Four component imaging method for OBN data

● Joint acoustic and decoupled-elastic least-squares reverse time migration for simultaneously using water-land dual-detector data
● Ocean bottom dual-sensor Q-compensated elastic least-squares reverse time migration based on acoustic and separated-viscoelastic coupling equations

“Joint acoustic and decoupled-elastic least-squares reverse time migration for simultaneously using water-land dual-detector data” can be downloaded and viewed as a pdf, or click this link.

“Ocean bottom dual-sensor Q-compensated elastic least-squares reverse time migration based on acoustic and separated-viscoelastic coupling equations” can be downloaded and viewed as a pdf, or click this link.

Target-oriented seismic interferometric imaging method

● Staining algorithm for least-squares reverse time migration
● Regional staining reverse time migration algorithm based on energy‑constrained factors
● Viscoacoustic VTI media reverse time migration method in the complex-domain based on the staining algorithm (Accepted)
● Interferometric imaging by cross correlation in surface seismic profile with double green’s function

“Staining algorithm for least-squares reverse time migration” can be downloaded and viewed as a pdf, or click this link.

“Regional staining reverse time migration algorithm based on energy‑constrained factors” can be downloaded and viewed as a pdf, or click this link.

“INTERFEROMETRIC IMAGING BY CROSS CORRELATION IN SURFACE SEISMIC PROFILE WITH DOUBLE GREEN’S FUNCTION” can be downloaded and viewed as a pdf, or click this link.

AI for seismic velocity building

● we present a multiscale fusion network with shot record attention (MFNSR) module, which can construct velocity models directly from the original seismic record. The proposed network can obtain fine-grained complete semantic information in the shot record by multilayer fusion operation. Shot record attention (SR-attention) is proposed to reveal the medium-to-low frequency information in the shot record. The proposed random noise block enables better generalization of the model and higher accuracy in modeling the shot record speed of the entrained noise.

“Multiscale Fusion Network With SR-Attention for Seismic Velocity Model Building” can be downloaded and viewed as a pdf, or click this link.

Average-derivative Optimized 21-Point and Improved 25-Point Forward Modeling and Full Waveform Inversion in Frequency Domain

● To improve the adaptability of the forward modelling algorithm in the frequency domain, we derive a 21-point finite difference scheme based on the average derivative method (ADM), and calculate the difference coefficients and dispersion condition. In order to solve the problem of huge computational cost in frequency domain forward modelling, we also derive an improved 25-point finite difference scheme. The improved 25-point format is more accurate than the conventional 25-point format.

Compressive sensing and 3D conical Radon transform

● The 3D conical Radon transform for seismic signal processing
● 3D conic Radon domain compressive sensing adaptive suppression of near-surface noise (Under review)

“The 3D conical Radon transform for seismic signal processing” can be downloaded and viewed as a pdf, or click this link.

Acoustic-elasticviscoelastic forward modeling, RTM, LSRTM and FWI

● A hybrid grid method in an auxiliary coordinate system for irregular fluid–solid interface modelling
● Fluid-solid coupled full-waveform inversion in the curvilinear coordinates for ocean-bottom cable data
● P- and S-wave separated elastic reverse time migration for OBC data from fluid-solid coupled media with irregular seabed interfaces
● Acoustic-elastic coupled least-squares reverse time migration in marine environment with rugged seabed interface

“A hybrid grid method in an auxiliary coordinate system for irregular fluid–solid interface modelling” can be downloaded and viewed as a pdf, or click this link.

“Fluid-solid coupled full-waveform inversion in the curvilinear coordinates for ocean-bottom cable data” can be downloaded and viewed as a pdf, or click this link.

“P- and S-wave separated elastic reverse time migration for OBC data from fluid-solid coupled media with irregular seabed interfaces” can be downloaded and viewed as a pdf, or click this link.

“Acoustic-elastic coupled least-squares reverse time migration in marine environment with rugged seabed interface” can be downloaded and viewed as a pdf, or click this link.

Q-compensated RTM and LSRTM in viscoacoustic media including surface topography

● Q-compensated reverse time migration in viscoacoustic media including surface topography
● Q least-squares reverse time migration based on the first-orderviscoacoustic quasidifferential equations

“Q-compensated reverse time migration in viscoacoustic media including surface topography” can be downloaded and viewed as a pdf, or click this link.

“Q least-squares reverse time migration based on the first-orderviscoacoustic quasidifferential equations” can be downloaded and viewed as a pdf, or click this link.

Elastic least-squares reverse time migration with velocities and density perturbation

● We have proposed an elastic LSRTM with density variations method based on wave modes separation to reduce these crosstalk artefacts by using P- and S-wave decoupled elastic velocity–stress equations to derive demigration equations and gradient formulae with respect to Vp, Vs and ρ.

“Elastic least-squares reverse time migration with velocities and density perturbation” can be downloaded and viewed as a pdf, or click this link.

