How a mud-dominated ramp changed to a carbonate–clastic oil reservoir: Sea-level fluctuations in cretaceous of the central Persian Gulf

Naderi-Khujin, Mehrangiz; Tavakoli, Vahid; Seyrafian, Ali; Vaziri‐Moghaddam, Hossein

doi:10.1016/j.marpetgeo.2020.104301

Cited by 15 publications

(2 citation statements)

References 39 publications

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“…In the Zagros, three unconformities have been identified in middle Cretaceous deposits [40,53,57,58]. The lower unconformity (Mid-Cenomanian) has been observed at the base of this interval in the southern part of the Fars area and Bandar Abbas.…”

Section: Cenomanian Palaeoheightmentioning

confidence: 97%

“…So far, many studies have been carried out in the Dezful Embayment, Izeh, Fars, and the Persian Gulf area (Figure 1). These studies have shown a simple ramp or shelf profile for Sarvak depositional environment [40][41][42][43]. In the Lurestan Zone, the Late Albian-mid-Turonian, Sarvak carbonate factories were dominated by deeper platform environments and some special climatic conditions that led to different facies characteristics compared with other parts of the Zagros area [26] (Figures 1 and 2).…”

Section: Geological Settingmentioning

confidence: 99%

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Evidence for Isolated Platform Development in the Cenomanian on the Passive Margin of Neotethys, Southwest Iran

2023

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In the Cenomanian, the southern passive margin of the Neotethys Ocean was dominated by a giant carbonate factory. This succession is known as Sarvak Formation, a significant reservoir in Iran. This study focuses on a detailed analysis of facies variations and paleoenvironmental reconstruction, including the interpretation of the platform types, during this time interval. Based on field observations and petrographical studies, 12 facies have been recognized and ascribed to six facies belts on a carbonate ramp. Sub-environments include the outer ramp and basin (distal open marine), talus and channel (mid-ramp) and lagoon and shoal (inner-ramp). The frequency of the facies and isochore maps indicate the paleoenvironmental conditions and their spatial variations in the study area. Based on all data and analyses, the suggested conceptual model for the Sarvak Formation in the Lurestan Zone is an isolated platform surrounded by two ramps. The upwind and downwind parts of these ramps were located in the central and northern sub-zones of the Lurestan Zone. This model can be used as a template for isolated platforms worldwide.

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Section: Cenomanian Palaeoheightmentioning

confidence: 97%

Section: Geological Settingmentioning

confidence: 99%

Evidence for Isolated Platform Development in the Cenomanian on the Passive Margin of Neotethys, Southwest Iran

2023

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Experimental investigation and prediction of saturation exponent in carbonate rocks: the significance of rock-fluid properties

Saadat,

Rahimpour-Bonab,

Tavakoli

et al. 2023

J Petrol Explor Prod Technol

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Hydrocarbon reserves are commonly estimated from electrical logs based on the Archie’s law. Therefore, understanding the concepts and precise determination of Archie’s parameters play an essential role in reservoir studies. The electrical properties of carbonates are affected by both microstructures and wetting characteristics of these heterogeneous rocks. Understanding of these effects and prediction of Archie’s parameters are significant theoretical and experimental challenges. In this paper, these effects were analyzed separately using rocks with various lithologies including limestone, dolomitic limestone and dolostones. Samples with different sedimentary textures (grainstones and packstones), porosities and pore types were also considered under different laboratory conditions. For microstructure effects analysis, 16 heterogeneous carbonate samples having a wide range of microstructures were selected. To decrease wetting effect, the washed samples were tested in air–brine injection system at ambient conditions to measure saturation exponent. Subsequently, in order to investigate the influence of the wetting characteristics on this exponent, 25 homogeneous limestone samples were employed for water–oil injection under reservoir conditions. The porous plate was used as a standard technique to determine the saturation exponent as an electrical index. The results showed that pore connectivity and wettability are the main factors affecting the saturation exponent. Heterogeneity, including the presence of large pores and bimodal texture, is another effective factor that complicates the relationship between saturation exponent and wettability. Furthermore, results indicate variation of the saturation exponent with fluid saturation. Finally, equations were obtained to interpret and calculate the saturation exponent using capillary pressure data by mercury injection method. The derived equations clearly demonstrate the significant impact of the studied parameters on the saturation exponent in carbonate rocks.

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Biogenic methane in coastal unconsolidated sediment systems: A review

Duan

Yin

Tsona

et al. 2023

Environmental Research

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How a mud-dominated ramp changed to a carbonate–clastic oil reservoir: Sea-level fluctuations in cretaceous of the central Persian Gulf

Cited by 15 publications

References 39 publications

Evidence for Isolated Platform Development in the Cenomanian on the Passive Margin of Neotethys, Southwest Iran

Evidence for Isolated Platform Development in the Cenomanian on the Passive Margin of Neotethys, Southwest Iran

Experimental investigation and prediction of saturation exponent in carbonate rocks: the significance of rock-fluid properties

Biogenic methane in coastal unconsolidated sediment systems: A review

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