Spatio-temporal characterisation of the Beekeeper Formation of Australia: facies development, mixing of carbonate and siliciclastic materials, and influencing factors

Petroleum Research, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Language: Английский

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Recent advancements in characterizing permeability and porosity distributions in bioturbated flow media

Earth-Science Reviews, Journal Year: 2022, Volume and Issue: 232, P. 104162 - 104162

Published: Aug. 18, 2022

Language: Английский

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Impact of kaolinite and iron oxide cements on resistivity and quality of low resistivity pay sandstones

Marine and Petroleum Geology, Journal Year: 2023, Volume and Issue: 158, P. 106568 - 106568

Published: Oct. 26, 2023

Language: Английский

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Depositional and diagenetic controls on the reservoir quality of marginal marine sandstones: An example from the Early Devonian Subbat Member, Jauf Formation, northwest Saudi Arabia

Marine and Petroleum Geology, Journal Year: 2024, Volume and Issue: 170, P. 107147 - 107147

Published: Oct. 10, 2024

Language: Английский

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3D Microporosity Characterizations in the Heterogeneous Middle Jurassic Tuwaiq Mountain Formation: Insights into an Unconventional Sweet Spot

ACS Omega, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 16, 2024

Carbonate microporosity can vary significantly across depositional lithofacies and cycles, owing primarily to the high degree of heterogeneity in their pore sizes, throat radius, geometry, connectivity. This is further compounded by complex diagenetic alterations during various stages burial. In addition, presence micropores, which are abundant carbonate rocks, but not visible using conventional techniques, challenging characterize. To address this issue, our study focused on Middle Jurassic Tuwaiq Mountain Formation (TMF) due its importance as an analogue subsurface unconventional reservoirs. Here, we utilized eight samples performed network modeling quantify distribution connectivity from high-resolution microcomputed tomography images different microfacies (MF) TMF both mud- grain-dominated facies. These results were then validated with petrographic, SEM images, porosity–permeability measurements. Our revealed that, high-energy, grain-supported shallow lagoon cycle, micropores dominated interparticle microvug types well-connected, mean sizes 7 4 μm. Conversely, within low-energy mud-dominated deep cycle intraparticle intercrystalline isolated rarely connected, even at microscale (1–4 μm diameter, average 2 μm). result suggests that always related matrix porosity, present submicron scale, goes against common concepts Furthermore, observations indicate primary processes play a major role controlling Formation's microporosity, while only have minor controls. emphasizes characterizing heterogeneous may reduce uncertainty exploring properties reservoirs worldwide.

Language: Английский

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Bioturbation changing porosity, permeability, and fracturability in chalk? Insights from an Upper Cretaceous chalk reservoir (Buda Formation, Texas, USA)

Ichnos/Ichnos : an international journal for plant and animal traces, Journal Year: 2023, Volume and Issue: 31(2-3), P. 176 - 198

Published: May 23, 2023

The continuous rise in hydrocarbon demand, the production decline conventional oilfields, and remarkable improvement extraction methods have allowed industry subsequently, geoscientists, to turn studies on both unconventional mature fields with untapped potential. In such reservoirs, application of advanced drilling, completion, techniques must be preceded by identification permeable stratigraphic intervals that favour commercial exploitation. Accordingly, bioturbated deposits can play a key role providing pathways for enhanced production. Herein, we analyse effects bioturbation porosity permeability Buda Formation, highly bioturbated, tight (low-porosity matrix) Upper Cretaceous chalk reservoir from Texas Gulf Coast Basin, which has been commercially exploited because occurrence natural fractures. Our results show (in addition fractures) burrows (and borings) substantially increased this formation, thus, potentially contributing (or groundwater) storage These biogenic structures might also favoured development fractures stylolites Formation. However, further are required prove hypothesis.

Language: Английский

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Quantitative characterization of 3D pore structures and percolation characteristics in bioturbated reservoir media based on X-ray micro-CT: a case study of the Neogene Sanya Formation in the Qiongdongnan Basin, Northern South China Sea

Ichnos/Ichnos : an international journal for plant and animal traces, Journal Year: 2024, Volume and Issue: 31(2-3), P. 199 - 219

Published: May 24, 2024

Organisms alter the primary texture of sediments, leading to alteration in petrophysical properties mediated by a textural and mineralogical contrast between burrow-fill sediment host, which affects reservoir fluid flow characteristics. In this article, order understand microscopic pore structure state fluids pores bioturbated reservoirs, Ophiomorpha-bearing reservoirs Neogene Sanya Formation Qiongdongnan Basin northern South China Sea were selected research. Micro-CT was applied scan core plugs, 3D model established. The geometric characteristics quantitatively visually characterized modified maximal ball algorithm, connectivity analysis carried out. Numerical simulations percolation analyzed samples performed using digital software (Avizo) multi-physics field simulation (Comsol). results show that: (1) structures reveal that volume, area, equivalent radius, throat radius length have large distribution range; among them, volume has largest range, can vary six orders magnitude, indicating size is uneven strong heterogeneous characteristics; (2) connected very complex, as increases, coordination number also gradually better connectivity. suggested larger space plays key role effective permeability reservoir. This study important implications for analyzing modification effect bioturbation on oil gas enhancing production recovery area.

