Static and Dynamic Bulk Moduli of Deepwater Reservoir Sands: Influence of Pressure and Fluid Saturation

Wang, Yang; Han, De‐hua; Li, Hui; Teng, Lidong

doi:10.2113/2022/4266697

Cited by 5 publications

(5 citation statements)

References 49 publications

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“…The static bulk modulus symbolizes the mechanical firmness of subsurface basins (Zimmer, 2004;Zoback, 2007). The dynamic moduli can be examined from seismic or well logging data (Fjaer, 2019;Wang et al, 2022). It may be determined using Equation 5.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

The formation young’s modulus and textural attributes of the Axx-field from southern Niger delta, Nigeria

Joseph Gordian ATAT,

Emmanuel Bassey UMOREN,

Akaninyene Okon AKANKPO

et al. 2024

Int. J. Sci. Res. Updates

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This research was carried out to determine the formation brittleness and textural attributes of an Axx-Field in the Niger Delta Basin. Data available for this study were obtained from three wells (A11, A22 and A33). They were analyzed using Microsoft Excel after spurious values were removed. Two techniques (John Fuller and Plumb Bradford) were used to determine static young's modulus but only one is reported because after statistical analysis on both, the one reported was adequate for accurate outcomes although both approaches have low variance. The results indicates that the highest values of static and dynamic young's modulus are 2.05 x 1025N/m2 and 1.93 x 1010N/m2 respectively. The lowest values are 1.1 x 1024N/m2 and 8.5 x 109N/m2 respectively for well A11. The average values are 1.024 x 1025N/m2 and 5.25 x 1023N/m2 for this well. For well A22, the highest and lowest values of dynamic young’s modulus are 1.5848 x 1010N/m2 and 1.5726 x 1010N/m2 while those of static are correspondingly 1.47 x 1025N/m2 and 9.01 x 1014N/m2. Their average values are 1.5787 x 1010N/m2 and 7.35 x 1024N/m2 for dynamic and static young's moduli respectively. Also, for well A33, dynamic has the lowest value as 3.28 x 1010 N/m2; static has 8.36 x 1014N/m2 and their highest correspond to 2.04 x 1010N/m2 and 7.08 x 1025N/m2. The average value for this well are 2.66 x 1010N/m2 and 3.54 x 1025 N/m2 for dynamic and static respectively. The static Young's modulus results define the formation as brittle, whose environment is extremely poorly sorted, very fine skewed and very leptokurtic with low energy for well A11, very poorly sorted, fine skewed and platykurtic for well A22, extremely poorly sorted, very fine skewed and mesokurtic for well A33.

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Section: Theoretical Backgroundmentioning

confidence: 99%

The formation young’s modulus and textural attributes of the Axx-field from southern Niger delta, Nigeria

Joseph Gordian ATAT,

Emmanuel Bassey UMOREN,

Akaninyene Okon AKANKPO

et al. 2024

Int. J. Sci. Res. Updates

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“…Many Researchers have worked on bulk modulus; to highlight some findings, Cheng and Johnston (1981) have worked on the static-to-dynamic bulk modulus ratio for dry Navajo and Berea sandstones which differs from about 0.5 at atmospheric pressure to about unity at 200 x 10 6 Pa. Also, Jizba and Nur (1990) concluded that the static bulk modulus is nearly the value of the dynamic modulus at high-stress levels and might decrease to about 50% value of the dynamic bulk modulus at low-stress levels from dry tight gas sandstones constituents (Wang et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Bulk modulus is one of the mechanical properties used in several geoengineering problems (Wang et al, 2022;Bock, 1993;Bell, 1996;Andhumoudine, 2021;Yang and Liu, 2021) and it could be obtained by the stress-strain relation (like static measurement) or the propagating elastic wave velocities (such as dynamic measurement) (Wang et al, 2020). The static bulk modulus symbolizes the mechanical firmness of subsurface basins (Zimmer, 2004;Zoback, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…The static bulk modulus symbolizes the mechanical firmness of subsurface basins (Zimmer, 2004;Zoback, 2007). The dynamic moduli can be generally obtainable from seismic or well logging data (Fjaer, 2019;Wang et al, 2022). Mechanical properties of rocks include elastic properties (such as E, 𝜎, 𝜇, K, Cb and SPI) and inelastic properties (like UCS, τ, Sv, Shmax and Shmin and Hp) properties.…”

Section: Introductionmentioning

confidence: 99%

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Modelling of bulk modulus from sand [API <75]-shale [API >75] lithology for XA field in the Niger Delta Basin

Atat JG,

Essiett AA,

Ekpo SS

et al. 2023

World J. Adv. Res. Rev.

