3D geo-cellular static virtual outcrop model and its implications for reservoir petro-physical characteristics and heterogeneities

Usman, Muhammad; Siddiqui, Numair Ahmed; Zhang, Shiqi; Mathew, Manoj Joseph; Zhang, Yaxuan; Jamil, Muhammad; Li, Xueliang; Ahmed, Nisar

doi:10.1016/j.petsci.2021.09.021

Cited by 12 publications

(4 citation statements)

References 72 publications

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“…The identification of inner structures of the point bar and braided bar was based on the modern deposit theory and outcrop observation [39,64]. We performed reservoir architecture prediction with dense well pattern data.…”

Section: Single-channel Division and Internal Architecturementioning

confidence: 99%

Remaining Oil Distribution Law and Development Potential Analysis after Polymer Flooding Based on Reservoir Architecture in Daqing Oilfield, China

Bai

Guo

et al. 2023

Polymers

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Polymer flooding has drawn more and more attention in the world for its high incremental oil recovery factor and relative low costs compared with water flooding and other chemically enhanced oil recovery techniques. However, for many oilfields, such as Daqing Oilfield, China, that have already been flooded with polymers, how to further improve recovery remains a big problem. Traditional intralayer, interlayer and plane heterogeneity studies cannot accurately characterize the remaining oil distribution after polymer flooding. To solve this problem, we established a method to quantitatively describe the reservoir’s architecture. Then, the architecture elements were dissected hierarchically and the interface of each architecture level in Daqing Oilfield was identified. The distribution pattern and development potential of the remaining oil after polymer flooding under the influence of reservoir architecture was analyzed. The results show that, regarding the sedimentary process from north to south in Daqing Oilfield, the channel becomes narrower, the thickness decreases, the point bar’s width increases and the thickness of the meandering river decreases. The braided bar scale becomes larger and the thickness becomes smaller in the braided river. According to the reservoir’s architecture, the remaining oil was divided into four categories of plane remaining oil (abandoned channel occlusion type, interfluvial sand body occlusion type, inter-well retention type and well pattern uncontrollable type) and three types of vertical remaining oil (in-layer interlayer occlusion type, rhythm type and gravity type). About 40% of the original oil in place (OOIP) of Daqing Oilfield has not yet been produced, which indicates that there is great potential for development. This study is important for improving oil recovery in polymer-flooded reservoirs.

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Section: Single-channel Division and Internal Architecturementioning

confidence: 99%

Remaining Oil Distribution Law and Development Potential Analysis after Polymer Flooding Based on Reservoir Architecture in Daqing Oilfield, China

Bai

Guo

et al. 2023

Polymers

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“…The generation of large amounts of sediments from various local sources and their deposition in the deep‐marine environments is believed to be associated with the complex geology of Borneo in the Tertiary period (Ahmed, Siddiqui, Rahman, et al, 2021; Ahmed, Siddiqui, Ramasamy, et al, 2021; Hall et al, 2008; Ogawa & Back, 2022; Siddiqui et al, 2017; Usman, Zhang, Siddiqui, & Jamaluddin., 2020). Borneo is associated with tectonic subduction coupled with obduction of ophiolites and closure of palaeo‐basins (Hall, 2013; Mathew et al, 2014; Ramkumar et al, 2021; Siddiqui et al, 2019; Usman et al, 2021; Usman, Siddiqui, Mathew, et al, 2020). The northern part of Borneo is comprised of the Sabah Basin (Figure 1a), which was filled by the Late Cretaceous to Tertiary sediments (Jamil, Siddiqui, Ahmed, et al, 2021; Siddiqui et al, 2020).…”

