A Global Statistical Correlation between Shear Wave Velocity and Cone Penetration Data

Hegazy, Yasser A.; Mayne, Paul W.

doi:10.1061/40861(193)31

Cited by 38 publications

(53 citation statements)

References 6 publications

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“…; Greenberg and Castagna ) has been employed in case studies 6 and 7. In case study 3, a Vs transform was carried out on CPT data following Hegazy and Mayne () and calibrated against a priori time–depth pairs via a transform to Vp using the Greenberg–Castagna equation. The resulting Vp curve (Vp–Vs) was successfully used to tie CPT data to single‐channel seismic (see Figure ).…”

Section: Discussionmentioning

confidence: 99%

“…Following Mayne et al . () and Hegazy and Mayne (), respectively,

ρ

and Vs transforms were calculated from qt and fs data curves, from which two independent Vp transforms were calculated using the Gardner (Gardner et al . ) and Greenberg–Castagna (Castagna et al .…”

Section: Case Studiesmentioning

confidence: 99%

“…Following Mayne et al (2010) and Hegazy and Mayne (2006), respectively, ρ and Vs transforms were calculated from qt and fs data curves, from which two independent Vp transforms amplitude against the GR curve reveals that there is no particular relationship between the two (Figure 4d).…”

Section: Case Study No 3-geotechnical Cone Penetrometer Test Well-timentioning

confidence: 99%

“…Vs is a necessary component of EI and EEI methodologies, and in the absence of prime Vs data, the Greenberg-Castagna equation (Castagna et al 1985;Greenberg and Castagna 1992) has been employed in case studies 6 and 7. In case study 3, a Vs transform was carried out on CPT data following Hegazy and Mayne (2006) and calibrated Where 3D and 2D data, acquired and processed to image reservoir targets at depth, are employed for MEG purposes, it is assumed that the amplitude response in the top-hole section is relative, rather than AGC corrected and correctly balanced across the stacks, such that amplitude variation across the offset range is accurately preserved. Statistical tests of comparative amplitude response across the angle stack range may be undertaken in order to ascertain the suitability of the dataset for AVO analysis: Figure 11 illustrates one such approach in which the amplitude values for the seabed response across a study area, for each of the four angle stacks comprising the dataset, are averaged and compared.…”

Section: Seismic Inversionmentioning

confidence: 99%

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A petrophysical approach to the investigation of shallow marine geology

Buckley

Cottee

2017

Near Surface Geophysics

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Interpretations of commercial marine shallow seismic data are generally limited to a prognosis of lithologies based on sparse ground truth data and regional stratigraphic models and a probability assessment of encountering perceived geohazards. However, an approach based on analyses of available petrophysical data can provide a more robust assessment of shallow marine lithologies and a more confident interpretation of shallow gas and overpressured formations. Generation of well‐ and borehole‐log acoustic impedance curves provides the starting point for these investigations and, although not all of the requisite data may be present in shallow section wireline suites, the Faust and Gardner equations, and other empirically derived relationships, can supply acceptable mathematical approximations. Impedance inversions of reflection seismic data facilitate more confident interpretations of lithological units, especially when combined with additional datasets such as gamma‐ray, resistivity, porosity, and S‐wave sonic, as elastic and extended elastic inversions. Anomalous seismic events interpreted to represent a probability of encountering shallow gas using traditional interpretation methods may be further investigated using amplitude‐versus‐offset cross‐plotting techniques, including fluid factor calculations, and the potential for overpressured gas accumulations or flow sands may be estimated from velocity‐derived pore pressure calculations. Geological and synthetic seismic modelling exercises provide the opportunity to test petrophysical interpretations in the absence of ground truth control data.

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Section: Discussionmentioning

confidence: 99%

“…Following Mayne et al . () and Hegazy and Mayne (), respectively,

ρ

Section: Case Studiesmentioning

confidence: 99%

Section: Case Study No 3-geotechnical Cone Penetrometer Test Well-timentioning

confidence: 99%

Section: Seismic Inversionmentioning

confidence: 99%

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A petrophysical approach to the investigation of shallow marine geology

Buckley

Cottee

2017

Near Surface Geophysics

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“…In the recent years, several empirical relationships have been developed between q c , q t , and Vs (e.g. [5,6,12,14,15,17,23,28,30,35,38,42]). However, most of these correlations were developed for either sands or clays and generally relatively young deposits [38].…”

Section: Brief Review Of Cpt-basedmentioning

confidence: 99%

Modified correlations to predict the shear wave velocity using piezocone penetration test data and geotechnical parameters: a case study in the southwest of Sweden

Shahri

Naderi

2016

Innov. Infrastruct. Solut.

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Shear wave velocity (V S) is an important geotechnical characteristic for determining dynamic soil properties. When no direct measurements are available, V S can be estimated based on correlations with common in situ tests, such as the piezocone penetration test (CPTu). In the current paper, three modified equations to predict the V S of soft clays based on a comprehensive provided CPTu database and related geotechnical parameters for southwest of Sweden were presented. The performance of the obtained relations were examined and investigated by several statistical criteria as well as graph analyses. The best performance was observed by implementing of corrected cone tip resistance (q t) and pore pressure ratio (B q) which directly can be found from CPTu data. The introduced modifications were developed and validated for available soft clays of the studied area in southwest of Sweden, and thus, their applicability for proper prediction in other areas with different characteristics should be controlled. However, the used method as a suitable tool can be employed to investigate.

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Applicability of soil‐type index for shear wave velocity‐based liquefaction assessment

Ecemis,

Monkul,

Orucu

2024

Earthq Engng Struct Dyn

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The current simplified liquefaction assessment method based on the shear‐wave velocity, Vs has uncertainties about how the fine contents change the Vs‐based liquefaction resistance. According to the simplified method, for a given Vs, the cyclic resistance ratio (CRR) increases with an increase in fine contents. However, field investigations recently revealed that for various silty sands, the correlation between CRR and Vs is soil‐type index dependent and not specific for all sand‐silt mixtures with the same fine contents. Therefore, a detailed experimental research program is performed in this study to clarify the effect of the soil‐type index on the shear wave velocity and CRR correlation. In the first part of the present study, the cyclic resistance of sand mixed with non‐plastic (NP) fines (dry weight of 0%, 5%, 15%, and 35%) was investigated using cyclic direct simple shear (CDSS) tests. Seismic cone penetration (SCPT) tests were performed inside the large‐scale box to facilitate normalized cone penetration resistance (qc1N) and shear wave velocity measurements on the soils used in the CDSS tests. A new correlation was proposed between the qc1N and normalized shear wave velocity (Vs1) using the soil‐type index Ic representing the behavior of soil. Then, CRR‐Vs1 correlation was obtained experimentally for four distinct ranges of soil‐type index. Finally, the results of this study and the proposed CRR‐Vs1 trends in other investigations were used to discuss the soil‐type dependent Vs‐based liquefaction susceptibility zones.

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A Global Statistical Correlation between Shear Wave Velocity and Cone Penetration Data

Cited by 38 publications

References 6 publications

A petrophysical approach to the investigation of shallow marine geology

A petrophysical approach to the investigation of shallow marine geology

Modified correlations to predict the shear wave velocity using piezocone penetration test data and geotechnical parameters: a case study in the southwest of Sweden

Applicability of soil‐type index for shear wave velocity‐based liquefaction assessment

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