Effect of Partial Water Saturation on Attenuation Characteristics of Low Porosity Rocks

Oh, Taemin; Kwon, Tae‐Hyuk; Cho, Gye-Chun

doi:10.1007/s00603-010-0121-6

Cited by 13 publications

(6 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The different behavior of attenuation with respect to the degree of saturation has made the analysis of

\frac{Q_{s}}{Q_{p}}

ratios a useful tool for fluid saturation assessment, especially because of their higher sensitivity as compared to

\frac{v_{p}}{v_{s}}

ratios (Winkler & Nur, ). Porosity, permeability, and pore size are other related rock properties that affect attenuation in porous media (Oh et al, ).…”

Section: Introductionsupporting

confidence: 60%

Spatial and Temporal Variation of Seismic Attenuation During Hydraulic Fracturing of a Sandstone Block Subjected to Triaxial Stress

Rodrı́guez

Stanchits

2017

JGR Solid Earth

View full text Add to dashboard Cite

Q factors estimated with spectral ratios describe the attenuation experienced by seismic arrivals in their travel from the source(s) to the receiver(s). When Q is not the same along the travel path of each arrival, the formulation must incorporate two Q factors making the problem indeterminate. Here we show that by assuming that Q is a random variable, the parameters of its probability distribution can be recovered through a mapping workflow using the spectral ratios. An advantage of such a workflow is that uncertainties in source location and velocity model can also be incorporated by representing these elements as random variables. We apply such a methodology to an acoustic emission (AE) data set from a laboratory experiment of hydraulic fracturing in a Colton sandstone block. We assume that the probability distribution of Q is normal. Anisotropic mean (μQ) values correlate with the triaxial stress conditions imposed at the boundaries of the block, with higher stress corresponding with less attenuation. The μQ values estimated within time intervals in the direction perpendicular to the hydraulic fracture plane correlate with stress buildup at the borehole during fracture propagation and borehole pressure relaxation or drop during fracture closure. The standard deviations (σQ) reflect the attenuation heterogeneity within the sampled regions. An increase in heterogeneity is correlated with pressure buildup at the borehole, which we interpret to reflect a dynamic stress gradient formed from the hydraulic fracture toward the surroundings.

show abstract

“…The different behavior of attenuation with respect to the degree of saturation has made the analysis of

\frac{Q_{s}}{Q_{p}}

ratios a useful tool for fluid saturation assessment, especially because of their higher sensitivity as compared to

\frac{v_{p}}{v_{s}}

ratios (Winkler & Nur, ). Porosity, permeability, and pore size are other related rock properties that affect attenuation in porous media (Oh et al, ).…”

Section: Introductionsupporting

confidence: 60%

Spatial and Temporal Variation of Seismic Attenuation During Hydraulic Fracturing of a Sandstone Block Subjected to Triaxial Stress

Rodrı́guez

Stanchits

2017

JGR Solid Earth

View full text Add to dashboard Cite

show abstract

“…In this study, a theoretical model that considers the saturation level is considered for concrete materials considering groundwater flow in underground conditions. In Biot's model, the P-wave velocity is calculated as follows [23]:…”

Section: Theoretical Models Based On Elastic Wave Characteristics In ...mentioning

confidence: 99%

“…These models were developed by simplifying the Biot's model to estimate the elastic wave characteristics. In addition, a modified Biot's model was suggested based on the saturation level [23].…”

Section: Introductionmentioning

confidence: 99%

Permeability Monitoring of Underground Concrete Structures using Elastic wave Characteristics with Biot’s Model

Lee,

Kim,

Hong

et al. 2024

Preprint

View full text Add to dashboard Cite

Underground environments are preferred for the construction of important infrastructures to overcome social problems, such as the tunnel or disposal of radioactive waste at deep depth. Concrete is primarily used as a structural material owing to its high strength and cost efficiency. To utilize these structures safely in the long term, the permeability of the concrete should be monitored. If the permeability is increased due to crack generation in a concrete medium, groundwater can flow into the underground structure. However, permeability monitoring is challenging at depths of 500 m–1 km under high-temperature, high-pressure, and limited space conditions. In this study, a theoretical model was developed to predict the permeability of concrete using compressive elastic waves. To derive the relationship between the permeability and elastic wave characteristics, Biot’s model, which can associate the characteristics of P-waves with the properties of porous media, was applied. The P-wave velocity and attenuation were investigated according to the permeability of the concrete based on Biot’s model. Subsequently, the concrete specimens were prepared to measure the permeability, P-wave velocity, and attenuation, and the permeability results from the experiment were compared to those obtained from the model for validation. Biot’s model is expected to be useful for permeability monitoring based on the characteristics of the elastic waves in underground structures.

show abstract

“…However, acquiring measurements of attenuation has always been a difficult task in seismology, especially at the long periods of surface waves, particularly because the amplitudes of surface waves are strongly affected by transverse velocity variations, which will produce considerable nonlinear focusing and defocusing effects (Lay & Kanamori, 1985); these effects make it technically difficult to extract anelastic signals from amplitude data. Therefore, the technical development of theoretical models for the mechanisms and laboratory measurements of attenuation continues to lag far behind that of theoretical models of elastic properties (Johnston et al, 1979;Oh et al, 2011). The theory and application of seismic 10.1029/2020GC008971 wave attenuation tomography also remain far less developed than those of velocity tomography (Gung & Romanowicz, 2004).…”

Section: 1029/2020gc008971mentioning

confidence: 99%

Rayleigh Wave Attenuation Tomography in the Crust of the Chinese Mainland

Zhou

Song

Yang

et al. 2020

Geochem Geophys Geosyst

View full text Add to dashboard Cite

In this study, we report a first major effort to measure surface wave amplitudes and to map attenuation structures of the Chinese mainland with dense modern broadband seismic networks in the country. We developed a method of phase‐matched filtering to automatically extract fundamental‐mode Rayleigh waves and to measure the spectral amplitudes. The results are compatible with those from the previous manual method with great improvement in efficiency. Using the automatic method, we extracted a large quantity of the amplitudes of Rayleigh waves at periods of 10 and 20 s recorded by 141 broadband stations from the China Digital Seismograph Network and 656 broadband stations from the China Regional Seismic Network. We performed tomographic inversions using the method of two‐station amplitude ratios and obtained images of the surface wave attenuation maps at periods of 10 and 20 s for the Chinese mainland. The tomographic model resolution reaches 1–2° in central and eastern China, 3–5° in western China, and 5° in the southeastern margin of the Tibetan Plateau and northeastern China. The tomographic results demonstrate good correspondence with geological structures. The distribution of strong historical earthquakes indicates that in the Chinese mainland, these earthquakes occurred mainly in high‐attenuation areas or the junctions between high‐ and low‐attenuation areas.

show abstract

Effect of Partial Water Saturation on Attenuation Characteristics of Low Porosity Rocks

Cited by 13 publications

References 13 publications

Spatial and Temporal Variation of Seismic Attenuation During Hydraulic Fracturing of a Sandstone Block Subjected to Triaxial Stress

Spatial and Temporal Variation of Seismic Attenuation During Hydraulic Fracturing of a Sandstone Block Subjected to Triaxial Stress

Permeability Monitoring of Underground Concrete Structures using Elastic wave Characteristics with Biot’s Model

Rayleigh Wave Attenuation Tomography in the Crust of the Chinese Mainland

Contact Info

Product

Resources

About