The influence of water level changes on sand bodies at river-dominated delta fronts：The Gubei Sag, Bohai Bay Basin

Zhang, Yang; Zheng, Shao-Hui; Li, Ji; Wang, Junwei; Yang, Baoliang; Jiang, Jiguo

doi:10.1016/j.petsci.2021.09.028

Cited by 4 publications

(1 citation statement)

References 23 publications

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“…By establishing a more precise isochronous stratigraphic and sedimentary micro-facies framework, the remaining oil distribution can be analyzed more effectively. [32][33][34][35][36][37][38][39][40][41][42][43][44][45] The identification of the type of stratigraphic structure and superposition pattern controlled by the basement gyre and its position in the advanced gyre in the terrestrial river-lake environment has become a key issue in the study of the remaining oil distribution in terrestrial basins [46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61].…”

Section: Introductionmentioning

confidence: 99%

Channel Evolution under the Control of Base-Level Cycle Change and the Influence on the Sustainable Development of the Remaining Oil—A Case in Jiang Ling Depression, Jiang Han Basin, China

et al. 2022

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The extension of river channels is one of the key factors in determining the remaining oil distribution. Different sedimentary facies and bedding types of oil layers will form specific characteristics of remaining oil distribution after water injection development. Using massive drilling, core, logging, seismic, and production data, on the basis of sequence stratigraphy base-level cycle change, the river records and development history are restored, and the fine connectivity of reservoirs and the configuration relationship of production wells are studied. The following conclusions are drawn: (1) A sequence stratigraphic division scheme is established. In the established sequence framework, the types and characteristics of reservoir sand bodies are analyzed. The 2nd and 6th members of Yu yang formation can be divided into 2 long-term base level cycles, 5 medium-term base level cycles, and 17 short-term base level cycles. The evolution of the second and sixth members of the Yu yang formation shows a pattern of base level rising, falling and rising again; (2) the vertical sedimentary evolution sequence is underwater distributary channel distributary channel meandering channel distributary channel flood plain. The types of channel sand bodies developed from little overlap to more vertical or lateral overlap and then gradually changed to isolated type; (3) according to the structural location and development sequence, different types of reservoirs are identified. Combined with the statistics of the drilled data of Yu yang formation k2y4 in Fu I fault block, it is found that the connectivity rate of oil layer thickness (the ratio of oil layer connectivity thickness to total thickness of sand layer) within the oil-bearing area is 84.4%, and the connectivity rate of the number of layers (8) is 60%. The connectivity condition is relatively good.

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Section: Introductionmentioning

confidence: 99%

Channel Evolution under the Control of Base-Level Cycle Change and the Influence on the Sustainable Development of the Remaining Oil—A Case in Jiang Ling Depression, Jiang Han Basin, China

et al. 2022

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Effects of upstream and downstream boundary conditions on lacustrine shallow-water delta morphologies: A numerical modeling approach

Nota,

Zhang,

Liu

et al. 2024

Marine and Petroleum Geology

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Sedimentary Characteristics and Depositional Model of Lacustrine Gravity Flows: A Case Study of Paleogene Shahejie Formation in the Gubei Sag, Eastern China

Zhang,

Wang

2023

Lithosphere

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The genesis and sedimentary architecture of lacustrine gravity flow deposits include ongoing questions affecting the exploration and development of oil and gas, which require attention and investigation. Based on the core description, logging characteristics, and seismic facies in the third member of Paleogene Shahejie formation from the southern Bohai Bay Basin, this study provides some insights regarding lacustrine gravity flows by analyzing the characteristics, distribution patterns, and sedimentary processes of lacustrine gravity flow deposits. Twenty lithofacies are classified into eight bed types which are caused by cohesive flows, inflated flows, concentrated-density flows, or turbidity currents. The characteristics and distributions of different bed types in five sublacustrine fans with two provenance directions and in a slump olistolith reflect two sedimentary processes influenced by sediment supply, basin structure, and climate, including cohesive flow deposits covered by inflated sandflow deposits transforming into concentrated-density flow deposits into hybrid event beds and finally into turbidity current deposits from inner to outer fan, and cohesive flow deposits transforming into inflated sandflow deposits covered by turbidity current deposits into concentrated-density flow deposits into hybrid event beds finally into turbidity current deposits from proximal to distal lobe. Based on the results, a depositional model of lacustrine gravity flow deposits is established, which highlights the change from superimposed channels to anastomosing channels, the distributions and characteristics of hybrid event beds, and distinctive facies in different elements.

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The influence of water level changes on sand bodies at river-dominated delta fronts：The Gubei Sag, Bohai Bay Basin

Cited by 4 publications

References 23 publications

Channel Evolution under the Control of Base-Level Cycle Change and the Influence on the Sustainable Development of the Remaining Oil—A Case in Jiang Ling Depression, Jiang Han Basin, China

Channel Evolution under the Control of Base-Level Cycle Change and the Influence on the Sustainable Development of the Remaining Oil—A Case in Jiang Ling Depression, Jiang Han Basin, China

Effects of upstream and downstream boundary conditions on lacustrine shallow-water delta morphologies: A numerical modeling approach

Sedimentary Characteristics and Depositional Model of Lacustrine Gravity Flows: A Case Study of Paleogene Shahejie Formation in the Gubei Sag, Eastern China

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