Full-wave-equation depth extrapolation for true amplitude migration based on a dual-sensor seismic acquisition system

You, Jiachun; Li, Guangcai; Liu, Xuewei; Han, Wenzhong; Zhang, Guangde

doi:10.1093/gji/ggv535

Cited by 14 publications

(4 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is very hard to meet the requirements of boundary conditions, so researchers have separated the two-way wave equation mathematically and developed one-way wave equation migration methods. In order to handle the boundary conditions, You et al [23] presented a dual-sensor seismic acquisition system and performed the wavefield depth migration on the base of the two-way wave equation. Because the two-way wave equation depth migration method is on the base of fullwave equation, theoretically it also has no limited imaging angles.…”

Section: Introductionmentioning

confidence: 99%

Depth Migration Based on Two-Way Wave Equation to Image OBS Multiples: A Case Study in the South Shetland Margin (Antarctica)

et al. 2020

Self Cite

View full text Add to dashboard Cite

With the development of marine seismic exploration, the ocean bottom seismometer (OBS) as a new seismic acquisition technology has been widely concerned. Although multiple waves are frequently viewed as noises, they may carry a wealth of subsurface information and produce a broader illumination than primary waves. To perform multiple wave imaging, we propose to utilize a two-way wave equation depth wavefield extrapolation method which is rarely used in this field. A simple dipping model is imaged by using primary and multiple waves, which proves the superiority of multiple waves in imaging over the primary waves and lays a foundation for practical application. Moreover, the comparison of multiple imaging results by reverse time migration and those by our proposed method demonstrates that our proposed method requires less storage space. In this study, we apply this migration method to actual OBS data collected in the South Shetland margin (Antarctica), where gas hydrates have been well documented. Firstly, the wavefield separation method is adopted to process the OBS data, so as to produce reliable primary and multiples waves; secondly, the ray-tracing method is used to derive the velocity field; and finally, the depth wavefield extrapolation method based on the two-way wave equation is applied to image primary and multiple waves. Migration results show that multiple waves provide a broader illumination and a clearer sediment structure than primary waves, especially for the highly shallow reflections.

show abstract

Section: Introductionmentioning

confidence: 99%

Depth Migration Based on Two-Way Wave Equation to Image OBS Multiples: A Case Study in the South Shetland Margin (Antarctica)

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…This over/ under bilayer sensor seismic acquisition system has a geophone located at two different depths, respectively. You et al (2016) propose a land seismic acquisition system and performed the full wave equation with the spectral projector technique to recover the true amplitudes of reflectors. The advantage of the over/under bilayer sensor seismic acquisition system is that it can provide enough conditions to solve the full wave equation in the depth domain.…”

Section: Introductionmentioning

confidence: 99%

“…Compared with the full wave equation for depth migration used in You et al (2016), these new bilayer sensor migration methods are implemented with one-way propagators so that it can take advantage of the achievements of one-way wave propagators. However, our proposed migration method is rooted in the two-way wave equation, which means that it has the potential to calculate more accurate wavefields at wide angles.…”

Section: Introductionmentioning

confidence: 99%

“…In their work, the spectral projector filter has proven to be able to preserve the imaging energy for steeply dipping structures. Moreover, You et al (2016) use the spectral projector filter in the full wave equation depth extrapolation to guarantee the propagating wavefield correctly. Given those advantages of the spectral projector filter, we prefer to use this method for removing evanescent waves in our bilayer sensor migration.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Two-way wave equation-based depth migration using one-way propagators on a bilayer sensor seismic acquisition system

You

Liu

et al. 2018

GEOPHYSICS

Self Cite

View full text Add to dashboard Cite

Conventional migration uses the seismic data set recorded at a given depth as one initial condition from which to implement wavefield extrapolation in the depth domain. In using only one initial condition to solve the second-order acoustic wave equation, some approximations are used, resulting in the limitation of imaging angles and inaccurate imaging amplitudes. We use an over/under bilayer sensor seismic data acquisition system that can provide the two initial conditions required to make the second-order acoustic wave equation solvable in the depth domain, and we develop a two-way wave equation depth migration algorithm by adopting concepts from one-way propagators, called bilayer sensor migration. In this new migration method, two-way wave depth extrapolation can be achieved with two one-way propagators by combining the wavefields at two different depths. It makes it possible to integrate the advantages of one-way migration methods into the bilayer sensor system. More detailed bilayer sensor migration methods are proposed to demonstrate the feasibility. In the impulse response tests, the propagating angle of the bilayer sensor migration method can reach up to 90°, which is superior to those of the corresponding one-way propagators. To test the performance, several migration methods are used to image the salt model, including the one-way generalized screen propagator, reverse time migration (RTM), and our bilayer sensor migration methods. Bilayer sensor migration methods are capable of imaging steeply dipping structures, unlike one-way propagators; meanwhile, bilayer sensor migration methods can greatly reduce the numbers of artifacts generated by salt multiples in RTM.

show abstract

First-Order Acoustic Wave Equation Reverse Time Migration Based on the Dual-Sensor Seismic Acquisition System

You

Liu

2017

Pure Appl. Geophys.

View full text Add to dashboard Cite

Full-wave-equation depth extrapolation for true amplitude migration based on a dual-sensor seismic acquisition system

Cited by 14 publications

References 23 publications

Depth Migration Based on Two-Way Wave Equation to Image OBS Multiples: A Case Study in the South Shetland Margin (Antarctica)

Depth Migration Based on Two-Way Wave Equation to Image OBS Multiples: A Case Study in the South Shetland Margin (Antarctica)

Two-way wave equation-based depth migration using one-way propagators on a bilayer sensor seismic acquisition system

First-Order Acoustic Wave Equation Reverse Time Migration Based on the Dual-Sensor Seismic Acquisition System

Contact Info

Product

Resources

About