Least squares reverse-time migration in the pseudodepth domain and reservoir exploration

Sun, Xuewen; Jia, Yan-Rui; Zhang, Min; Li, Qingyang; Li, Zhenchun

doi:10.1007/s11770-018-0681-x

Cited by 8 publications

(2 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Plessix (2013) introduced the concept of the pseudo-depth domain into FWI, which can effectively avoid the ambiguity caused by velocity depth in VTI media. Li et al (2017) and Sun et al (2018) proposed a pseudodepth domain cross-correlation least-squares inverse time migration method, which weakens the ambiguity of velocity and depth in traditional least-squares inverse time migration, improves the fault tolerance, computational efficiency, and reduces the memory occupied.…”

Section: Introductionmentioning

confidence: 99%

Pseudo-depth domain reverse time migration in VTI medium based on GPU parallel strategy

Xinwen

Huang²,

Jiang³

et al. 2023

Front. Earth Sci.

View full text Add to dashboard Cite

As one of the main imaging methods, a lot of attention has been directed to reverse time migration anisotropic media. However, reverse time migration still faces cost and memory limitations, especially in imaging high frequencies. A coordinate transformation strategy in transversely isotropic media with a vertical axis of symmetry (VTI) was utilized to obtain high-resolution images useful for stratigraphic interpretation. The coordinate transformation converted traditional depth domain imaging into pseudo-depth domain imaging. In addition, this paper used the Graphics Processing Unit (GPU) parallel strategy and compared the imaging approach with the conventional acoustic isotropy method. By testing several models and field data, it concludes that Graphics Processing Unit parallel strategy can significantly improve the computational efficiency of imaging. The pseudo-depth domain method also has obvious advantages in computational time and memory consumption. Moreover, it is more reasonable when considering anisotropy for complex laminated layers.

show abstract

Section: Introductionmentioning

confidence: 99%

Pseudo-depth domain reverse time migration in VTI medium based on GPU parallel strategy

Xinwen

Huang²,

Jiang³

et al. 2023

Front. Earth Sci.

View full text Add to dashboard Cite

show abstract

“…In the context of RTM, the least‐squares reverse time migration (LSRTM) has been developed to improve imaging quality based on two‐way wave equation (Schuster, 1993; Yao & Wu, 2015; Li et al., 2017; Liu et al., 2017; Li et al., 2021). With the rapid development of computer technology, including the widespread use of multi‐node parallel computer technology, LSRTM based on two‐way wave equation has gradually been applied to field and synthetic data imaging (Dong et al., 2012; Zhang et al., 2015; Hou et al., 2016; Wu et al., 2016; Chen et al., 2017; Li et al., 2017b; Sun et al., 2018; Yao et al., 2022). The LSRTM advantages include the enhancement of imaging resolution and the dramatic minimization of imaging artefacts in comparison to RTM.…”

Section: Introductionmentioning

confidence: 99%

Least‐squares reverse time migration based on an efficient pure qP‐wave equation

Huang

Mao

et al. 2023

Geophysical Prospecting

View full text Add to dashboard Cite

Seismic waves propagating in anisotropic earth media suffer from waveform distortion, which leads to degraded resolution in seismic data imaging if this adverse effect is not corrected. Additionally, the wavefields simulated by the traditional coupled pseudo‐acoustic wave equations contain undesired shear wave artefacts and are unstable when Thomsen's anisotropy parameter ε is less than δ. To address these issues, many pure qP‐wave equations are proposed to describe wave propagation in anisotropic media. However, these equations are either low precision or high accuracy but computationally expensive. Considering the trade‐off between the computation efficiency and simulation accuracy, we derive a pure qP‐wave equation from the exact dispersion formula in tilted transverse isotropic media. The newly derived equation has only two higher order partial derivatives, which can better balance the accuracy and efficiency than the previous pure qP‐wave equations. The least‐squares reverse time migration method can balance amplitudes, suppress migration artefacts and improve imaging resolution. Then, based on the newly derived pure qP‐wave equation, we derive the Born modelling operator and adjoint migration operator and develop an anisotropic least‐squares reverse time migration method. To achieve the accelerated convergence, we introduce a generalized minimum residual algorithm to implement the anisotropic least‐squares reverse time migration method. Numerical simulation results show that the proposed pure qP‐wave equation outperforms the previous equations in balancing the trade‐off between accuracy and efficiency. In addition, synthetic examples demonstrate the effectiveness and robustness of our proposed anisotropic least‐squares reverse time migration method in correcting the deviations due to anisotropic effects.

show abstract

Multiparameter least-squares reverse time migration for acoustic—elastic coupling media based on ocean bottom cable data

Huang

Liu

et al. 2019

Appl. Geophys.

View full text Add to dashboard Cite

Least squares reverse-time migration in the pseudodepth domain and reservoir exploration

Cited by 8 publications

References 12 publications

Pseudo-depth domain reverse time migration in VTI medium based on GPU parallel strategy

Pseudo-depth domain reverse time migration in VTI medium based on GPU parallel strategy

Least‐squares reverse time migration based on an efficient pure qP‐wave equation

Multiparameter least-squares reverse time migration for acoustic—elastic coupling media based on ocean bottom cable data

Contact Info

Product

Resources

About