Depositional environment, seismic stratigraphy, and Sr-isotope geochronology, Bangestan reservoir, Ahwaz oilfield, SW Iran

Khoshnoodkia, Mehdi; Rahmani, Omeid; Adabi, Mohammad Hossein; Hosseini-Barzi, Mahboubeh; Mahdi, Thamer A.

doi:10.1016/j.petrol.2021.109629

Cited by 12 publications

(9 citation statements)

References 37 publications

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“…Furthermore, based on the numerical results, it may be concluded that the drilling fluid's temperature is one of the important factors in the wellbore stability analysis in depleted reservoirs. (Khoshnoodkia et al, 2022;Mirkamali et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

“…4. Albian-Santonian chronostratigraphic correlation of middle Cretaceous sediments in the Zagros Basin and the Arabian Plate for oceanic anoxic events (Hosseini et al, 2023b;Khoshnoodkia et al, 2022;Talaie et al, 2023).…”

Section: Discussionmentioning

confidence: 99%

“…The Ahwaz oilfield, 67 km in length and 6 km in width consists of two oil reservoirs, Asmari and Bangestan, and one gas reservoir, Khami. The Bangestan reservoir, which occurs in the Ahwaz oilfield, consists of the middle Cretaceous limestone Ilam and Sarvak Formations deposited in the Zagros Basin (Khoshnoodkia et al, 2022;Kianoush, 2023;Kianoush et al, 2023d;Kianoush et al, 2022a;Shad et al, 2022;Talaie et al, 2023). Factors influencing reservoir characterizations are sedimentary environments, microfacies, diagenetic processes, and tectonic activities.…”

Section: Geological Settingmentioning

confidence: 99%

“…These results suggest that the facies associations represent a carbonate sequence of the interior shelf, shoal-back, shoallagoon, and tidal flat. Besides, a vertical variation in the sedimentary cycles can be seen in the Bangestan reservoir associated with relative changes in the sea level and two main disconformities of Cenomanian-Turonian and post-Turonian (Hosseini et al, 2023a;Hosseini et al, 2023b;Hosseini et al, 2023c;Khoshnoodkia et al, 2022;Kiaei et al, 2015;Tavakkoli and Amini, 2006). Regarding seismic tectonostratigraphic, the Bangestan reservoir with shallow facies shows continuous subsidence and rising sea level; however, the upper sequences reflect deep-marine facies in the basin.…”

Section: Geological Settingmentioning

confidence: 99%

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Wellbore Stability in a Depleted Reservoir by Finite Element Analysis of Coupled thermo-poro-elastic Units in an Oilfield, SW Iran

Pirhadi,

Kianoush,

Ebrahimabadi

et al. 2023

Preprint

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Maintaining wellbore stability in depleted reservoirs is a critical problem. With production from hydrocarbon reservoirs, the pore pressure of the reservoir is reduced over time, and the reservoir is depleted since field development is one of the main purposes for oil companies. Heavy mud weight in depleted reservoir caused fracture due to reduced fracture gradient, and low mud weight caused blow out in high-pressure zone or well collapse due to shale beds that required high mud weight to prevent collapse. Considering geomechanics and coupled equilibrium equation, continuity equation, Hook’s law, compatibility equation, Darcy’s law, and thermal relation, the Thermo-poro-elastic equation was derived in this research. A finite element method has been developed to implement the fully coupled thermo-poro-elastic non-linear models. The finite element model was validated by comparing it to the available analytical solutions for the thermo-poro-elastic wellbore problems in shale. The non-linear thermal-poro-elasticity finite element model was used to analyze wellbore stability in a depleted reservoir during drilling. The numerical results showed that a decrease drilling fluid’s temperature (cooling) causes to increase in the potential for tensile failure and reduces the potential of shear failure. Due to the depletion reservoir, the potential of tensile failure increased than shear failure, so heating the drilling fluid could cause wellbore stability in the depleted reservoir. Furthermore, based on the numerical results, it may be concluded that the drilling fluid’s temperature is one of the important factors in the wellbore stability analysis in depleted reservoirs.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

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Wellbore Stability in a Depleted Reservoir by Finite Element Analysis of Coupled thermo-poro-elastic Units in an Oilfield, SW Iran

Pirhadi,

Kianoush,

Ebrahimabadi

et al. 2023

Preprint

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“…1. The proposed depositional environment of the Zagros and adjacent basins in the middle Cretaceous (Khoshnoodkia et al, 2022;Mirkamali et al, 2016).…”

Section: Figure Captionsmentioning

confidence: 99%

Determining the petrophysical rock types utilizing the Fuzzy C-means Clustering technique and the concept of hydraulic flow units in the Asmari Formation, SW Iran

Eftekhari,

Memariani,

Maleki

et al. 2023

Preprint

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Rock types are the reservoir's most essential properties and show special facies with a defined range of porosity and permeability. This study used the fuzzy c-means clustering technique to identify rock types in 280 core samples from one of the wells drilled in the Asmari reservoir in the Mansouri field, SW Iran. Four hydraulic flow units were determined for studied data after classifying the flow zone index with histogram analysis, normal probability analysis, and the sum of square error methods. Then the two methods of flow zone index and fuzzy c-means clustering were used to determine the rock types in given wells according to the results obtained from the implementation of these two methods in-depth, and continuity index acts, the fuzzy c-means methods with continuity number 3.12 compared to flow zone index with continuity number 2.77 shows more continuity in depth. The relationship between porosity and permeability improved using hydraulic flow unit techniques significantly. In this study, the correlation coefficient between porosity and permeability improves and increases in each hydraulic flow unit using the flow zone index method. So that in the general case, all samples increased from 0.55 to 0.81 in the first hydraulic flow unit and finally 0.94 in the fourth hydraulic flow unit. The samples were characterized by similar flow properties in a hydraulic flow unit. In comparison, the correlation coefficient is obtained less than the general case in the fuzzy c-means method in all hydraulic flow units.

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A study on source identification of contaminated soil with total petroleum hydrocarbons (aromatic and aliphatic) in the Ahvaz oil field

Kazemi,

Parvaresh,

Ghanatghestani

et al. 2024

Environ Monit Assess

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Depositional environment, seismic stratigraphy, and Sr-isotope geochronology, Bangestan reservoir, Ahwaz oilfield, SW Iran

Cited by 12 publications

References 37 publications

Wellbore Stability in a Depleted Reservoir by Finite Element Analysis of Coupled thermo-poro-elastic Units in an Oilfield, SW Iran

Wellbore Stability in a Depleted Reservoir by Finite Element Analysis of Coupled thermo-poro-elastic Units in an Oilfield, SW Iran

Determining the petrophysical rock types utilizing the Fuzzy C-means Clustering technique and the concept of hydraulic flow units in the Asmari Formation, SW Iran

A study on source identification of contaminated soil with total petroleum hydrocarbons (aromatic and aliphatic) in the Ahvaz oil field

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