论文成果
A Rapid Four-Dimensional Resistivity Data Inversion Method using Temporal Segmentation
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所属单位：
土建与水利学院
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发表刊物：
Geophys. J. Int
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关键字：
Electrical resistivity tomography (ERT); Downhole methods; Inverse theory; Numerical modelling; Time-series analysis.
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摘要：
4-D electrical resistivity tomography (ERT), an important geophysical method, is widely used to observe dynamic processes within static subsurface structures. However, because data acquisition and inversion consume large amounts of time, rapid changes that occur in the medium during a single acquisition cycle are difficult to detect in a timely manner via4-D inversion. To address this issue, a scheme is proposed in this paper for restructuring continuously measured data sets and performing GPU-parallelized inversion. In this scheme, multiple reference time points are selected in an acquisition cycle, which allows all of the acquired data to be sequentially utilized in a 4-D inversion. In addition, the response of the 4-D inversion to changes in the medium has been enhanced by increasing the weight of new data being added dynamically to the inversion process. To improve the reliability of the inversion, our scheme uses actively varied time-regularization coefficients, which are adjusted according to the range of the changes in model resistivity; this range is predicted by taking the ratio between the independent inversion of the current data set and historical 4-D inversion model. Numerical simulations and experiments show that this new 4-D inversion method is able to locate and depict rapid changes in medium resistivity with a high level of accuracy.
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全部作者：
Xinxin Zhang,Shenhua Liu,NingWang,JingWang,Deqiang Mao,Yonghao Pang
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第一作者：
Bin Liu
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论文类型：
基础研究
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通讯作者：
Zhengyu Liu
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论文编号：
69CCB9166F9B4FD39916469A16F7E7C8
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学科门类：
工学
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一级学科：
土木工程
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文献类型：
J
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卷号：
221
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页面范围：
586-602
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是否译文：
否
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发表时间：
2020-04-01
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收录刊物：
SCI
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