Feasibility of sparker source in marine seismic exploration: data analysis and processing

Wang, Xiangchun; Qi, Bin; Zhao, Qian; Wang, Weiwei; Yu, Kaiben

doi:10.1007/s11600-019-00346-7

Cited by 8 publications

(5 citation statements)

References 17 publications

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“…1b). The waveform of the direct arrival in sparker data provides information about the signal quality generated by the sparker source, and a consistent direct arrival wave from trace to trace indicates that the sparker source is operating properly producing a similar seismic signal for each shot (Wang et al 2019).…”

Section: Direct Wavesmentioning

confidence: 99%

“…The theoretical framework of some data processing methods, particularly for the suppression of multiple re ections, is generally applicable to multi-channel seismic data, and considerable effort may be required for the elimination of multiple re ections and random noise in single-channel sparker seismic data (Santos et al 2021;Wang et al 2019;Kluesner et al 2019;Wu et al 2020;Duchesne et al 2007).…”

Section: Introductionmentioning

confidence: 99%

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Optimal Processing of Single-Channel Sparker Marine Seismic Data

Nasif

2023

Preprint

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Single-channel sparker seismic reflection systems are currently preferred in offshore geo-engineering studies due to their cost-effectiveness, ease of use in shallow areas, their high-resolution data, and straightforward data processing. However, the distinctive characteristics of sparker data introduce specific challenges in the processing of single-channel seismic datasets. These include (i) unavailability of the stacking process for single-channel seismic data, which is highly effective in eliminating random and coherent noise, (ii) inability to derive subsurface velocity distribution from single-channel seismic profiles, (iii) limitations imposed by ghost reflections and bubble effects as well as random noise amplitudes, and (iv) the suitability of only predictive deconvolution for suppressing multiple reflections. Applications demonstrate that the inability to apply the stacking process to single-channel seismic data poses a significant challenge in suppressing both random and coherent noise, and increasing the signal-to-noise (S/N) ratio. The F-X prediction filter has proven highly effective in mitigating random noise in sparker data. Appropriate determination of operator length and prediction lag parameters allows predictive deconvolution to effectively suppress multiple reflections, despite some residual multiple amplitudes in the output. Spiking deconvolution significantly eliminates ghost reflections and bubble effects, enhancing temporal resolution by eliminating the ringy appearance of the input signal. However, transforming the source wavelet to its minimum phase or zero phase equivalent is essential prior to deconvolution. Trace mixing is a crucial data processing step for enhancing sparker data resolution. The method can be applied as weighted mix for random noise suppression or as trimmed mix for suppressing high-amplitude spike-like noises.

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Section: Direct Wavesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimal Processing of Single-Channel Sparker Marine Seismic Data

Nasif

2023

Preprint

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“…60 With this technique, the sparker source data are capable to achieve vertical sections with high resolution and feasible to be a practical technique for high-accuracy gas hydrate exploration in the SCS. 61 Levashov et al preliminarily investigated frequencyresonance characters within the surveyed area in the SCS. Confirmed by seismic survey and drilling, it is possible to assess the prospects for the detection of gas hydrate accumulation using the frequency-resonance method of satellite images processing.…”

Section: Coring Techniquesmentioning

confidence: 99%

“…Wang et al designed a processing technique to analyze and attenuate the noise occurring in sparker source data . With this technique, the sparker source data are capable to achieve vertical sections with high resolution and feasible to be a practical technique for high-accuracy gas hydrate exploration in the SCS …”

Section: Advances On Natural Gas Hydrate Exploration In the Scsmentioning

confidence: 99%

Recent Advances on Natural Gas Hydrate Exploration and Development in the South China Sea

Jian-wu

2021

Energy Fuels

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Because of the urgency of energy transition for a net-zero society, the world’s gas demand is rapidly increasing. Natural gas hydrate (NGH) is regarded as the next alternate energy resource to meet the demand, thanks to its high energy density and enormous reserves. As two successful production trials and a series of relevant drilling expeditions were implemented in the northern slope of the South China Sea (SCS), it may now be the most promising district for NGH exploitation in the world. The objective of this work is to review the recent research advances on hydrate exploration status, reservoir geological features, hydrate-bearing sediment geophysical properties, and hydrate exploitation techniques related to the hydrate reservoirs in the SCS. Geological surveys, well logging and core sampling were performed and helped the analysis of hydrate occurrence, gas origin, and accumulation mechanism. It is inferred that both microgenic and thermogenic gas present in SCS hydrate reservoirs and the hydrate accumulation is primarily controlled by the structure of the gas chimney. The characteristics of high porosity, low permeability, weak diagenesis, weak strength, and complex hydrate dissociation behaviors of the gas hydrate-bearing sediments from the SCS determined that innovative exploitation approaches are required. Different well configurations and reservoir stimulation techniques were proposed to enhance the production efficiency and evaluated through simulation and laboratory experiments. As the NGH development process in the SCS progresses continuously, it attracts more and more research interests from academic and engineering communities. We are convinced that, with constant diligence and effort, China will achieve the goal of safe and efficient commercial exploitation in the near future.

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“…For this reason, sparker sources have been widely used in the high-resolution seismic surveys. [1][2][3][4] Currently, all sparker sources are based on the underwater incomplete (corona-like) discharge, because its repeatability is better and the loop current is lower than for a complete (arc) discharge. [5][6][7] For complete discharges, sufficient modeling works have been reported, specifically with phenomenological [8][9][10][11][12] and physicochemical [13][14][15][16][17] models.…”

mentioning

confidence: 99%

A simple model for evaluating the performance of sparker source with multi-electrode array

Zhang,

Ding

et al. 2024

Physics of Fluids

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Sparker sources have been widely applied in high-resolution seismic explorations. However, to date, there exists no model that can directly predict the electro-acoustic characteristics of a sparker source with a multi-electrode array. In this Letter, we propose an analytical water-resistance model that yields a more accurate loop current. A simplified energy conservation model and the multi-bubble dynamics equations are used to evaluate the electro-acoustic process. Considering the bubble interaction will give a better prediction of multi-bubble dynamics. Regardless of the bubble interaction, the model is also able to obtain the desirable loop current and shockwave. Finally, with the influence of electrode considered, we use the model to evaluate the performance of a 50 × 8 array. The modeling results agree well with the field trials.

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Feasibility of sparker source in marine seismic exploration: data analysis and processing

Cited by 8 publications

References 17 publications

Optimal Processing of Single-Channel Sparker Marine Seismic Data

Optimal Processing of Single-Channel Sparker Marine Seismic Data

Recent Advances on Natural Gas Hydrate Exploration and Development in the South China Sea

A simple model for evaluating the performance of sparker source with multi-electrode array

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