Language: Английский

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Diagenetic history and porosity evolution of the Middle Permian clastic-carbonate mixed system, Indus Basin, Pakistan: Implications for reservoir development

Energy Geoscience, Journal Year: 2024, Volume and Issue: 5(4), P. 100317 - 100317

Published: May 25, 2024

This study deals with unraveling the diagenesis-induced porosity evolution in a mixed clastic-carbonate sequence of Middle Permian Indus Basin, Pakistan. Multiple data sets including outcrop, petrography, cathodoluminescence, scanning electron microscopy (SEM), mineralogy, and geochemical isotopic compositions were integrated to establish link between diagenesis. The spatial thickness facies variations strata at outcrop scale are inherently controlled by underlying bathymetry basin deepening westward trend. depleted values δ18O target strata, relative standard carbonate, hints diagenetic alteration strata. used this reveal modification four environments, that is, i) early marine diagenesis indicated micritization, pervasive dolomitization isopachous fibrous cements, followed ii) meteoric dissolution, iii) shallow burial processes precipitation blocky cement, compaction skeletal non-skeletal allochems, stylolites, iv) deep environment, characterized pressure solution, micro-fractures. clastic intervals host subangular subrounded quartz grains, floating textures, almost complete absence deleterious clay minerals, consequently resulting preservation primary porosity. carbonate is preserved form intercrystalline intracrystalline secondary evolved through various phases fractures dissolution. solution mediated organic matter carbonates may have experienced both bacterial decomposition thermochemical sulfate reduction, precipitating sulfides within pores. plug porosity/permeability analyses generally suggest high siliciclastic unit, wackestone fabric while lower observed for inner shelf pure facies. However, show very low permeability probably due isolated moldic pores intense micritization. Therefore, provide an opportunity serve as moderate reservoir; however, possess could be considered low-moderate reservoir potential.

Language: Английский

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Architectural characterization of carbonate tidal channels in the Mishrif Formation, H Oilfield, Iraq

Petroleum Science, Journal Year: 2024, Volume and Issue: unknown

Published: July 1, 2024

For a better understanding of the strong heterogeneities Mishrif Formation in H Oilfield southeast Iraq, characterization carbonate architectures has become one key research departments rocks. This study aims to reveal architecture and controlling factors tidal channels MB1-2B sub-layer response delineation that have hydrocarbon potential. Three architectural elements three boundaries were identified by interpreting cores, well-logging, seismic, analytical data. The results show that: (1) characteristics are mainly migrating type downstream zone, side concave bank is usually filled with relatively coarse-grained grainstone; (2) swinging upstream showing high porosity permeability; (3) vertical-accretion mid-regions, indicating instantaneous current reversals geographical position. analysis demonstrates best reservoir quality within located bend channel near inner lagoon open sea, it provides geological models for later exploration development Formation.

Language: Английский

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Bioturbated strata in the Upper Cretaceous Aruma Formation, central Saudi Arabia: An analog for aquifers and hydrocarbon reservoirs with large burrows

Marine and Petroleum Geology, Journal Year: 2023, Volume and Issue: 157, P. 106489 - 106489

Published: Sept. 7, 2023

The upper Cretaceous Aruma Formation in Central Saudi Arabia exhibits Thalassinoides-bearing strata resembling a bioturbated carbonate reservoir with large burrows. These burrows possess distinct stratigraphic characteristics. Certain intervals within the formation feature open or partially filled Thalassinoides, creating three-dimensional permeability pathways, while others contain Thalassinoides low-permeability sediments. This comprehensive study investigates paleoenvironment, ichnological features, bulk influence, and variations of these intervals. Incorporating field observations, laboratory analyses (including petrography, geochemical assessments, petrophysical measurements, computer tomography scanning [CT]), we present division studied interval into three biogenically influenced fluid flow media (BIFM 1–3). BIFM 1 comprises solution-enlarged (average shaft diameter: 5 cm) hosted mud-dominated matrix. 2 consists infills 3 embedded dolomite compacted Thalassinoides. units demonstrate burrow percentages ranging from 10% to 50%, featuring interconnected networks. identified reflect diverse depositional settings, marine restricted lagoon, positions. By highlighting sedimentological controls on properties containing burrows, this research contributes prediction super-permeability zones analogous settings.

Language: Английский

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