The correlations between the saturated and dry P-wave velocity of rocks

Kahraman, S.

doi:10.1016/j.ultras.2007.05.003

Cited by 149 publications

(76 citation statements)

References 25 publications

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“…In general, we observe that the high value of the P-wave velocity is obtained for the samples saturated and the low value is obtained for dry samples. The authors Boulanouar et al [22,23], Kahraman [24], Gué-guen et al [25] and Oghenero [26] compared the velocities P-wave in dry and water saturated states. They observed generally that V P (dry) < V P (saturated).…”

Section: Resultsmentioning

confidence: 99%

“…Sedimentary rocks at high velocity are often carbonates and at low velocity of the sandstones or marnes [24]. On the other hand, the velocities of rocks are controlled by those minerals, but up to a certain point only.…”

Section: A Rahmouni Et Almentioning

confidence: 99%

“…On the other hand, the velocities of rocks are controlled by those minerals, but up to a certain point only. In this case, the material contains mainly calcite whose P-wave velocity is 6.65 km/s [24] and secondary minerals (Fe, Mg, P). The variations come then from the variability of the porosity and the presence of secondary minerals whose velocity and density can be high (for iron V P is 1.4 km/s), in this case the velocity and density increase together (Figures 5 and 6).…”

Section: A Rahmouni Et Almentioning

confidence: 99%

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Prediction of Porosity and Density of Calcarenite Rocks from P-Wave Velocity Measurements

Rahmouni¹,

Boulanouar²,

Boukalouch³

et al. 2013

IJG

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Petrophysical proprieties such as porosity, density, permeability and saturation have a marked impact on acoustic proprieties of rocks. Hence, there has been recently a strong incentive to use new geophysical techniques to invert such properties from seismic or sonic measurements for rocks characterization. The P-wave velocity, which is non-destructive and easy method to apply in both field and laboratory conditions, has increasingly been conducted to determine the geotechnical properties of rock materials. The P-wave velocity of a rock is closely related to the intact rock properties, and we have been measuring the velocity in rock masses and describe the rock structure and texture. The present work deals with the use of a simple and non-destructive technique, ultrasonic velocity, to predict the porosity and density of calcarenite rocks that are characteristic in historical monument. The ultrasonic test is based on measuring the propagation time of a P-wave in the longitudinal direction. Good correlations between P-wave velocity, porosity and density were found, which indicated them as an appropriate technique for estimating the porosity and density.

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Section: Resultsmentioning

confidence: 99%

Section: A Rahmouni Et Almentioning

confidence: 99%

Section: A Rahmouni Et Almentioning

confidence: 99%

See 1 more Smart Citation

Prediction of Porosity and Density of Calcarenite Rocks from P-Wave Velocity Measurements

Rahmouni¹,

Boulanouar²,

Boukalouch³

et al. 2013

IJG

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“…Laboratory measurements of dry specimens will give lower velocities than those of fully saturated samples (Nur and Simmons, 1969). Kahraman (2007) showed that for sedimentary rocks there is a strong linear correlation between P wave velocities of dry v d p and saturated rocks v w p . Most rocks show significant trends of UCS reduction with increasing degree of saturation (Shakoor and Barefield, 2009;Karakul and Ulusay, 2013).…”

Section: Applicability Of Empirical Relations To Predict In Situ Rockmentioning

confidence: 99%

Empirical relations of rock properties of outcrop and core samples from the Northwest German Basin for geothermal drilling

Reyer

Philipp

2014

Geoth. Energ. Sci.

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Abstract. Information about geomechanical and physical rock properties, particularly uniaxial compressive strength (UCS), are needed for geomechanical model development and updating with logging-while-drilling methods to minimise costs and risks of the drilling process. The following parameters with importance at different stages of geothermal exploitation and drilling are presented for typical sedimentary and volcanic rocks of the Northwest German Basin (NWGB): physical (P wave velocities, porosity, and bulk and grain density) and geomechanical parameters (UCS, static Young's modulus, destruction work and indirect tensile strength both perpendicular and parallel to bedding) for 35 rock samples from quarries and 14 core samples of sandstones and carbonate rocks.With regression analyses (linear-and non-linear) empirical relations are developed to predict UCS values from all other parameters. Analyses focus on sedimentary rocks and were repeated separately for clastic rock samples or carbonate rock samples as well as for outcrop samples or core samples. Empirical relations have high statistical significance for Young's modulus, tensile strength and destruction work; for physical properties, there is a wider scatter of data and prediction of UCS is less precise. For most relations, properties of core samples plot within the scatter of outcrop samples and lie within the 90 % prediction bands of developed regression functions. The results indicate the applicability of empirical relations that are based on outcrop data on questions related to drilling operations when the database contains a sufficient number of samples with varying rock properties. The presented equations may help to predict UCS values for sedimentary rocks at depth, and thus develop suitable geomechanical models for the adaptation of the drilling strategy on rock mechanical conditions in the NWGB.

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“…They concluded that their method could be used to estimate and predict the properties of the subsurface material in order to reduce the cost of subsurface investigation. Altindag [4], Kahraman [5] and Yagiz [6], on the other hand, studied the relationship between P-wave velocity and mechanical properties of sedimentary rocks. The latter used already acquired data and a simple regression analysis.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Geotechnical Parameters using Geophysical Data

Adewoyin

Joshua

Akinwumi

et al. 2017

J. Eng. Technol. Sci.

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Abstract. The financial implications and the time required for carrying out a comprehensive geotechnical investigation to characterize a site can discourage prospective private residential building developers, especially where a large area of land is to be investigated for construction purposes. Also, most of the geotechnical test procedures utilized during site investigation only provide information on points tested in the subsurface. This research method suggests an approach of investigating the subsurface condition of a site in order to obtain key subsoil geotechnical properties necessary for foundation design for proposed engineering facilities. Seismic wave velocities generated from near surface refraction were combined with percussion drilling and cone penetration tests to obtain a comprehensive geotechnical investigation. From the results of the seismic refraction method, the bulk density of the soil, Young's modulus, bulk modulus, shear modulus and allowable bearing capacity of a competent layer that can bear structural load at the particular study site were determined. The most competent layer was found within the depth observed by geotechnical methods. In addition, regression equations were developed in order to directly obtain the bulk density of the soil, Young's modulus, bulk modulus, shear modulus and allowable bearing capacity from the primary wave velocities.

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The correlations between the saturated and dry P-wave velocity of rocks

Cited by 149 publications

References 25 publications

Prediction of Porosity and Density of Calcarenite Rocks from P-Wave Velocity Measurements

Prediction of Porosity and Density of Calcarenite Rocks from P-Wave Velocity Measurements

Empirical relations of rock properties of outcrop and core samples from the Northwest German Basin for geothermal drilling

Evaluation of Geotechnical Parameters using Geophysical Data

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