Full-azimuth, full-offset, high-fidelity vector marine seismic acquisition

2020 ◽  
Vol 39 (4) ◽  
pp. 238-247
Author(s):  
Michel Manin ◽  
Luc Haumonté ◽  
Eric Bathellier
Keyword(s):  
Data Analysis ◽  
Seismic Data ◽  
Technology Development ◽  
High Fidelity ◽  
Successful Performance ◽  
High Quality ◽  
Pilot Survey ◽  
Autonomous Surface Vehicles ◽  
Seismic Acquisition ◽  
Marine Seismic

Ten years ago, Kietta launched a project to develop a new method of marine seismic acquisition using midwater stationary cables and autonomous surface vehicles. We present the concept and the technology bricks and recount the successful performance of a commercial pilot survey. The objective of the technology is to enable flexible acquisitions and deliver high-quality, high-fidelity seismic data without sacrificing productivity. After reviewing existing marine seismic acquisition methods, we describe the technology development, including sea trials. The geophysical advantages of acquiring true 3D/four-component data are demonstrated by seismic data analysis, including simultaneous sources and associated productivity calculation.

Study of Onega lake Petrozavodsk bay sub-bottom sediments using complex geophysical and geological data analysis

2019 ◽  
pp. 98-104
Author(s):  
M. I. Aleshin ◽  
V. G. Gaynanov ◽  
M. Yu. Tokarev ◽  
A. E. Rybalko ◽  
D. A. Subetto
Keyword(s):  
Seismic Data ◽  
Quaternary Sediments ◽  
Geological Interpretation ◽  
Onega Lake ◽  
Engineering Data ◽  
Seismic Acquisition ◽  
Data Survey ◽  
Survey Results ◽  
Marine Engineering ◽  
Marine Seismic

This article examines the results of geological interpretation of marine engineering data acquired in Onega lake. The survey included marine seismic acquisition and geological sampling. Seismo-stratigrafic units were picked according to processed seismic data. Survey results allowed to make a seismo-stratigrafic column of quaternary sediments of Onega lake. The column could be used to analyze the structure of open part of the lake as well.

The Design of Multichannel Marine Seismic Acquisition Unit Based on ADS1282

2014 ◽  
Vol 989-994 ◽  
pp. 3274-3277
Author(s):  
Zhi Li Zhang ◽  
Ying Zhang ◽  
Peng Chen
Keyword(s):  
Data Acquisition ◽  
Seismic Data ◽  
Signal Acquisition ◽  
Data Sampling ◽  
Analog To Digital ◽  
Field Programmable ◽  
Seismic Acquisition ◽  
Seismic Data Acquisition ◽  
Marine Seismic ◽  
Data Acquisition Unit

For marine seismic data acquisition needs,a multichannel marine seismic data acquisition unit was designed,which used the 32-bit analog-to-digital ADS1282 as a core and Field programmable gate array (FPGA) as the acquisition controller.The unit can achieve multichannel seismic data sampling and transmission functions.The design fully used with the design ADS1282 chip integration,with the corresponding anti-jamming measures,not only simplified the circuit design,but also ensured the quality of signal acquisition and system stability.the design used FPGA to realize a multichannel hydrophone signal synchronization sampling.

scholarly journals Flow and swell noise in marine seismic data

Geophysics ◽  
2009 ◽  
Vol 74 (2) ◽  
pp. Q17-Q25 ◽  
Author(s):  
Thomas Elboth ◽  
Bjørn Anders Reif ◽  
Øyvind Andreassen
Keyword(s):  
Turbulent Flow ◽  
Seismic Data ◽  
Signal To Noise Ratio ◽  
Fluid Dynamic ◽  
Pressure Fluctuations ◽  
Weather Conditions ◽  
Flow Noise ◽  
Seismic Acquisition ◽  
Dynamic Perspective ◽  
Marine Seismic

