Linking the sedimentary cyclicity with mechanical and physical properties of limestone and marl rocks, Dam Formation, Eastern Saudi Arabia: Implications for hydrocarbon exploration and reservoir development

Aal, Ahmed Abd El; Abdullah, Gamil M.S.; Radwan, Ahmed E.; Ali, Syed Haroon; Shoukat, Noureen

doi:10.1016/j.jseaes.2023.105656

Cited by 4 publications

(3 citation statements)

References 55 publications

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“…In response to the issue of limestone dissolution, numerous scholars have undertaken a series of related studies, and their research results can be summarized in several aspects. (1) Influence of moisture content: The moisture content is negatively correlated with the mechanical properties of rocks, i.e., the higher the moisture content of the rock mass is, the lower its mechanical performance 2 – 8 . (2) Influence of solution properties: The erosion degradation of limestone is mainly controlled by the chemical dissolution of the solution and the mass transfer process of major mineral ions, and the degree of erosion degradation of the rock mass increases with decreasing solution pH 9 – 22 .…”

Section: Introductionmentioning

confidence: 99%

Study on the process of mass transfer and deterioration of limestone under dynamic dissolution of CO2 solution

Dong,

Li,

Shen

et al. 2024

Sci Rep

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The long-term erosion of rock by solution can induce a series of karst problems. Therefore, this study focused on limestone and conducted dynamic dissolution experiments under deionized water and CO2 solution conditions to study the deterioration mechanism of limestone under nonequilibrium conditions. The results showed that the degree of degradation of the mechanical properties of the samples in a CO2 solution was obviously greater. In a deionized water environment, the degradation of the mechanical properties of the sample is mainly controlled by the physical softening action of the solution. In the CO2 solution environment, the degradation process can be divided into two stages. In the early stage of the experiment (10 days to 20 days), the degradation of mechanical properties of the sample is also controlled by the physical softening action of the solution. With increasing soaking time, the main rock-forming minerals of limestone gradually react with the CO2 solution, the degradation of the sample is controlled mainly by the chemical corrosion of the CO2 solution, and its degradation rate is much greater than that of physical softening. The results can be used as a reference for assessing the long-term stability of underground engineering in limestone karst development areas.

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Section: Introductionmentioning

confidence: 99%

Study on the process of mass transfer and deterioration of limestone under dynamic dissolution of CO2 solution

Dong,

Li,

Shen

et al. 2024

Sci Rep

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“…Carbonate rocks are major energy resources worldwide, especially in the Middle East region, and they have wider application in other industries (e.g., Abd El Aal et al, 2023; Abdel‐Fattah et al, 2022; Abdullah et al, 2022; Balaky et al, 2023; Baouche et al, 2022; Boutaleb et al, 2022; Hakimi et al, 2023; Kassem et al, 2022; Radwan et al, 2020; Radwan et al, 2022; Ullah et al, 2023). Carbonate rocks contain the major hydrocarbon reserves in Saudi Arabia.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the influence of the degree of saturation on physical and mechanical properties of carbonate rocks in the Jurassic Tuwaiq Mountain Formation (Saudi Arabia)

et al. 2023

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Understanding the impact of saturation levels on the mechanical and physical properties of limestone and marly limestone deposits is very critical for geotechnical and mechanical studies in the energy and construction industries. This research aims to link the strength characteristics of carbonate rock (limestone and marly limestone) with physical and mechanical properties at saturation levels of 0, 0.25, 50%, 75% and 100%. To complete this work, 100 samples were collected and analysed employing an orderly research facility testing. According to experimental findings, the strength and durability of the limestone and marly limestone declined with rising saturation levels, while the P‐wave velocity Vp showed an upward trend from 0% to 100%. The uniaxial compressive strength (UCS) of the limestones employed in this research significantly decreased (up to 36%) between the dry and saturated stages for limestone samples. While marly limestone, there is a drop (up to 32%) in UCS. The findings of a straightforward regression study show that it is possible to predict the strength properties of rocks directly from various saturation levels. Additionally, a number of various estimate connections were created utilizing independent variables like Vp and saturation level. The experimental outcomes showed that Vp showed an upward tendency with an increasing degree of saturation. The deformability and strength parameters of the samples declined with increasing saturation degrees. The elastic modulus and strength both decrease as clay and water amounts increase. The quality index (QI) number for limestone is 45, which indicates that it has extremely good quality and can be used as a building material at 0% saturation. At 25%, 50%, 75% and 100% saturation, it is evaluated at 43, 40, 33 and 31, respectively. The marly limestone samples have high quality at 0% (QI = 36), but poor quality at 25%, 50%, 75% and 100% saturation (QI = 33, 30, 27 and 23). This research provides a better understanding of the relationship between saturation levels and the mechanical, physical and depositional characteristics of marly limestone and limestone, which might be helpful in industrial studies. Advance examination of distinctive sorts of carbonate rocks can be more supportive of broadening our understanding of this idea.

