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<p>The shoal-water delta represents a crucial depositional system in both continental lacustrine and shallow marine settings, characterized by unique sedimentary processes, architectural styles, and significant hydrocarbon potentials. In this study, it provides a comprehensive review of conceptual evolution, classification scheme, sedimentary process simulation, and depositional dynamics of shoal-water deltas, with an emphasis on integrating internal and external controls. Historically, the definition of shoal-water deltas has evolved from a purely water-depth-based descriptor to a more holistic system that incorporates tectonic subsidence, hydrodynamic energy, and sediment supply. In terms of classification, traditional single-dimensional schemes have been superseded by multidimensional systems integrating basement subsidence rate, hydrodynamic regime, and depositional position. A new integrative classification is proposed, distinguishing between continental lacustrine shoal-water deltas (including braided river, meandering river, and fan delta types) and marine coastal shoal-water deltas (including river-dominated, tide-dominated, wave-dominated, and mixed-energy types). Sedimentary processes are governed by the coupling of external drivers-such as tectonic subsidence, climate, and lake-level fluctuations-with internal autogenic dynamics including distributary channel avulsion, mouth bar evolution, and sediment redistribution. The summary further synthesizes three complementary methodological approaches: modern analogue studies, physical flume experiments, and numerical simulations, each contributing to a process-based understanding of deltaic evolution. From a petroleum geology perspective, shoal-water deltas offer favorable source-reservoir-seal configurations, yet their strong heterogeneity poses challenges for “sweet spot” prediction and reservoir characterization. This study underscores the necessity of integrating tectonic, hydrodynamic, and architectural perspectives to advance both theoretical sedimentology and practical hydrocarbon exploration in shoal-water delta systems..</p>

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The advances and implications on shoal-water deltaic sedimentology

  • 期刊论文

  • 发表日期：

    2026年6月17日

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  • Xin Li,
  • Shiqiang Xia,
  • Nadeem Ahmad,
  • Dongqing Ye,
  • Wei Wu,
  • Jimei Deng,
  • Hong Li

摘要

The shoal-water delta represents a crucial depositional system in both continental lacustrine and shallow marine settings, characterized by unique sedimentary processes, architectural styles, and significant hydrocarbon potentials. In this study, it provides a comprehensive review of conceptual evolution, classification scheme, sedimentary process simulation, and depositional dynamics of shoal-water deltas, with an emphasis on integrating internal and external controls. Historically, the definition of shoal-water deltas has evolved from a purely water-depth-based descriptor to a more holistic system that incorporates tectonic subsidence, hydrodynamic energy, and sediment supply. In terms of classification, traditional single-dimensional schemes have been superseded by multidimensional systems integrating basement subsidence rate, hydrodynamic regime, and depositional position. A new integrative classification is proposed, distinguishing between continental lacustrine shoal-water deltas (including braided river, meandering river, and fan delta types) and marine coastal shoal-water deltas (including river-dominated, tide-dominated, wave-dominated, and mixed-energy types). Sedimentary processes are governed by the coupling of external drivers-such as tectonic subsidence, climate, and lake-level fluctuations-with internal autogenic dynamics including distributary channel avulsion, mouth bar evolution, and sediment redistribution. The summary further synthesizes three complementary methodological approaches: modern analogue studies, physical flume experiments, and numerical simulations, each contributing to a process-based understanding of deltaic evolution. From a petroleum geology perspective, shoal-water deltas offer favorable source-reservoir-seal configurations, yet their strong heterogeneity poses challenges for “sweet spot” prediction and reservoir characterization. This study underscores the necessity of integrating tectonic, hydrodynamic, and architectural perspectives to advance both theoretical sedimentology and practical hydrocarbon exploration in shoal-water delta systems..