基于CEL算法的神狐海域泥火山内部物质运动过程数值模拟  

Numerical Simulation of Substance Motion in Mud Volcano in the Shenhu Area Based on CEL Algorithm

作　　者：刘晓艳 孙永福 宋玉鹏 修宗祥 李西双 宋丙辉 LIU Xiaoyan;SUN Yongfu;SONG Yupeng;XIU Zongxiang;LI Xishuang;SONG Binghui(First Institute of Oceanography,MNR,Qingdao 266061,China;National Deep Sea Center,Qingdao 266237,China)

机构地区：[1]自然资源部第一海洋研究所,山东青岛266061 [2]国家深海基地管理中心,山东青岛266237

出　　处：《海洋科学进展》2024年第2期325-336,共12页Advances in Marine Science

基　　金：国家自然科学基金项目(41876066)。

摘　　要：以南海北部神狐海域地震剖面识别的泥火山为基础,基于耦合的欧拉-拉格朗日算法(CEL)模拟了泥火山内部物质的运动过程。通过不同阶段的对比分析,研究探讨了泥火山的形成机理,总结了泥火山内部物质的运动特征及规律。数值模型的结果显示泥火山形成过程中物质的运移具有明显的阶段性变化,展现了物质在运移时的应力与应变的不规则变化规律,本文根据这些变化分析了泥火山形成过程中应力、应变与能量的强度变化趋势。地层在物质向上刺穿过程中受力分布表现出明显的不均匀性,中间部位的突起破裂引起两侧地层的隆升。由模拟结果提供的泥火山形成过程中内部物质的特征,可以推动对泥火山形成机制及过程的进一步认识,同时也能对深部底辟构造以及油气迁移提供理论指导。Based on the seismic profile identification of a mud volcano in the Shenhu area of the northern South China Sea,this study used coupled Eulerian-Lagrangian(CEL)algorithm to simulate the motion process of the material inside the mud volcano.Through the comparative analysis of different stages,this study indicated the formation mechanism of mud volcano and summarized the motion characteristics and rules of the materials in the mud volcano.The numerical modeling results showed that the fluid migration styles during the formation of mud volcano took place obvious changes in different stages,showing the irregular change law of fluid stress and strain during the fluid migration.Then this study analyzed the intensity variation trend of stress,strain and energy during the formation of mud volcano.In the process of fluid penetrating upward,the force distribution of the stratum shows obvious unevenness,and the protrusion in the middle part breaks and causes the uplift of the strata on both sides.The characteristics of the internal fluid during the formation of mud volcanoes provided by the simulation results in this study can promote the further understanding of the formation mechanism and process of mud volcanoes,and provide a theoretical guidance for the deep diapiric structure and hydrocarbon migration.

关 键 词：神狐海域 泥火山 CEL算法 刺穿 

分 类 号：P736[天文地球—海洋地质]