Measurements of acoustic wave velocities and attenuation in marine sediments

Turgut, Altan; Yamamoto, Tokuo

doi:10.1121/1.399084

Cited by 95 publications

(45 citation statements)

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“…Their results show that inertial effects exist for short distances and high permeabilities. Turgut and Yamamoto (1990) studied attenuation of acoustic waves in fluid saturated sediments and obtained good agreement between the experimental and theoretical results. This enabled the remote estimation of porosity and permeabiUty of marine sediments by using measured compressional and shear wave characteristics.…”

Section: Use Of Wave Propagation Equation To Estimate Permeabilitymentioning

confidence: 80%

Chapter 5 Propagation of waves in porous media

Çorapçıoplu

Tuncay

1996

Advances in Porous Media

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Wave propagation in porous media is of interest in various diversified areas of science and engineer ing. The theory of the phenomenon has been studied extensively in soil mechanics, seismology, acoustics, earthquake engineering, ocean engineering, geophysics, and many other disciplines. This review presents a general survey of the Hterature within the context of porous media mechanics. Following a review of the Biot's theory of wave propagation in Unear, elastic, fluid saturated porous media which has been the basis of many analyses, we present various analytical and numerical solutions obtained by several researchers. Biot found that there are two dilatational waves and one rotational wave in a saturated porous medium. It has been noted that the second kind of dilatational wave is highly attenuated and is associated with a diffusion type process. The influence of couphng between two phases has a decreasing effect on the first kind wave and an increasing effect on the second wave. Procedures to predict the hquefaction of soils due to earthquakes have been reviewed in detail. Extension of Biot's theory to unsaturated soils has been discussed, and it was noted that, in general, equations developed for saturated media were employed for unsaturated media by replacing the density and compressibility terms with modified values for a water-air mixture. Various approaches to determine the permeabihty of porous media from attenuation of dilatational waves have been described in detail. Since the prediction of acoustic wave speeds and attenuations in marine sediments has been extensively studied in geophysics, these studies have been reviewed along with the studies on dissipation of water waves at ocean bottoms. The mixture theory which has been employed by various researchers in continuum mechanics is also discussed within the context of this review. Then, we present an alternative approach to obtain governing equations of wave propagation in porous media from macro scopic balance equations. Finally, we present an analysis of wave propagation in fractured porous media saturated by two immiscible fluids.

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Section: Use Of Wave Propagation Equation To Estimate Permeabilitymentioning

confidence: 80%

Chapter 5 Propagation of waves in porous media

Çorapçıoplu

Tuncay

1996

Advances in Porous Media

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“…Several reports of reasonably good agreement between experimental data and theoretical curves of velocity and attenuation dispersion vs. frequency predicted by the Biot model are available in the literature (Keller 1989;Yamamoto et al 1994). Many investigators agree that this theory can be adequately used to model acoustic wave propagation in water-saturated unconsolidated sand (Stoll 1980;Turgut and Yamamoto 1988;Turgut and Yamamoto 1990) or in highly permeable sediments (Geli et al 1987). It is, however, important to note that the basic formulation of the theory explicitly assumes long wavelength disturbances in comparison with the dimensions of the macroscopic elementary volume considered in the formulation of the theory and hence very large disturbances in comparison with the elementary pore size where microscopic flow occurs.…”

Section: Physics Of Acoustic Measurementsmentioning

confidence: 99%

Evaluation of Non-Nuclear Techniques for Well Logging: Technology Evaluation

Bond¹,

Denslow²,

Griffin³

et al. 2010

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Sealed, chemical isotope radiation sources have a diverse range of industrial applications. There is concern that such sources currently used in the gas/oil well logging industry (e.g., americium-beryllium [AmBe], 252 Cf, 60 Co, and 137 Cs) can potentially be diverted and used in dirty bombs. Recent actions by the U.S. Department of Energy (DOE) have reduced the availability of these sources in the United States. Alternatives, both radiological and non-radiological methods, are actively being sought within the oilfield services community. The use of isotopic sources can potentially be further reduced, and source use reduction made more acceptable to the user community, if suitable non-nuclear or non-isotope-based well logging techniques can be developed. Data acquired with these non-nuclear techniques must be demonstrated to correlate with that acquired using isotope sources and historic records. To enable isotopic source reduction there is a need to assess technologies to determine (i) if it is technically feasible to replace isotopic sources with alternate sensing technologies and (ii) to provide independent technical data to guide DOE (and the Nuclear Regulatory Commission [NRC]) on issues relating to replacement and/or reduction of radioactive sources used in well logging.This report presents an initial review of the state-of-the-art nuclear and non-nuclear well logging methods and seeks to understand the technical and economic issues if AmBe, and potentially other isotope sources, are reduced or even eliminated in the oil-field services industry. Prior to considering alternative logging technologies, there is a definite need to open up discussions with industry regarding the feasibility and acceptability of source replacement. Industry views appear to range from those who see AmBe as vital and irreplaceable to those who believe that, with research and investment, it may be possible -to transition to electronic neutron sources and employ combinations of non-nuclear technologies to acquire the desired petro-physical parameters. In one sense, the simple answer to the question as to whether petro-physical parameters can be sensed with technologies other than AmBe is probably "Yes". The challenges come when attention turns to record interpretation. The many decades of existing records form a very valuable proprietary resource, and the interpretation of subtle features contained in these records are of significant value to the oil-gas exploration community to correctly characterize a well. The demonstration of equivalence and correspondence/correlation between established and any new sensing modality, and correlations with historic records is critical to ensuring accurate data interpretation. Establishing the technical basis for such a demonstration represents a significant effort.The focus of this study is the understanding of the technical obstacles that hinder the replacement of and the disadvantages from the loss of extensive interpretation experience based on data accumulated with AmBe. Enhanced ac...

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“…Based on Turgut and Yamamoto [10], the bulk modulus of skeletal frame K b and the porosity Ф are related to the shear modulus as…”

Section: Metodolgymentioning

confidence: 99%

Water Saturation Estimation Using Crossplot Method Based on Turgut- Yamamoto Equation

Sismanto¹

2017

IJET

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Abstract-Hydrocarbon reservoirs are characterized by reservoir parameters such as porosity, permeability, and water saturation. There is a close relationship among wave parameters, elastic parameters, and rock properties, and ultimate reservoir parameters have been established in continuum mechanics and rock physics. Therefore, one should be able to determine the reservoir parameters, especially water saturation from seismic waveforms. We used Biot's equation of elastic wave propagation in porous and fluid saturated medium. The approximations of Turgut-Yamamoto had simplified Biot's formula to obtain the relationship between attenuation and water saturation and then make it in linear form, thus it can be used as standard curves. The linearization Turgut-Yamamoto standard curve is more obvious to the dependency of attenuation to water saturation. To test the method, we used a log data from "BARRETTA" Well in North Sumatera Basin. Total thick of the prospect zone on KTP Formation is about 72 ft. The error of water saturation estimation by the cross-plot method in standard curves to log analysis on the prospect zone of KTP Formation is about 3%.

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Measurements of acoustic wave velocities and attenuation in marine sediments

Cited by 95 publications

References 1 publication

Chapter 5 Propagation of waves in porous media

Chapter 5 Propagation of waves in porous media

Evaluation of Non-Nuclear Techniques for Well Logging: Technology Evaluation

Water Saturation Estimation Using Crossplot Method Based on Turgut- Yamamoto Equation

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