies have explored the relationship between electrical properties and the volume of conductive minerals in rocks from seafloor massive sulfide deposits, they primarily focused on artificial samples, leaving the characteristics of natural samples less understood. Moreover, there has been no comprehensive study detailing the general characteristics of electrical properties, particularly chargeability and relaxation time, in relation to the volumetric fraction of sulfides in rocks from massive sulfide mounds in typical hydrothermal areas. In this study, we employed complex conductivity measurements, elemental concentration analysis, and mineral content identification on to rock samples from the active hydrothermal zones of the Okinawa Trough in Japan. The complex conductivity observed was remarkably high, with a pronounced imaginary component and a broad frequency range. This is attributed to induced polarization extending beyond our measurement range. The rock samples were rich in conductive sulfide minerals such as pyrite, chalcopyrite, and galena. Using the Cole–Cole rock physics model, we established a correlation between rock chargeability and relaxation time coefficient with the volume fraction of conductive sulfide minerals, which deviated from previous findings. The intensity of induced polarization was notably higher than anticipated in earlier studies using artificial samples. Furthermore, we observed a distinct positive correlation between the coefficient of relaxation time and the increase in sulfide volume, likely due to the geometric characteristics of the sulfide minerals. Our findings suggest that rocks in massive sulfide mounds may generally construct sulfide clusters that lengthen the conductive path of the electrical carrier. Graphical Abstract

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Section: Specifying General Trends and Geometric Influences On Charge...supporting

confidence: 58%

Correlation between induced polarization and sulfide content of rock samples obtained from seafloor hydrothermal mounds in the Okinawa Trough, Japan

Ohta,

Goto,

Koike

et al. 2024

Earth Planets Space

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“…Revil et al [10,11] used a new model to study the influence of oil saturation of formation water on the complex resistivity of oil-bearing sandstone and found that the resistivity and the amplitude of the phase increase with increasing oil saturation, while the imaginary component of the complex resistivity decreases. Burtman and Zhdanov [12] found that oil-bearing sandstone and carbonate rocks have significant induced polarization response characteristics through experiments and verified the early geophysical application of the IP method in oil-bearing reservoir exploration. By measuring the complex resistivity of artificial sandstone with different physical properties under different water saturation conditions and by fitting the data using the Cole-Cole model, Jiang et al [13] found that the frequency index in the model initially decreased and then increased with decreasing water saturation, so they pointed out that it is expected that this index is expected to be applied in the study of oil-water distribution in reservoirs.…”

Section: Introductionmentioning

confidence: 73%

Experimental Study of Complex Resistivity Characteristics of a Sandstone Reservoir under Different Measurement Conditions

et al. 2023

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Due to the variability of fluid properties and saturation of reservoirs, large differences in formation temperature and pressure, and the diversity of rock and mineral compositions, the petrophysical response of reservoirs is often complex. This study explored a new method of reservoir fluid identification and evaluation based on the complex resistivity response characteristics of sandstone reservoirs under different measurement conditions. The complex resistivity of the five sandstone samples was measured under normal temperature and pressure and variable pressure, temperature, and formation conditions and under different oil saturations. Furthermore, the reservoir was comprehensively analyzed and evaluated based on the mineral composition, porosity, and permeability parameters. The results show that the resistivity of the sandstone increases logarithmically with pressure and oil saturation but decreases logarithmically with temperature and depth. The polarizability decreases slightly with increasing pressure and increases slightly with increasing temperature. With increasing depth, the polarizability decreases obviously, and with increasing oil saturation, the polarizability decreases moderately. Under different measurement conditions, the complex resistivity data for the sandstone reservoir and the IP parameters extracted through inversion are regular. The results of this study provide a new method for the identification and evaluation of complex reservoir fluids and have important reference value.

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“…When pores expand, electrolytic solution gradually fills the pores, and the corresponding capacitance increases. In addition, Burtman et al analyzed the induced polarization mechanism of rocks and tested the IP response of sandstone, and found that the electric double layer is related to the size and shape of pores filled with electrolyte [13]. Compared with the discrete phenomenon in the third chapter, there is a certain regularity in creep electrochemical test, that is, with the development of creep deformation of rock samples, it shows a decreasing trend.…”

Section: Change Law Of Electrochemical Impedance Spectroscopy In Creep Process Of Corroded Sandstonementioning

confidence: 99%

Experimental Study on Creep of Sandstone under Hydrochemical Corrosion

Sun

et al. 2022

J. Phys.: Conf. Ser.

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Corrosion creep of sandstone has great influence on the safety and stability of geotechnical engineering, and it is of great significance to study the creep characteristics of sandstone under the action of hydrochemical corrosion for the long-term stability of geotechnical engineering. Through creep test of corroded rock, the characteristics of rock deformation and strength are analyzed. Combined with electrochemical impedance spectroscopy (EIS), the microcracks of corroded sandstone during creep process are detected, and the variation law of equivalent circuit parameters and the development trend of microcracks during creep process of corroded sandstone are analyzed. The test results show that the creep characteristics of rock samples are related to the hydrochemical environment; The medium-and long-term strength of the solution with high pH value is relatively small, and the difference with uniaxial compressive strength is large; Moreover, there is a certain correlation between creep of rock samples and equivalent circuit parameters. In this paper, the influence of creep deformation, mechanical properties and hydrochemical environment on sandstone creep is analyzed, and the research results can provide reference for stability analysis of related geotechnical engineering.

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Induced polarization effect in reservoir rocks and its modeling based on generalized effective-medium theory

Cited by 12 publications

References 32 publications

Correlation between induced polarization and sulfide content of rock samples obtained from seafloor hydrothermal mounds in the Okinawa Trough, Japan

Correlation between induced polarization and sulfide content of rock samples obtained from seafloor hydrothermal mounds in the Okinawa Trough, Japan

Experimental Study of Complex Resistivity Characteristics of a Sandstone Reservoir under Different Measurement Conditions

Experimental Study on Creep of Sandstone under Hydrochemical Corrosion

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