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Modelling of bulk modulus from sand-shale lithology has been researched. This is to come up with a model than relates the bulk modulus with the Lame’s first parameter. Data adequate for this finding were obtained from three Niger Delta oil wells A, B and C. Microsoft Excel was used for all stages of analysis. The result indicates the average values of Poisson’s ratio and Vp/Vs ratio as 0.5 and 1.637 respectively for all wells. Other results include the depth range of about 5300ft to 6600ft; shear modulus varies from 4.05 x 109 to 11 x 109N/m2; the range of result of young modulus varies from 1.21 x 1010 to 3.18 x 1010N/m2; Lame’s first parameter range from 2.75 x 109 to 7.20 x 109N/m2; bulk modulus values are within 1.08 x 1010 to 2.84 x 1010N/m2; the elastic parameters with peak values are noted at the depth of 6200ft for well A. For well B, the results indicate the depth of investigation as 8300ft to 10000ft; shear modulus varies from 5.76 x 109 to 10.00 x 109N/m2; the range of young modulus varies from 1.73 x 1010 to 3.04 x 1010N/m2; Lame’s first parameter range from 3.90 x 109 to 6.87 x 109N/m2; bulk modulus values are 1.54 x 1010 to 2.71 x 1010N/m2; the elastic parameters with maximum values are recorded at the depth of about 9900ft. For well C, the depth ranges from 5200ft to 8200ft; shear modulus varies from 7.84 x 109 to 1.35 x 1013 N/m2; the range of result of young modulus varies from 2.35 x 1010 to 4.04 x 1013N/m2; Lame’s first parameter range from 5.32 x 109 to 9.14 x 1012N/m2; bulk modulus values are within 1.05 x 1010 to 1.81 x 1013N/m2; the elastic parameters with peak values are noted at the depth of 8200ft. The relationship between bulk modulus and Lame’s first parameter obtained is K = 3.9455λ or (K = 4λ). Lame’s first parameter analysis could permit a better resolution of potential hydrocarbon zones; therefore, in a linear relationship with bulk modulus of about 1.0 correlation coefficient would yield a model which is adequate for mapping of hydrocarbon accumulation.

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“…Moreover, the SCS is a typical deep-water basin, exhibiting high pressure and temperature characteristics. Therefore, the rock physical characteristics in SCS might be different from that of other well-studied marginal seas (e.g., Gulf of Mexico, North Sea), hence affecting its corresponding elastic signatures (Wang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Rock physics characteristics of marine sediments in the South China sea: The link between the geological factors and elastic properties

Hussein

Han²,

Chen³

et al. 2023

Front. Earth Sci.

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Understanding the geological factors behind the physical and elastic properties of marine sediments and unconsolidated rock is essential for the interpretation of geophysical measurements, hazard assessment, and ocean engineering applications. Core and well logging data from the six drilling sites of the Ocean Drilling Program/International Ocean Discovery Program (ODP/IODP) were used to analyze the rock physical characteristics in the South China sea. The depositional environment plays a significant role in affecting the physical properties of marine sediments. The sediments deposited under shallow water conditions show a higher velocity than the basin, slope, and deeper shelf carbonate deposits. Moreover, the non-depositional hiatus along the Oligocene-Miocene boundary displays a notable control on the variation of rock physical properties. It is found that the lithofacies and physical compaction remarkably influence the elastic characteristics of P-impedance and Vp/Vs ratio. The calcareous-rich sediment and ooze have very low P-impedance and high Vp/Vs ratio, whereas the siltstone and coarse sand present high P-impedance and low Vp/Vs ratio characteristics. With the enhancement of the consolidation degree, the Vp/Vs ratio significantly decreases from 6 to less than 2, suggesting that the shear wave velocity is highly sensitive to physical compactions. The basalt at site U1431 is considerably lower in its P-wave velocity than that at the site of U1433, which is probably caused by the intense fracturing occurring at the site of U1431 associated with different tectonic environments. We establish the link between geological factors and elastic characteristics of marine sediments of SCS, laying the foundation for characterizing depositional environments, lithofacies, and compaction degrees using geophysical measurements.

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Static and Dynamic Bulk Moduli of Deepwater Reservoir Sands: Influence of Pressure and Fluid Saturation

Cited by 5 publications

References 49 publications

The formation young’s modulus and textural attributes of the Axx-field from southern Niger delta, Nigeria

The formation young’s modulus and textural attributes of the Axx-field from southern Niger delta, Nigeria

Modelling of bulk modulus from sand [API <75]-shale [API >75] lithology for XA field in the Niger Delta Basin

Rock physics characteristics of marine sediments in the South China sea: The link between the geological factors and elastic properties

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