Sedimentary geology and biostratigraphy of the Mianwali Formation, Kala Chitta Range, Northern Pakistan

Qureshi, Kaleem Akhtar; Fatmi, Ali Nasir; Sheikh, Riaz A.; Butt, Abida

doi:10.3126/jngs.v19i0.32093

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the western Himalayan Basin (HB), the Lesser Himalayas of Pakistan are bounded by the Hissartang Fault in the north and the Indus River in the west, constituting the southernmost extension of the Himalayas [34]. The sedimentary succession in the region, from Triassic to Miocene-Pliocene, is tightly folded and cut by numerous thrust faults [35]. The Jurassic sedimentation consists of the Datta Formation, Shinawari Formation, and Samana Suk Formation (Figure 2).…”

Section: Geological Settingmentioning

confidence: 99%

Diagenetic Evolution of Upper Cretaceous Kawagarh Carbonates from Attock Hazara Fold and Thrust Belt, Pakistan

Rehman,

Munawar,

Shah

et al. 2023

Minerals

View full text Add to dashboard Cite

A recent hydrocarbons discovery in 2021 in the Kawagarh Formation has brought attention to the significance of sedimentology and specifically diagenesis for understanding and characterizing the reservoir properties. The diagenetic history and multiscale processes that contributed to diagenesis were vaguely known. This study aimed to reconstruct various diagenetic phases, paragenetic sequences, and the interrelationship of these phases in the Kawagarh Formation. The diagenetic processes were identified and characterized through an integrated methodology utilizing the outcrop, petrographic, and geochemical analyses. Early calcite cementation was found to occur in the early stages of marine burial diagenesis involving pore fluid originating from the dissolution of aragonite in interlayer marl/mudstone beds and reprecipitating as microspar in adjacent limestone beds. The absence of mechanical compaction in wackstone and mudstone facies and the presence of late compaction in lithified packstones clearly imply that early calcite cementation occurred prior to compaction. Dolomitization with stylolites coupled with significant negative oxygen (δ18O) isotope values implies a fault-related hydrothermal dolomitization model. Uplift introduced the fractures and low Mg fresh fluids to the system which caused calcitisation in shallow burial settings. The depleted δ13C and negative δ18O values indicate the mixing of surface-derived waters with hot burial fluids during the calcitization. This study offers valuable insights into several aspects related to the formation and the basin itself, including burial depths, fluid influx, and geochemical gradients. It also sheds light on the evolution of reservoir properties such as porosity and permeability in dolomitization fronts. Such insights can be used to gain a deeper understanding about the burial history, basin evaluation, and reservoir characterization for hydrocarbon exploration.

show abstract

Section: Geological Settingmentioning

confidence: 99%

Diagenetic Evolution of Upper Cretaceous Kawagarh Carbonates from Attock Hazara Fold and Thrust Belt, Pakistan

Rehman,

Munawar,

Shah

et al. 2023

Minerals

View full text Add to dashboard Cite

show abstract

“…The Samana Suk Formation was studied in detail with regard to its sedimentology, paleontology and stratigraphy (Wadood et al, 2021a, b). The depositional environment for the rock unit was established in the Hazara area (Masood, 1989;Sheikh et al, 2001;Qureshi et al, 2008;Hussain et al, 2013). The depositional, diagenetic and sequence stratigraphic constraints on the reservoir quality of the unit in the Kala Chitta and western Salt ranges were documented in detail (Wadood et al, 2021a(Wadood et al, , b, 2021c.…”

Section: Introductionmentioning

confidence: 99%

Facies Analysis, Sequence Stratigraphy and Diagenetic Studies of the Jurassic Carbonates of the Kohat Basin, Northwest Pakistan: Reservoir Implications

Khan

Naseem

Khan

et al. 2022

Acta Geologica Sinica (Eng)

