| 河流-潮汐耦合控制下河口湾坝体沉积动力学数值模拟 |
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| 引用本文： | 刘雪萍,卢双舫,唐明明,孙东权,唐佳凡,张克鑫,何涛华,齐宁,卢明月.河流-潮汐耦合控制下河口湾坝体沉积动力学数值模拟[J].地球科学,2021,46(8):2944-2957. |
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| 作者姓名： | 刘雪萍 卢双舫 唐明明 孙东权 唐佳凡 张克鑫 何涛华 齐宁 卢明月 |
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| 作者单位： | 1.中国石油大学深层油气重点实验室, 山东青岛 266580 |
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| 基金项目： | 国家自然科学基金项目41972250山东省自然科学基金项目ZR2019MD006 |
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| 摘 要： | 潮控河口湾坝体复杂的沉积特征及内部结构尚不清楚.通过建立理想化的潮控河口湾模型，采用沉积动力学数值模拟方法，开展不同流量与潮汐能量条件下潮控河口湾坝体及内部夹层的沉积定量化模拟.结果表明，在理想情况下，大潮汐能量、中等流量条件下潮控河口湾坝体大规模发育.在潮汐能量因素分析中，潮控河口湾坝体长宽比为2~15，夹层长度集中在8 km，夹层厚度为0.1~0.2 m；在流量因素分析中，潮控河口湾坝体长宽比为1.5~9.0，夹层长度为1~2 km，夹层厚度为0.1~0.2 m.表明河流和潮汐共同作用控制着潮控河口湾坝体与夹层的形成与分布，但是潮汐作用更显著.基于沉积动力学对潮控河口湾沉积过程开展了数值模拟研究，得到了井震数据的验证，为潮控河口湾体系的沉积演化提供了新思路，从而指导潮控河口湾含油储层的勘探和开发.
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| 关 键 词： | 河口湾 潮汐 沉积动力学 潮汐坝体 夹层 数值模拟 地质勘探 |
| 收稿时间： | 2020-08-01 |
Numerical Simulation of Sedimentary Dynamics to Estuarine Bar under the Coupled Fluvial-Tidal Control |
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| Liu Xueping,Lu Shuangfang,Tang Mingming,Sun Dongquan,Tang Jiafan,Zhang Kexin,He Taohua,Qi Ning,Lu Mingyue.Numerical Simulation of Sedimentary Dynamics to Estuarine Bar under the Coupled Fluvial-Tidal Control[J].Earth Science-Journal of China University of Geosciences,2021,46(8):2944-2957. |
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| Authors: | Liu Xueping Lu Shuangfang Tang Mingming Sun Dongquan Tang Jiafan Zhang Kexin He Taohua Qi Ning Lu Mingyue |
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| Abstract: | The complex sedimentary characteristics and internal structure of the tidal-controlled estuary dam are still unclear. By means of establishment of an ideal tidal-controlled estuary model, using sedimentary dynamics numerical simulation method, quantitative simulation of sedimentation of tidal-controlled estuary dam and internal interlayer was carried out under different flow and tidal energy conditions. The results show that under ideal conditions, large tidal range and medium flow are conducive to large-scale development of tidal-controlled estuary bars. In the analysis of tidal energy factors, the length-to-width ratio of the tidal-controlled estuary dam is 2-15, the length of the interlayer is concentrated at 8 km, and the thickness of the interlayer is 0.1-0.2 m. In the analysis of flow factors, the length-to-width ratio of the tidal-controlled estuary dam body is 1.5-9.0, the interlayer length is 1-2 km, and the interlayer thickness is 0.1-0.2 m. Simulation results show that the coupled action of the river and tide control the formation and distribution of the bar, but the effect of the tide is more remarkable. Numerical simulation of the sedimentary process of tidal-controlled estuaries based on sedimentary dynamics has been verified by well seismic data, which will provide new ideas for the sedimentary evolution of tidal-controlled estuaries and will guide the exploration and development of oil-bearing reservoirs in the tidal-controlled estuary. |
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