Improved workflow for Single-Channel Seismic surveys in offshore wind farm site assessments: a case study from Fangchenggang, Guangxi
Abstract
A critical factor in the transition towards renewable energies is offshore wind, and therefore efficient site investigation to assure the safety and stability of the wind turbines' foundations is needed. Conventionally, borehole drilling and in-situ testing are used. Although these techniques can provide accurate geological data, their costs are prohibitive and their scope of survey is restricted. This drives the need for complementary geophysical survey methods. The Single-Channel Seismic (SCS) method is a cost-effective and rapid technique that can be employed for regional seabed survey. However, low signal-to-noise ratio (SNR) and poor stratigraphic continuity result when applying conventional processing workflow on seismic data obtained from complex settings, such as thick sand layers, shallow water environment with the presence of strong multiples, and sea surface swell conditions. To overcome these problems, an optimized SCS processing workflow which introduces three new techniques is proposed: (i) eigenvalue based swell correction with adaptive sliding window smoothing, (ii) shearlet transform based sparse representation of seismic data to remove random noise, and (iii) combined predictive deconvolution (for short period multiples) and SRME with Bayesian separation (for long period multiples). This algorithm has been applied to a field data survey at Fangchenggang, Guangxi (water depths: 0-25 m, total area is 99 km 2 ), and a substantial increase is observed: SNR…
Read the paper
Related studies
- Current state and future directions for deep learning based automatic seismic fault interpretation: A systematic review
- Physics of Partially Saturated Porous Media: Residual Saturation and Seismic-Wave Propagation
- Modern Imaging Using Seismic Reflection Data
- Effects of marine seismic surveys on free-ranging fauna: a systematic literature review
- A review of the recent seismic activity in the southern part of egypt (upper egypt)
- A review of research on mechanism of seismic attenuation and energy compensation
Go deeper in Evidence Hub
Evidence Hub adds a study data sheet (design, sample size, evidence level, key numbers), an AI summary and a chat grounded in the paper's text.