View full text Add to dashboard Cite

The present study deals with the depositional facies, diagenetic processes and sequence stratigraphy of the shallow marine carbonates of the Samana Suk Formation, Kohat Basin, in order to elucidate its reservoir quality. The Samana Suk Formation consists of thin to thick-bedded, oolitic, bioclastic, dolomitic and fractured limestone. Based on the integration of outcrop, petrographic and biofacies analyses, the unit is thought to have been deposited on a gentle homoclinal ramp in peritidal, lagoonal and carbonate shoal settings. Frequent variations in microfacies based sea-level curve have revealed seven Transgressive Systems Tracts (TSTs) and six Regressive Systems Tracts (RSTs). The unit has undergone various stages of diagenetic processes, including mechanical and chemical compaction, cementation, micritization, dissolution and dolomitization. The petrographic analyses show the evolution of porosity in various depositional and diagenetic phases. The fenestral porosity was mainly developed in peritidal carbonates during deposition, while the burial dissolution and diagenetic dolomitization have greatly enhanced the reservoir potential of the rock unit, as is further confirmed by the plug porosity and permeability analyses. The porosities and permeabilities were higher in shoal facies deposited in TSTs, as compared to lagoonal and peritidal facies, except for the dolomite in mudstone, deposited during RSTs. Hence good, moderate and poor reservoir potential is suggested for shoal, lagoonal and peritidal facies, respectively.

show abstract

“…Clastic deposits of the Cretaceous Pab Formation have been considered as important hydrocarbon reservoirs in south-west Pakistan (Sultan & Gipson, 1995;Beswetherick & Bokhari, 2000;Hedley et al, 2001). In Pakistan a lot of work has been carried out in the field of sedimentology and stratigraphy however petrographic studies focusing on reservoir properties in different basins are not enough, and the Middle Indus Basin is not an exception (Qureshi et al, 1996). Pab Formation in different geographic locations has been focused by different authors on the regional stratigraphic architecture, sedimentology, and interpretation of depositional systems (Eschard et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Petrofacies investigations of the Cretaceous Pab Formation Rakhi Gorge Eastern Sulaiman Range Pakistan - Implication for reservoir potential

Mehmood¹,

Ghazi²,

Naseem³

et al. 2021

BGSM

View full text Add to dashboard Cite

Petrologic investigations of the sixty representative thin sections from the Pab Formation within Rakhi Gorge section Eastern Sulaiman Range Pakistan have been used to characterize different diagenetic patterns, identification of primary composition and reservoir characters. Sublithic, lithic and quartzose sandstones have been the principal constituents of the formation. The processes responsible for the late-stage alteration and diagenetic processes identified during the petrographic study include compaction of lithic fragments and mud clasts, formation of quartz overgrowth structures, feldspar replacement and alteration, cementation, and replacement of grains by clay minerals other ferrous elements and diagenetic minerals. The study shows that the initial porosity has been primary intergranular, but the secondary porosity has been originated in the rocks as a result of the alteration of the primary and secondary constituents, as well as fracturing. These facies characters replicate the reservoir quality including, good, medium, low-quality, and non-reservoir. Samples displaying average total porosity greater than 10 % have been declared as good quality. While rocks samples having 7 % or greater porosity are grouped as a medium reservoir. Those samples consisting of porosity values between 1 and 4% are considered as a low quality reservoir while those samples having porosity ranges low than 1% have been called non-reservoir. Based on the investigated parameters the studied samples from the Pab Formation displayed the characters of a medium reservoir that may hold significant hydrocarbon. This different quality including good and low quality zonation can be attributed to the facies and diagenetic change in the formation.

show abstract

Sedimentary geology and biostratigraphy of the Mianwali Formation, Kala Chitta Range, Northern Pakistan

Cited by 3 publications

References 0 publications

Diagenetic Evolution of Upper Cretaceous Kawagarh Carbonates from Attock Hazara Fold and Thrust Belt, Pakistan

Diagenetic Evolution of Upper Cretaceous Kawagarh Carbonates from Attock Hazara Fold and Thrust Belt, Pakistan

Facies Analysis, Sequence Stratigraphy and Diagenetic Studies of the Jurassic Carbonates of the Kohat Basin, Northwest Pakistan: Reservoir Implications

Petrofacies investigations of the Cretaceous Pab Formation Rakhi Gorge Eastern Sulaiman Range Pakistan - Implication for reservoir potential

Contact Info

Product

Resources

About