A qualitative-quantitative approach for studying the impact of facies and diagenesis control on the rudist biostrome of the Sarvak formation, Abadan plain, SW Iran

Sabouhi, Mostafa; Moussavi‐Harami, Reza; Kadkhodaie, Ali; Rezaee, Payman; Jalali, Mahmoud

doi:10.1016/j.petrol.2022.110245

Cited by 15 publications

(2 citation statements)

References 67 publications

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“…Dissolution and neomorphic caused by diagenesis resulted in increasing the quality of the reservoir. Cementation, compaction, and micritization have an adverse effect on reservoir properties (Sabouhi et al 2022).…”

Section: Geological Descriptionmentioning

confidence: 99%

Prediction of Reservoir Compressibility Using Subsurface Cores, Well Logs, and Seismic Data by Neural Network

VALI,

HajiZadeh

2023

Preprint

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In this study, three-dimensional pore volume compressibility of a carbonate reservoir was predicted. The primary data of the model were petrophysical parameters, measured compressibility factor on core samples, conventional well logs, and three-dimensional seismic attributes. Neural network algorithms were employed to propagate the compressibility data along the well axis and to predict the distribution of compressibility within three-dimensional seismic acquisition area. A probabilistic neural network algorithm resulted in a correlation of 85% between the predicted and measured compressibility along the wells-axis. The seismic attributes were extracted to find the best correlation and minimum error between the generated and target attributes. The correlation coefficient of 78% indicates the high accuracy of the model and the optimal choice of neural network algorithms. The results of this study provide insights into the application of seismic data to field-wide prediction of reservoir compressibility.

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Section: Geological Descriptionmentioning

confidence: 99%

Prediction of Reservoir Compressibility Using Subsurface Cores, Well Logs, and Seismic Data by Neural Network

VALI,

HajiZadeh

2023

Preprint

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“…Other controlling parameters include the carbonates' original mineralogical composition, the palaeoclimatic conditions during and after deposition, and changes in the relative sea level, as well as the burial, thermal and tectonic history of the depositional basin (e.g. Hird and Tucker, 1988;Esteban and Taberner, 2003;Dravis and Muir, 2004;Sabouhi et al, 2022). Comparison of the diagenetic history of uplifted and subaerially-exposed carbonate successions and related porosity modifications (i.e.…”

Section: Introductionmentioning

confidence: 99%

Pre‐, Syn‐ and Post‐tectonic Diagenetic Evolution of a Carbonate Reservoir: A Case Study of the Lower Cretaceous Fahliyan Formation in the Dezful Embayment, Zagros Foldbelt, Sw Iran

Keyvani,

Al‐Aasm,

Mansurbeg

et al. 2023

Journal of Petroleum Geology

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Lower Cretaceous carbonates of the Fahliyan Formation form prolific reservoir rocks at oilfields in the Dezful Embayment, central Zagros fold‐thrust belt, SW Iran. The carbonates have undergone significant diagenetic alteration in phases which can in general be linked to the pre‐, syn‐ and post‐tectonic evolution of the fold‐thrust belt. This paper investigates the impact of diagenetic processes on the reservoir quality of the carbonates using integrated petrographic, geochemical and sedimentological analyses of subsurface and outcrop samples of the formation. Diagenetic alterations include:(i) pre‐tectonic eogenesis in the marine and shallow‐burial realm, which resulted in micritization of allochems and cementation by equant and isopachous calcite rims and framboidal pyrite together with limited dolomitization and dissolution of metastable bioclasts. The isotopic compositions of micrite and early calcite cement depart from postulated values of Lower Cretaceous marine carbonates, signifying early stabilization of precursor metastable carbonate minerals and the possible effects of the incursion of meteoric waters and/or increasing burial temperatures;(ii) mesogenesis during the subsequent syn‐tectonic phase, which included Late Cretaceous ophiolite obduction at the northern margin of the Arabian Plate and the later Zagros orogeny in the Miocene‐Pliocene. Diagenetic modifications included the emplacement of hydrocarbons, the development of stylolites and fractures, and the precipitation of saddle dolomite, replacive rhombic dolomite, discrete pyrite, microcrystalline quartz, kaolin and anhydrite. The average stable isotope compositions of saddle dolomite (δ18O: ‐6.9 ‰ ± .9 and δ13C 0.5 ‰ ± 1.6, respectively) also reflects the influence of high temprature basinal fluids;and (iii) “late” (telogenetic, post‐tectonic) uplift‐related modification starting in the Pliocene, when the incursion of meteoric waters resulted in the formation of vugs, the calcitization of dolomite, and cementation by fracture‐filling blocky calcite. The negative δ18O and δ13C stable isotope values (average: ‐5.5 ‰ ± 1.5; and ‐3.6 ‰ ± 5.9, respectively) of late blocky calcite cement suggest the incursion of meteoric water into the system.This study demonstrates that diagenetic processes in carbonates in the Fahliyan Formation, which exerted a significant control on the distribution of secondary porosity, can be related to the tectonic evolution of the central Zagros fold‐thrust belt. Thus, constraining the diagenetic history of carbonate successions within the context of their wider tectonic evolution is important for the prediction of the spatial and temporal distribution of reservoir quality.

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Maximum entropy spectral analysis of gamma ray logs for cyclostratigraphic analysis of the Late Albian- Early Turonian Sarvak Formation in the Anaran exploration block, southwestern Zagros, Iran

Abbasi,

Kodkhodaie,

Mahari

et al. 2023

Earth Sci Inform

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A qualitative-quantitative approach for studying the impact of facies and diagenesis control on the rudist biostrome of the Sarvak formation, Abadan plain, SW Iran

Cited by 15 publications

References 67 publications

Prediction of Reservoir Compressibility Using Subsurface Cores, Well Logs, and Seismic Data by Neural Network

Prediction of Reservoir Compressibility Using Subsurface Cores, Well Logs, and Seismic Data by Neural Network

Pre‐, Syn‐ and Post‐tectonic Diagenetic Evolution of a Carbonate Reservoir: A Case Study of the Lower Cretaceous Fahliyan Formation in the Dezful Embayment, Zagros Foldbelt, Sw Iran

Maximum entropy spectral analysis of gamma ray logs for cyclostratigraphic analysis of the Late Albian- Early Turonian Sarvak Formation in the Anaran exploration block, southwestern Zagros, Iran

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