Topographic forward modeling, RTM, LSRTM and FWI

● Elastic full-waveform inversion for surface topography
● 3-D Least-Squares Reverse Time Migration in Curvilinear-τ Domain

“Elastic full-waveform inversion for surface topography” can be downloaded and viewed as a pdf, or click this link.

“3-D Least-Squares Reverse Time Migration in Curvilinear-τ Domain” can be downloaded and viewed as a pdf, or click this link.

“Topographic elastic least-squares reverse time migration based on vector P- and S-wave equations in the curvilinear coordinates” can be downloaded and viewed as a pdf, or click this link.

“Multi-scale full waveform inversion for areas with irregular surface topography in an auxiliary coordinate system” can be downloaded and viewed as a pdf, or click this link.

Harmonic noise suppression and aliasing signal separation for vibroseis data

● A joint special noise suppressing technology for vibroseis data after cross-correlation is proposed based on the characteristics of the two kinds of special noise, in which the harmonic noise is firstly suppressed by the predictive filtering method based on a feedback system, and then the surface response noise is suppressed by the frequency division method.

● Different techniques are used for vibroseis aliasing data acquired from different acquisition methods.

Optimized point spread function imaging-domain LSRTM

● To accurately calculate the inverse of the Hessian matrix, solve the PSF sparsity selection problem, and eliminate migration noise, we propose a velocity-adaptive irregular PSF deconvolution imaging using a Gaussian smoothing X-shaped denoising diffusion filtering operator. The velocity-adaptive irregular grid selection strategy allows for adaptive selection of the grid size based on the velocity of the different layers, ensuring maximum imaging accuracy and avoiding the risk of interference among PSFs. The Gaussian smoothing X-shaped denoising diffusion filtering operator eliminates migration noise and also prevents the introduction of deconvolution noise.

“Velocity-Adaptive Irregular Point Spread Function Deconvolution Imaging Using X-Shaped Denoising Diffusion Filtering” can be downloaded and viewed as a pdf, or click this link.

Attenuation compensation in anisotropic LSRTM and FWI

● Q-compensated least-squares reverse time migration with velocity-anisotropy correction based on the first-order velocity-pressure equations

● Viscoacoustic anisotropic full waveform inversion

“Q-compensated least-squares reverse time migration with velocity-anisotropy correction based on the first-order velocity-pressure equations” can be downloaded and viewed as a pdf, or click this link.

“Attenuation compensation in anisotropic least-squares reverse time migration based on the second-order equations” can be downloaded and viewed as a pdf, or click this link.

“Viscoacoustic anisotropic full waveform inversion” can be downloaded and viewed as a pdf, or click this link.

Imaging and velocity inversion methods of jointly using prismatic wave and primaries for imaging steeply dipping structures

● Topography-dependent Q-compensated least-squares reverse time migration of prismatic waves
● Steeply dipping structural target oriented viscoacoustic prismatic reverse time migration in frequency domain and its application
● Elastic reverse time migration of prismatic waves for surface topography based on decoupled elastic wave equations in the curvilinear coordinates
● Prismatic and full-waveform joint inversion

“Topography-Dependent Q-Compensated Least-Squares Reverse Time Migration of Prismatic Waves” can be downloaded and viewed as a pdf, or click this link.

“Velocity-Adaptive Irregular Point Spread Function Deconvolution Imaging Using X-Shaped Denoising Diffusion Filtering” can be downloaded and viewed as a pdf, or click this link.

“Velocity-Adaptive Irregular Point Spread Function Deconvolution Imaging Using X-Shaped Denoising Diffusion Filtering” can be downloaded and viewed as a pdf, or click this link.

Full-path Q compensated imaging by jointly using different-order multiples and primaries

● Viscoacoustic reverse time migration of joint primaries and different-order multiples

“Viscoacoustic reverse time migration of joint primaries and different-order multiples” can be downloaded and viewed as a pdf, or click this link.

“Full-path compensated least-squares reverse time migration of joint primaries and different-order multiples for deep-marine environment” can be downloaded and viewed as a pdf, or click this link.

“Viscoacoustic least-squares reverse-time migration of different-order free-surface multiples” can be downloaded and viewed as a pdf, or click this link.

Optimized FWI and RWI

● Elastic full-waveform inversion for surface topography
● Elastic full-waveform inversion based on the double-cross-shaped discrete flux-corrected transport
● Q-compensated full waveform inversion for velocity and density
● Cross-correlation Reflection Waveform Inversion based on a weighted norm of the time-shift obtained by Dynamic Image Warping
● Multi-scale full waveform inversion based on the double-cross diffusion filtering

“Elastic full-waveform inversion for surface topography” can be downloaded and viewed as a pdf, or click this link.

“Elastic full-waveform inversion based on the double-cross-shaped discrete flux-corrected transport” can be downloaded and viewed as a pdf, or click this link.

“Q-compensated full waveform inversion for velocity and density” can be downloaded and viewed as a pdf, or click this link.