【摘要】：三維波動(dòng)方程數(shù)值模擬是復(fù)雜儲(chǔ)層波場特征分析和地震響應(yīng)識(shí)別模式建立的重要手段。針對(duì)大規(guī)模三維模型正演模擬面臨的內(nèi)存消耗巨大、計(jì)算耗時(shí)長的問題,使用MPI并行技術(shù)將模型切割計(jì)算,同時(shí)為了對(duì)局部復(fù)雜區(qū)域進(jìn)行精細(xì)模擬,引入變網(wǎng)格算法對(duì)速度場進(jìn)行局部加密,從空間上有效提高模擬精度;設(shè)計(jì)了適用于三維變網(wǎng)格算法的MPI并行子區(qū)域劃分策略,降低了計(jì)算網(wǎng)格點(diǎn)數(shù)和內(nèi)存需求。模型試算表明基于MPI并行變網(wǎng)格方法進(jìn)行大規(guī)模三維正演數(shù)值模擬減少了內(nèi)存消耗、提高了計(jì)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.
【作者單位】： 中國地質(zhì)大學(xué)地球物理與空間信息學(xué)院;地球內(nèi)部多尺度成像湖北省重點(diǎn)實(shí)驗(yàn)室;長江大學(xué)地球物理與石油資源學(xué)院;中海油研究總院;
【基金】：國家重大科技專項(xiàng)“南海深水區(qū)油氣勘探地球物理關(guān)鍵技術(shù)”(2016ZX05026-001) “地球內(nèi)部多尺度成像”湖北省重點(diǎn)實(shí)驗(yàn)室開放基金項(xiàng)目(SMLL-2015-08) “中國地質(zhì)科學(xué)院物化探研究所基本科研業(yè)務(wù)費(fèi)”項(xiàng)目(WHS201308)聯(lián)合資助
【分類號(hào)】：P631.4
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本文編號(hào)：2157056