Various weather-related mechanisms for noise generation during marine seismic acquisition were addressed from a fluid-dynamic perspective. This was done by analyzing a number of seismic lines recorded on modern streamers during nonoptimal weather conditions. In addition, we examined some of the complex fluid-mechanics processes associated with flow that surrounds seismic streamers. The main findings were that noise in the [Formula: see text] range is mostly the result of direct hydrostatic-pressure fluctuations on the streamer caused by wave motion. For normal swell noise above [Formula: see text] and for crossflow noise, a significant portion of the observed noise probably comes from dynamic fluctuations caused by the interaction between the streamer and fluid structures in its turbulent boundary layer. This explanation differs from most previous work, which has focused on streamer oscillations, bulge waves inside old fluid-filled seismic streamers, or strumming/tugging as the main source of weather-related noise. Although modern streamers are less sensitive to such sources of noise, their ability to tackle the influence on turbulent flow noise has not improved. This implies that noise induced by turbulent flow has increased its relative impact on modern equipment. To improve the signal-to-noise ratio on seismic data, design issues related to flow noise must be addressed.

scholarly journals PENERAPAN METODE F-K DEMULTIPLE DALAM KASUS ATENUASI WATER-BOTTOM MULTIPLE

2016 ◽  
Vol 11 (1) ◽  
pp. 33
Author(s):  
Subarsyah Subarsyah ◽  
Sahudin Sahudin
Keyword(s):  
Seismic Data ◽  
Final Section ◽  
Signal To Noise Ratio ◽  
Multiple Reflections ◽  
Seismic Section ◽  
Multiple Attenuation ◽  
Seismic Acquisition ◽  
Marine Seismic ◽  
Second Category ◽  
Water Bottom

Keberadaan water-bottom multiple merupakan hal yang tidak bisa dihindari dalam akuisisi data seismik laut, tentu saja hal ini akan menurunkan tingkat perbandingan sinyal dan noise. Beberapa metode atenuasi telah dikembangkan dalam menekan noise ini. Metode atenuasi multiple diklasifikasikan dalam tiga kelompok meliputi metode dekonvolusi yang mengidentifikasi multiple berdasarkan periodisitasnya, metode filtering yang memisahkan refleksi primer dan multiple dalam domain tertentu (F-K,Tau-P dan Radon domain) serta metode prediksi medan gelombang. Penerapan metode F-K demultiple yang masuk kategori kedua akan diterapkan terhadap data seismik PPPGL tahun 2010 di perairan Teluk Tomini. Atenuasi terhadap water-bottom multiple berhasil dilakukan akan tetapi pada beberapa bagian multiple masih terlihat dengan amplitude relatif lebih kecil. F-K demultiple tidak efektif dalam mereduksi multiple pada offset yang pendek dan multiple pada zona ini yang memberikan kontribusi terhadap keberadaan multiple pada penampang akhir. Kata kunci : F-K demultiple, multiple, atenuasi The presence of water-bottom multiple is unavoidable in marine seismic acquisition, of course, this will reduce signal to noise ratio. Several attenuation methods have been developed to suppress this noise. Multiple attenuation methods are classified into three groups first deconvolution method based on periodicity, second filtering method that separates the primary and multiple reflections in certain domains (FK, Tau-P and the Radon domain) ang the third method based on wavefield prediction. Application of F-K demultiple incoming second category will be applied to the seismic data in 2010 PPPGL at Tomini Gulf waters. Attenuation of the water-bottom multiple successful in reduce multiple but in some parts of seismic section multiple still visible with relatively smaller amplitude. FK demultiple not effective in reducing multiple at near offset and multiple in this zone contribute to the existence of multiple in final section. Key words : F-K demultiple, multiple, attenuation

Simultaneous vibroseis data separation through sparse inversion

2019 ◽  
Vol 38 (8) ◽  
pp. 625-629 ◽  
Author(s):  
Jiawen Song ◽  
Peiming Li ◽  
Zhongping Qian ◽  
Mugang Zhang ◽  
Pengyuan Sun ◽  
...  
Keyword(s):  
Seismic Data ◽  
High Fidelity ◽  
Data Sets ◽  
Sparse Constraint ◽  
Coherent Signal ◽  
Additional Processing ◽  
Seismic Acquisition ◽  
Sparse Inversion ◽  
Data Separation ◽  
Simultaneous Source

Compared with conventional seismic acquisition methods, simultaneous-source acquisition utilizes independent shooting that allows for source interference, which reduces the time and cost of acquisition. However, additional processing is required to separate the interfering sources. Here, we present an inversion-based deblending method, which distinguishes signal from blending noise based on coherency differences in 3D receiver gathers. We first transform the seismic data into the frequency-wavenumber-wavenumber domain and impose a sparse constraint to estimate the coherent signal. We then subtract the estimated signal from the original input to predict the interference noise. Driven by data residuals, the signal is updated iteratively with shrinking thresholds until the signal and noise fully separate. We test our presented method on two 3D field data sets to demonstrate how the method proficiently separates interfering vibroseis sources with high fidelity.

