摘要
计算效率在一定程度上制约了全波形反演(FWI)技术的工业化应用,其中,步长的计算是影响计算效率的重要因素。常用的抛物插值类方法求取步长需要两次或多次正演计算,效率较低。在步长计算过程中引入混叠数据反演思想,采用多震源同时正演并直接基于混叠数据计算一次步长,较大幅度地减少计算步长的运行时间。此外,基于多节点并行同时计算多个试探步长,进一步提高计算效率和计算精度。将本文方法应用于典型中原模型和国际标准Marmousi模型试算,实验结果表明:本文方法与常规方法在反演精度上基本一致,但大幅度提高了运行效率,其中中原模型的运算效率提高43.75%,Marmousi模型的运行效率提高44.32%。
Full waveform inversion(FWI) needs large amount of calculation, which is one of the key constraints for production. The calculation of step length with parabolic interpolation method requires at least two addition forward simulations, which directly influences the efficiency of the inversion. In order to improve the efficiency of step-size calculation, this paper combines amulti-source modeling into the step-length calculation. Combining parallel computing and adaptive algorithm,multiple steps can be calculated simultaneously, which then leads to a new acoustic full waveform inversion of multi-step preferred optimization based on multi-source. Applying the new method into Zhongyuan model and Marmousi model, we can draw the conclusions that, firstly, the new method has basically achieved the same inversion precision;and secondly, the computational efficiency has increased by 43.75% and 44.32% for the two models, repsectively.
作者
国运东
黄建平
李庆洋
李振春
崔超
GUO Yundong;HUANG Jianping;LI Qingyang;LI Zhenchun;CUI Chao(School of Geosciences in China University of Petroleum (East China), Qingdao 266580, China;Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology,Qingdao 266071, China;Geophysical Exploration Research Institute of Zhongyuan Oilfield Company, SINOPEC, Puyang 457001, China)
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第2期45-52,共8页
Journal of China University of Petroleum(Edition of Natural Science)
基金
山东省重大创新工程(2017CXGC1608
2017CXGC1602)
中国科学院战略性先导科技专项(XDA14010303)
国际合作重点项目(41720104006)
国家油气重大专项(2016ZX05006-004
2016ZX05014001
2016ZX05002)
中原油田科技工程项目(2018XQ01-13)
关键词
全波形反演
抛物拟合
多震源正演
步长优化
full waveform inversion
parabolic fitting
multi-source modeling
step optimization
