Controlling factors of acoustic properties in continental carbonates: Implications for high-resolution seismic imaging

Bailly, Cedric; Kernif, Tarik; Hamon, Youri; Adelinet, M.; Fortin, Jérôme

doi:10.1016/j.marpetgeo.2021.105518

Cited by 4 publications

(11 citation statements)

References 81 publications

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“…(2022) (samples ≥95% carbonate), and Bailly et al. (2022) (facies F5, F6, F8, F9). Shrub data from Regnet et al.…”

Section: Resultsmentioning

confidence: 99%

“…All datasets diverge to higher V p values from time average curves, and this divergence is most prominent in continental tufas and travertines (Figure 6; Bailly et al, 2022;Soete et al, 2015). In the ITMC, mineralogy is predominantly calcite, and thus the large velocity and impedance variation cannot relate to mineralogical variations, such as clay minerals, which are commonly invoked for marine and lacustrine carbonates (Bailly et al, 2022 Reijmer et al, 2022;Weger et 2009). Instead, velocity variations are probably a function of changes in rock fabric, pore type and pore geometry (Anselmetti & Eberli, 1993;Weger et al, 2009).…”

Section: Controls On Petrophysical and Acoustic Propertiesmentioning

confidence: 97%

“…The latter point is particularly true for continental carbonates. The dependency of porosity measurements on the reference volume being investigated has been recognised in reservoir petrophysics (Bailly et al, 2022;Fitch et al, 2015;Frykman & Deutsch, 2002) and GPR studies . Combination of analytical techniques at several scales of observation is therefore important for coherent characterisation of subsurface properties.…”

Section: Controls On Petrophysical and Acoustic Propertiesmentioning

confidence: 99%

“…This is non‐trivial in carbonate rocks where impedance variations depend less on compositional changes, but—since all carbonate minerals have similar elastic properties—on complex and interrelated variations in fabric, porosity, pore type, pore geometry and diagenesis (Anselmetti & Eberli, 1993; Weger et al., 2009). An increasing body of literature has examined the controls on carbonate seismic response (Anselmetti & Eberli, 1993; Eberli et al., 2003; Weger et al., 2009), including the use of micro‐computed tomography (microCT), nuclear magnetic resonance and pore network analysis to quantify controlling factors (Archilha et al., 2016; Bailly et al., 2022; Reijmer et al., 2022; Ronchi & Cruciani, 2015; Soete et al., 2015; Vasquez et al., 2019; Weger et al., 2009). Analogue data sets from buried carbonate systems as well as outcrops provide 2D and 3D constraints on geobodies and their seismic response.…”

Section: Introductionmentioning

confidence: 99%

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Characterising the heterogeneous nature of tufa mounds by integrating petrographic, petrophysical, acoustic and electromagnetic measurements

Schröder,

Corella,

Pellicer

et al. 2023

The Depositional Record

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Determination of the physical properties of subsurface geological bodies is essential for georesource management and geotechnical applications. In the absence of direct measurements, this usually passes via geophysical methods such as seismic and ground‐penetrating radar. These require conversion to physical properties, and measurements at different scales to test for consistency. This approach is non‐trivial in geobodies with heterogeneous patterns of properties. Tufa mounds—in‐situ terrestrial carbonate buildups precipitating from geothermal waters—are characterised by high contrasts in facies and petrophysical properties from microscale to macroscale, and are therefore ideally suited to test the ability of non‐invasive geophysical methods to estimate such contrasts, and to develop petrophysical models based on geophysical properties. Here, a laboratory‐based study of a Pleistocene tufa mound in Spain is presented that combines (1) petrography, (2) digital 2D pore network analysis, (3) gas porosity and permeability measurements, (4) acoustic velocity measurements and (5) electromagnetic wave velocity and porosity determination from ground‐penetrating radar, to develop empirical petrophysical models. These results show the consistency of petrophysical properties determined with different methods across various observational scales. Electromagnetically derived porosity positively correlates with gas porosity. Petrophysical properties depend on measurable rock fabric parameters and the degree of cementation, which provide predictive tools for subsurface geobodies. Strongly cemented peloidal‐thrombolitic fabrics with intergranular and intercrystalline pores, and a dominance of small complex pores best transmit acoustic waves. Weak cementation and a significant fraction of large simple pores (framework, vegetation moulds) increase porosity and permeability of shrubby fabrics, while causing lower acoustic velocity. This study demonstrates that ground‐penetrating radar models can be used in combination with direct measurements of physical subsurface properties to capture highly contrasting physical properties associated with different sedimentary facies that would not be achievable with other methods, thus improving the understanding of formational processes.

