Rock Physics Template Application on Carbonate Reservoir

Hilman, Judy; Winardhi, Ignatius Sonny

doi:10.1088/1755-1315/318/1/012006

Cited by 3 publications

(5 citation statements)

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“…Instead, it focuses on a classification analysis of elastic parameters in relation to petrophysical parameters, reservoir fluid saturation, and lithofacies characteristics for the preliminary characterization of a carbonate reservoir. Similar analyses concerned the classification based on the interparametric relationship applied in wellbore profile analyses, e.g., [10,26], utilized in seismic data analysis e.g., [27][28][29], or facies modeling in 3D grids, e.g., [30]. The underlying concept of this approach is to capture the interparametric relationships, which will be reflected in subsequent, more detailed stages of reservoir characterization.…”

Section: Methodsmentioning

confidence: 99%

“…This technique was proposed by Odegaard and Avseth [8] based on Dvorkin and Nur's theory [9], which suggests that mineral and fluid content in reservoir rocks can be predicted based on a cross-plot of the Vp/Vs ratio and AI. This method is mainly applied in granular rocks, yielding more predictable results [10]. While in sandstone rocks, the templates differentiate zones with increased porosity and fluid saturation quite distinctly, in carbonate rocks, due to the complex pore system and diverse pore geometry, the application of this method has limitations primarily due to the scattering of the relationship between porosity and P-wave velocity [10].…”

Section: Introductionmentioning

confidence: 99%

“…This method is mainly applied in granular rocks, yielding more predictable results [10]. While in sandstone rocks, the templates differentiate zones with increased porosity and fluid saturation quite distinctly, in carbonate rocks, due to the complex pore system and diverse pore geometry, the application of this method has limitations primarily due to the scattering of the relationship between porosity and P-wave velocity [10]. This work attempts to investigate the relationship between various parameters of rock physics templates and apply the observed dependencies in three-dimensional parametric models.…”

Section: Introductionmentioning

confidence: 99%

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Integration of Well Logging and Seismic Data for the Prognosis of Reservoir Properties of Carbonates

Kaczmarczyk-Kuszpit,

Sowiżdżał

2024

Energies

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Due to the complex nature of the pore system and the diversity of pore types, carbonate rocks pose a challenge in terms of their spatial characterization. Unlike sandstones, permeability in carbonates is often not correlated conclusively with porosity. A methodology for preliminary qualitative spatial characterization of reservoirs in carbonate rocks is presented in this article, with a focus on interparametric relationships. It endeavors to apply this methodology to a reservoir situated within the Main Dolomite formation in the Polish Lowlands. Fundamental analyses rely on data plotted within rock physics templates (RPT), specifically, cross-plots of acoustic impedance as a function of the product of compressional and shear wave velocities in well log profiles. The analysis of interparametric relationships was conducted on well log profiles and subsequently integrated with seismic data using neural network techniques. Areas with the greatest potential for hydrocarbon accumulation and areas potentially exhibiting enhanced reservoir properties were identified based on the outcomes of the well log profile analysis and parametric models. The qualitative assessment of the reservoir, rooted in interparametric dependencies encompassing lithofacies characteristics and elastic and petrophysical parameters, together with reservoir fluid saturation, forms the basis for further, more detailed reservoir analysis, potentially focusing on fracture modeling.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Integration of Well Logging and Seismic Data for the Prognosis of Reservoir Properties of Carbonates

Kaczmarczyk-Kuszpit,

Sowiżdżał

2024

Energies

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“…They used the Biot-Rayleigh theory and predicted the porosity and water saturation. Hilman and Winardhi (2019) used the Kuster-Toksöz and Gassmann model to construct a RPT for a carbonate reservoir in the South Sumatra Basin. They suggested that the aspect ratio of the porosities and the elastic modulus of minerals should be identified for a more useful application of RPTs in carbonate reservoirs.…”

Section: Introductionmentioning

confidence: 99%

Construction of 2D and 3D rock physics templates for quantitative prediction of physical properties of a carbonate reservoir in SW of Iran

