Source‐sink System and Sedimentary Model of Progradational Fan Delta Controlled by Restricted Ancient Gully: An Example in the Enping Formation in the Southern Baiyun Sag, Pearl River Mouth Basin, Northern South China Sea

Feng, Congjun; Yao, Xingzong; Yang, Haijun; Li, Daming; Sun, Mengsi

doi:10.1111/1755-6724.14627

Cited by 8 publications

(2 citation statements)

References 27 publications

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“…The relationships among the formation, and evolution of fan deltas, and stratigraphic sequences continue to be a significant subject in geological studies (Feng et al 2021;Xu et al 2023a). Recent advancements in science and technology have led to substantial progress in this area, particularly through the development of various stratigraphic sequence patterns.…”

Section: Introductionmentioning

confidence: 99%

Sedimentary evolution pattern influenced by sequence stratigraphy: a case study of the Nanpu Sag, Bohai Bay Basin, China

Sun,

Lin,

Wang

et al. 2024

Geosci. Lett.

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Identifying and characterizing sedimentary evolution patterns are crucial for assessing the distributions of source and reservoir rocks, which are fundamental to hydrocarbon exploration. This study analyzed the stratigraphic sequence, lithological characteristics, sedimentary lithofacies, individual well sedimentary sequences, and seismic reflection properties. The analysis revealed six fourth-order sequences, including progradational and regressive sequences, indicative of water level changes. The sediment sources for the second and third sub-members of the Eocene Shahejie Formation's third member (Es32+3) in the Nanpu Sag were identified as the Baigezhuang and Xinanzhuang Uplifts. Predominantly, the sandstones are lithic arkose and feldspathic litharenite, both of which exhibit low compositional and structural maturity. Notably, 22 lithofacies and 8 lithofacies associations suggest fan delta processes. This study identified three fundamental seismic reflection package reflection types. These lithofacies associations, sedimentary sequences, and seismic reflections serve as critical indicators for determining sedimentary environments. The results from the sedimentary facies analysis indicate that the Es32+3 Formation developed fan delta deposits, controlled by the sequence of the sedimentary evolution pattern. The potential of these fan delta sediments to form oil and gas reservoirs is significant. Therefore, precise characterization of the sedimentary evolution pattern is essential for a comprehensive understanding of basin dynamics and hydrocarbon potential.

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Section: Introductionmentioning

confidence: 99%

Sedimentary evolution pattern influenced by sequence stratigraphy: a case study of the Nanpu Sag, Bohai Bay Basin, China

Sun,

Lin,

Wang

et al. 2024

Geosci. Lett.

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“…It is not conducive to large-scale exploration and development of unconventional oil and gas reservoirs in China. Thus, research on the influencing factors of microscopic pore structures on the occurrence of tight oil in tight sandstone reservoirs is of major practical importance for the development of tight oil reservoirs [13][14][15][16][17][18][19][20][21]. Scholars have used a variety of research approaches in the past decade, and several studies have been conducted on the occurrence condition of tight oil.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Influence of Micro-Pore Structure on Oil Occurrence Using Nano-CT Scanning and Nuclear Magnetic Resonance Technology: An Example from Chang 8 Tight Sandstone Reservoir, Jiyuan, Ordos Basin

et al. 2023

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The micro-pore structure of a tight sandstone reservoir remarkably impacts the occurrence characteristics of the tight oil. The micro-pore structure of the Jiyuan Chang 8 tight sandstone reservoir in the Ordos Basin was examined in this research using a core physical property test, an environmental scanning electron microscope, thin section identification, and high-pressure mercury intrusion. Using nano-CT scanning and nuclear magnetic resonance technologies, representative core samples were chosen for studies evaluating the tight oil occurrence statically and dynamically. The micro-pore structure effect of a tight sandstone reservoir on the occurrence of tight oil was investigated, and the occurrence of tight oil in the reservoir forming process was discussed. It was significant to the study of tight oil in the reservoir forming process in Ordos Basin. Findings indicated that the Chang 8 reservoir in Jiyuan, Ordos Basin has poor physical properties and exhibits a high degree of heterogeneity. In addition, the oil charging simulation experiment (oil charging) can be separated into the following three stages: fast growth, gradual growth, and stability. In the process of crude oil charging, oil always preferentially entered into medium pores and large pores. These pores were the primary areas of tight oil distribution. Furthermore, the occurrence of tight oil was affected by pore type, pore structure parameters, throat parameters, and combination mode of pore and throat. First, substantially large and medium pores lead to effective pore connectivity and generate a considerable amount of tight oil. The occurrence morphology includes oil film, cluster, porous, and isolated. Second, the greater the degree of intergranular pore growth and soluble feldspar pore development, the thicker the throat, the more developed the effective throat, and the greater the quantity of tight oil. Finally, oil saturation was negatively correlated with median pressure and displacement pressure and positively correlated with sorting factors, median radius, maximum pore throat radius, and efficiency of inverted mercury.

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Genesis, evolution and reservoir identification of a Neogene submarine channel in the southwestern Qiongdongnan Basin, South China Sea

Chen

Jiang

et al. 2023

Acta Oceanol. Sin.

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Source‐sink System and Sedimentary Model of Progradational Fan Delta Controlled by Restricted Ancient Gully: An Example in the Enping Formation in the Southern Baiyun Sag, Pearl River Mouth Basin, Northern South China Sea

Abstract: Since the 1970s, deep-water reservoirs have become the most active field for hydrocarbon research and exploration in continental marginal sedimentary basins (

Cited by 8 publications

References 27 publications

Sedimentary evolution pattern influenced by sequence stratigraphy: a case study of the Nanpu Sag, Bohai Bay Basin, China

Sedimentary evolution pattern influenced by sequence stratigraphy: a case study of the Nanpu Sag, Bohai Bay Basin, China

Analysis of the Influence of Micro-Pore Structure on Oil Occurrence Using Nano-CT Scanning and Nuclear Magnetic Resonance Technology: An Example from Chang 8 Tight Sandstone Reservoir, Jiyuan, Ordos Basin

Genesis, evolution and reservoir identification of a Neogene submarine channel in the southwestern Qiongdongnan Basin, South China Sea

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