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“…(2022) (samples ≥95% carbonate), and Bailly et al. (2022) (facies F5, F6, F8, F9). Shrub data from Regnet et al.…”

Section: Resultsmentioning

confidence: 99%

Section: Controls On Petrophysical and Acoustic Propertiesmentioning

confidence: 97%

Section: Controls On Petrophysical and Acoustic Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characterising the heterogeneous nature of tufa mounds by integrating petrographic, petrophysical, acoustic and electromagnetic measurements

Schröder,

Corella,

Pellicer

et al. 2023

The Depositional Record

View full text Add to dashboard Cite

show abstract

“…The velocity values vary within these beds, whereas the porosity remains relatively low (4%–7%). This can be explained by the homogenization effect of diagenesis that masks the contrasts related to the vertical variation of facies (Bailly et al., 2022). Finally, sections that are characterized by vast variations of physical properties result in rapid succession of beds with high AI contrasts.…”

Section: Discussionmentioning

confidence: 99%

Seismic characterization of Cenomanian–Turonian carbonate platform based on sedimentological and geophysical investigation of onshore analogue outcrop (northern Lebanon)

Abbani

Adelinet

Inati

et al. 2023

Geophysical Prospecting

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Outcrop analogues play a key role in the characterization of subsurface carbonate platforms. The lack of well data and relevant outcrop analogues can result in the misinterpretation of seismic data. To address this issue, we apply an integrated workflow based on sedimentology, geophysics and petrophysics on outcrop analogues present onshore Lebanon, to constrain the carbonate platform's properties on onshore seismic data. A thorough sedimentary description is completed for a 400‐m‐thick Cenomanian–Turonian carbonate platform located in Kfarhelda, northern Lebanon. P‐wave velocity is acquired directly on the outcrop, and the petrophysical properties are measured on 44 samples. A 1D synthetic seismogram is computed with Ricker wavelet 25 Hz resembling seismic resolution. The resulting reflectors are mainly (1) high amplitude reflectors at the limit between two facies with contrasting physical properties enhanced by diagenesis, (2) moderate amplitude reflectors corresponding to stratigraphic limits at the transition between facies and (3) very low amplitude reflectors in karstified units. The integration of outcrop and seismic data is based on the generation of the synthetic seismogram to identify the geological origin of reflectors. The best fit between the synthetic seismic and seismic profile is used to interpret a seismic facies representing bedded limestones of Sannine and Maameltain formations (Cenomanian–Turonian). Two other distinctive reflectors are identified at the boundary of the Marly Limestone Zone, and the Channel facies unit characterized by bioclastic packstone to floatstone. This study highlights the importance of using outcrop analogues to identify the seismic signal of stratigraphic sequences and improve the interpretation of onshore seismic data.

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A modified method of multiple point geostatistics for spatial simulation of sedimentary facies for carbonate reservoirs

Zhang

Ren

et al. 2023

Journal of Applied Geophysics

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Controlling factors of acoustic properties in continental carbonates: Implications for high-resolution seismic imaging

Cited by 4 publications

References 81 publications

Characterising the heterogeneous nature of tufa mounds by integrating petrographic, petrophysical, acoustic and electromagnetic measurements

Characterising the heterogeneous nature of tufa mounds by integrating petrographic, petrophysical, acoustic and electromagnetic measurements

Seismic characterization of Cenomanian–Turonian carbonate platform based on sedimentological and geophysical investigation of onshore analogue outcrop (northern Lebanon)

A modified method of multiple point geostatistics for spatial simulation of sedimentary facies for carbonate reservoirs

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