Rahmani

Niri

Jozanikohan

2022

J Petrol Explor Prod Technol

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The characterization of carbonate rocks is not straightforward, as they often experience complex diagenetic processes causing them to expose wide variations in pore types. This research aims to characterize the properties of a carbonate reservoir with a complicated porous structure through rock physics principles and tools. Two representative wells from an oil field located in SW of Iran were selected, and two-dimensional (2D) and three-dimensional (3D) rock physics templates (RPTs) were constructed by employing the appropriate rock physics models. The porosity, water saturation, and pore type are considered reservoir parameters affecting carbonate rock's elastic properties and indicating the reservoir quality. The 2D RPTs described variations in two reservoir parameters in terms of elastic properties. However, they were not able to simultaneously characterize all three reservoir parameters. The proposed 3D RPTs revealed the underlying relationship of elastic properties with pore aspect ratio, water saturation, and porosity. To validate the constructed RPTs, well logging data, scanning electron microscope images, and thin section images were utilized. The RPTs were also employed to predict the reservoir properties quantitatively, and these predictions were compared with the petrophysical data. The average errors of the predicted porosity and water saturation by 3D RPT were, respectively, 1.22% and 6.66% for well A, and 2.65% and 8.18% for well B. The 2D RPTs provided three sets of predictions for porosity and water saturation (considering three specific pore aspect ratios of 0.03, 0.1, and 0.5), all with higher average errors compared to the predictions by 3D RPT for both wells. The obtained results proved that 3D RPT could predict reservoir properties more accurately. Finally, based on the estimated values of pore aspect ratio, water saturation, and porosity using 3D RPTs, the reservoir under study was divided into distinct depth intervals, and a quality level was assigned to each interval. The introduced rock physics-based procedure for a carbonate reservoir characterization could increase the reliability in predicting the reservoir properties, enhance the ability to detect the reservoir fluid, and thereby reduce the interpretation risk.

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“…Rock physics templates (RPTs) have been developed for sandstone reservoirs (Avseth et al 2000(Avseth et al , 2010Singha and Chatterjee 2017) and carbonate reservoirs (Yu et al 2014;Hilman and Winardhi 2019) to guide seismic inversion interpretation results for reservoir characterization and fluid identification, but no RPT for an unconventional reservoir with a blend of siliciclastic and carbonate rock has been developed. For sandstone reservoir, rock physics models like the constant cement model (Avseth et al 2000), the contact cement model , and the friable sand model has been developed.…”

Section: Introductionmentioning

confidence: 99%

Pore morphology effect on elastic and fluid flow properties in Bakken formation using rock physics modeling

Ozotta

Saberi²,

Kolawole

et al. 2022

Geomech. Geophys. Geo-energ. Geo-resour.

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Unconventional geo-resources are critical due to their important contributions to energy production. In this energy transition and sustainability era, there is an increased focus on CO2-enhanced oil recovery (CO2-EOR) and geological CO2 storage (GCS) in unconventional hydrocarbon reservoirs, and the extraction of hot fluid for energy through enhanced geothermal systems. However, these energy solutions can only be achieved through efficient stimulation to develop a complex fracture network and pore structure in the host rocks to extract heat and hydrocarbon, or for CO2 storage. Using Bakken formation well data and rock physics models, this study aimed to identify the post-depositional effect of pore structure on seismic velocity, elastic moduli, and formation fluid; and further predict the best lithofacies interval for well landing, and the implications for fluid (gas, oil, and water) recovery in naturally- and often systematically-fractured geosystems. The KT and DEM models' predictions show distinct formation intervals exhibiting needle-like pores and having higher seismic velocities (Vp and Vs) and elastic moduli (K and µ), relative to other formation intervals that exhibit moldic pores. At the same fluid concentration, the needle-like pores (small aspect ratios) have a higher impact on elastic moduli, Vp, and Vs than on the moldic spherical pores with all other parameters held constant. Vp is affected more than Vs by the properties of the saturating fluid (gas, oil, or water) with Vp being greater in Bakken formation when it is water-saturated than when it is gas-saturated. Vs exhibit the reverse behavior, with Vs greater in the gas-saturated case than in the water-saturated case. Further, analyses suggest that the middle Bakken formation will have a higher susceptibility to fracturing and faulting, and hence will achieve greater fluid (oil and water) recovery. Our findings in this study provide insights that are relevant for fluid production and geo-storage in unconventional reservoirs. Article highlights Integrated well log data and rock physics models. Investigated the effect of changes in pore structure on elastic properties and fluid flow in shale. Increase in porosity causes a reduction in elastic moduli and seismic velocities. Vp is more affected by pore geometry than Vs depending on density and properties of saturating fluid. Lithofacies with needle−like pores are more susceptible to fracturing than lithofacies with intragranular pores.

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Rock Physics Template Application on Carbonate Reservoir

Cited by 3 publications

References 1 publication

Integration of Well Logging and Seismic Data for the Prognosis of Reservoir Properties of Carbonates

Integration of Well Logging and Seismic Data for the Prognosis of Reservoir Properties of Carbonates

Construction of 2D and 3D rock physics templates for quantitative prediction of physical properties of a carbonate reservoir in SW of Iran

Pore morphology effect on elastic and fluid flow properties in Bakken formation using rock physics modeling

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