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“…In carbonate reservoirs, the porosity distribution is to some extent unpredictable, mainly due to diagenesis and, to a lesser degree, heterogeneous lithofacies (Lai et al, 2019; Abdullah et al, 2023; Ullah et al, 2023; Abd El Aal et al, 2023; Balaky et al, 2023; Baouche et al, 2022; Kassem et al, 2022; Hakimi et al, 2023; Radwan et al, 2021 and 2022). Most carbonate rocks are frequently characterized by multiple‐porosity systems that impart petrophysical heterogeneity to reservoir rocks (Mazzullo et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Integrated geological data, 3D post‐stack seismic inversion, depositional modelling and geostatistical modelling towards a better prediction of reservoir property distribution for near‐field exploration: A case study from the eastern Sirt Basin, Libya

Khalifa,

Moncef,

Radwan

2023

Geological Journal

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De‐risking the hydrocarbon potential in near‐field exploration is one of the most important procedures in the exploration of hydrocarbons, and it requires the integration of various data to predict the reservoir characteristics of the prospect area more accurately. In this work, wells and 3D seismic data from the Libyan producing oil fields were utilized to demonstrate how well this technique worked to improve and describe the hydrocarbon potential of the carbonate geobody that corresponds to the Palaeocene Upper Sabil Formation, which was revealed by new seismic data. This study integrates different types of data, including 3D seismic, seismic acoustic impedance, depositional history and geostatistical analysis, to predict the facies, reservoir porosity and permeability distributions and then visualize them in a 3D reservoir model. The 3D seismic data analysis revealed the presence of a clear seismic anomaly geobody (GB) that has never been penetrated by any well. The sedimentological analysis for the well adjacent to the GB indicated a deep‐water depositional environment as turbidites surrounded by deep‐water mud dominated facies. The Upper Palaeocene interval in the study area was subdivided based on the depositional facies and seismic stratigraphy into eight zones that were used to build the reservoir model framework. According to the porosity permeability relationships, the carbonate facies has been classified into five E‐Facies, that is, soft highly argillaceous limestone, hard argillaceous limestone, porous limestone (<20% porosity, and >30% shale volume), medium quality limestone (10–20% porosity, and >30% shale volume) and tight limestone (<10% porosity, and >30% shale volume). The rock physics and inversion feasibility analysis indicated that the acoustic impedance (AI) can be used to predict the porosity but not the lithology or the fluid content. The Bayesian classification has shown excellent results in predicting and modelling the reservoir facies distribution within the study area, utilizing the integration of gross depositional maps (GDEs), wells and seismic data. The reservoir quality of the GB was predicted by using the post‐stack seismic inversion, which indicated a high porosity interval (25%–30%). Moreover, the statistical analysis integrated with the well and seismic data was used to predict the GB permeability. The predicted permeability was reasonably high (40–60 mD). The final E‐facies show an excellent match with the input well data and an excellent match with the blind wells that were used for result quality control (QC) with higher vertical resolution. The developed model can be used as a guide for de‐risking the studied GB hydrocarbon potential in the studied basin, and it can be applied in other similar geological conditions worldwide for exploring underexplored reservoirs and de‐risking their hydrocarbon potential.

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Linking the sedimentary cyclicity with mechanical and physical properties of limestone and marl rocks, Dam Formation, Eastern Saudi Arabia: Implications for hydrocarbon exploration and reservoir development

Cited by 4 publications

References 55 publications

Study on the process of mass transfer and deterioration of limestone under dynamic dissolution of CO2 solution

Study on the process of mass transfer and deterioration of limestone under dynamic dissolution of CO2 solution

Experimental study of the influence of the degree of saturation on physical and mechanical properties of carbonate rocks in the Jurassic Tuwaiq Mountain Formation (Saudi Arabia)

Integrated geological data, 3D post‐stack seismic inversion, depositional modelling and geostatistical modelling towards a better prediction of reservoir property distribution for near‐field exploration: A case study from the eastern Sirt Basin, Libya

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