Section: Geological Backgroundmentioning

confidence: 99%

Facies analysis and distribution of Late Palaeogene deep‐water massive sandstones in submarine‐fan lobes, NW Borneo

et al. 2022

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Deep-water massive sandstones (DWMS) are characterized by large volumes of sand accumulations which are considered as potential reservoir intervals in deep-marine environments. Lithological variations and bed thickness statistics are used to interpret the distribution of massive sandstones in a deep-marine fan-lobe system. These massive sandstones are interpreted based on lithological heterogeneities and detailed facies analysis in seventeen exposed sections of the Late Palaeogene deposits in Sabah, NW Borneo. Sedimentary logs containing details of lithology textures and structures were used to recognize nine sedimentary facies of DWMS. These lithofacies were then grouped into three sedimentary facies associations: (1) massive facies association with basal part of turbiditic Bouma sequence, (2) massive facies association having softsediment deformation structures, and (3) massive facies association with erosional features. The facies analysis portrays inner to middle submarine fan deposition and was later applied to reconstruct the distribution of a channel-lobe complex. Individual sandstone bed thicknesses vary from 1 m to more than 8 m and the number of massive sandstones in submarine lobes range from less than 10% to more than 50%. The thicknesses of massive sandstones in channels are more than 8 m, whereas distal lobes have thicknesses from 1-2 m only. These sandstones are concentrated in channels, proximal and medial lobe settings that can also be verified from calculating the average of all maximum thickness of massive sand intervals that is, 8.91 m. The lithological heterogeneities and the processes associated with the deposition of these massive sandstones are vital for potential hydrocarbon reservoirs in the deep-marine environments around the globe.bed thickness statistics, channel-lobe complex, Crocker submarine fan, deep-water massive sandstones, facies analysis and facies association, NW Borneo, West Sabah Basin | INTRODUCTIONThe term 'deep-water massive sandstones' (DWMS) is used to describe the massive sandstones present in deep-marine environments (Johansson et al., 1998;Stevenson & Peakall, 2010;Stow & Johansson, 2000). The study of DWMS became the focus of emerging research over the last two decades and the concept is readily applicable to several deep-marine sandstone deposits across the globe including

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“…Borneo exhibits complex geological history, particularly during the Tertiary Period when thousands of meters-thick deep-marine sedimentary successions were deposited in an active tectonic regime [51][52][53][54][55][56]. Active tectonic subduction in Borneo resulted in the closure of paleo-basins and development of ophiolite rocks [57,58].…”

Section: Geological Settingsmentioning

confidence: 99%

Facies Analysis and Sedimentary Architecture of Hybrid Event Beds in Submarine Lobes: Insights from the Crocker Fan, NW Borneo, Malaysia

Jamil

Siddiqui

Ahmed

et al. 2021

JMSE

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Hybrid event beds represent the combined effect of multiple geological processes, which result in complex depositional geometries and distinct facies distribution in marine environments. Previous work on hybrid event beds highlights the classification, origin, and types of hybrid facies. However, in the present study, we discuss the development of hybrid event beds in submarine lobes with an emphasis on the analysis of proximal to distal, frontal to lateral relationships and evolution during lobe progradation. Detailed geological fieldwork was carried out in the classical deep-marine Late Paleogene Crocker Fan to understand the relationship between the character of hybrid bed facies and lobe architecture. The results indicate that hybrid facies of massive or structureless sandstone with mud clasts, clean to muddy sand, and chaotic muddy sand with oversized sand patch alternations (H1–H3) are well developed in proximal to medial lobes, while distal lobes mainly contain parallel to cross-laminated clean to muddy hybrid facies (H3–H5). Furthermore, lateral lobes have less vertical thickness of hybrid beds than frontal lobes. The development of hybrid beds takes place in the lower part of the thickening upward sequence of lobe progradation, while lobe retrogradation contains hybrid facies intervals in the upper part of stratigraphy. Hence, the development of hybrid beds in submarine lobe systems has a significant impact on the characterization of heterogeneities in deep-marine petroleum reservoirs at sub-seismic levels.

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3D geo-cellular static virtual outcrop model and its implications for reservoir petro-physical characteristics and heterogeneities

Cited by 12 publications

References 72 publications

Remaining Oil Distribution Law and Development Potential Analysis after Polymer Flooding Based on Reservoir Architecture in Daqing Oilfield, China

Remaining Oil Distribution Law and Development Potential Analysis after Polymer Flooding Based on Reservoir Architecture in Daqing Oilfield, China

Facies analysis and distribution of Late Palaeogene deep‐water massive sandstones in submarine‐fan lobes, NW Borneo

Facies Analysis and Sedimentary Architecture of Hybrid Event Beds in Submarine Lobes: Insights from the Crocker Fan, NW Borneo, Malaysia

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