大规模变网格三维地震正演MPI并行策略与实现
发布时间：2018-08-01 08:57
【摘要】：三维波动方程数值模拟是复杂储层波场特征分析和地震响应识别模式建立的重要手段。针对大规模三维模型正演模拟面临的内存消耗巨大、计算耗时长的问题,使用MPI并行技术将模型切割计算,同时为了对局部复杂区域进行精细模拟,引入变网格算法对速度场进行局部加密,从空间上有效提高模拟精度;设计了适用于三维变网格算法的MPI并行子区域划分策略,降低了计算网格点数和内存需求。模型试算表明基于MPI并行变网格方法进行大规模三维正演数值模拟减少了内存消耗、提高了计算效率。
[Abstract]:Three-dimensional wave equation numerical simulation is an important method to analyze the wave field characteristics of complex reservoir and to establish the seismic response identification model. In order to solve the problem of huge memory consumption and long computation time faced by large-scale 3D model forward modeling, MPI parallel technology is used to cut the model and to simulate the local complex region. This paper introduces the variable mesh algorithm to encrypt the velocity field in order to effectively improve the simulation accuracy in space, and designs a MPI parallel subregion partition strategy for 3D mesh changing algorithm, which reduces the need for computing grid points and memory. The model trial table shows that large-scale 3D forward numerical simulation based on MPI parallel variable mesh method can reduce memory consumption and improve computational efficiency.
【作者单位】： 中国地质大学地球物理与空间信息学院;地球内部多尺度成像湖北省重点实验室;长江大学地球物理与石油资源学院;中海油研究总院;
【基金】：国家重大科技专项“南海深水区油气勘探地球物理关键技术”(2016ZX05026-001) “地球内部多尺度成像”湖北省重点实验室开放基金项目(SMLL-2015-08) “中国地质科学院物化探研究所基本科研业务费”项目(WHS201308)联合资助
【分类号】：P631.4
，
本文编号：2157056
[Abstract]:Three-dimensional wave equation numerical simulation is an important method to analyze the wave field characteristics of complex reservoir and to establish the seismic response identification model. In order to solve the problem of huge memory consumption and long computation time faced by large-scale 3D model forward modeling, MPI parallel technology is used to cut the model and to simulate the local complex region. This paper introduces the variable mesh algorithm to encrypt the velocity field in order to effectively improve the simulation accuracy in space, and designs a MPI parallel subregion partition strategy for 3D mesh changing algorithm, which reduces the need for computing grid points and memory. The model trial table shows that large-scale 3D forward numerical simulation based on MPI parallel variable mesh method can reduce memory consumption and improve computational efficiency.
【作者单位】： 中国地质大学地球物理与空间信息学院;地球内部多尺度成像湖北省重点实验室;长江大学地球物理与石油资源学院;中海油研究总院;
【基金】：国家重大科技专项“南海深水区油气勘探地球物理关键技术”(2016ZX05026-001) “地球内部多尺度成像”湖北省重点实验室开放基金项目(SMLL-2015-08) “中国地质科学院物化探研究所基本科研业务费”项目(WHS201308)联合资助
【分类号】：P631.4
，
本文编号：2157056
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