scholarly journals OBTAINING HIGH-QUALITY SEISMIC DATA IN THE NORTHERN PERM KRAI SWAMPY AREAS

2020 ◽  
Vol 20 (2) ◽  
pp. 115-125
Author(s):  
Iurii M. Zakharov ◽  
◽  
Ivan S. Putilov ◽  
Keyword(s):  
Seismic Data ◽  
Seismic Exploration ◽  
Quality Data ◽  
Primary Data ◽  
Pulse Source ◽  
High Quality ◽  
Surface Conditions ◽  
Geological Interpretation ◽  
Pilot Survey ◽  
Perm Krai

The study undertakes to solve the problem of obtaining reliable seismic data in swampy areas. Raw hydrocarbon deposits in the North of Perm Krai are a promising asset, but their geological survey is constrained due to problematic surface conditions. Seismic exploration is the most detailed and reliable remote method of geological subsurface studies, but any state-of-the-art seismic 3D survey requires covering a much larger surface area than an actual area of a targeted subsurface survey. Swamps tend to strongly attenuate seismic waves, thus complicate a further geological interpretation of obtained data, and significantly limit the choice of engineering tools and techniques of surveying. Also it is impossible to avoid the influence of hard surface conditions in territories extending over hundreds of square kilometers. In order to explore the possibility of obtaining high-quality data in such conditions, we offer a comprehensive pilot survey using various recording and seismic wave excitation facilities. We analyzed and explored the possibility of solving this problem by using advanced seismic exploration methods. The study looks into the technology of obtaining primary data and into the stage of information processing for its further geological interpretation. This is the first time that Geoton seismic pulse source and GSONE high-sensitivity seismic receivers have been used for these purposes. According to the findings, there is an obvious advantage of using the blast over pulse source, especially in the swamp bed itself. At the same time, Geoton proved to be highly eco-friendly and safe, which makes it possible to use it in seismic exploration works of inhabited areas. The results of processing the pilot survey data show that the single seismic receivers produce wave patterns with the best quality and accuracy. The paper offers the seismic exploration techniques in swampy conditions and in territories that have increased requirements to environmental protection and safety.

Super-sparse marine 3D: A game changer for seismic exploration

2022 ◽  
Vol 41 (1) ◽  
pp. 19-26
Author(s):  
Patrick Charron ◽  
Erwan L'Arvor ◽  
Jens Fasterling ◽  
Guillaume Richard
Keyword(s):  
Seismic Data ◽  
Seismic Exploration ◽  
Complete Coverage ◽  
Fast Acquisition ◽  
Environment Exposure ◽  
Seismic Acquisition ◽  
Marine Seismic ◽  
Safety And Environment ◽  
Processing Steps ◽  
Game Changer

TotalEnergies SE and partners Shell and PetroSA recently completed the acquisition and processing of a large (10,000 km2) ultra-sparse (200 m between streamers) marine seismic acquisition survey off the west coast of South Africa in block 5/6/7 using a large PGS Titan Class Ramform vessel. The sparse design enabled fast acquisition and low survey cost and health, safety, and environment exposure. Advances in sparse processing enabled high-quality final seismic data consistent with the exploration objectives. In addition, DUG optimized the 4D regularization/interpolation parameters to approach the near offsets differently than the offsets with more complete coverage to help several processing steps. The survey was designed to be upgradable to a higher-resolution survey if needed via the addition of a custom regular infill pattern, either in its entirety or over targeted areas.

Formation geological depth image according to refraction and reflection marine seismic data

2017 ◽  
Vol 39 (6) ◽  
pp. 106-121
Author(s):  
A. O. Verpahovskaya ◽  
V. N. Pilipenko ◽  
Е. V. Pylypenko
Keyword(s):  
Seismic Data ◽  
Depth Image ◽  
Marine Seismic

PROCESSING AND IMAGING OF MARINE SEISMIC DATA FROM THE JEQUITINHONHA BASIN (BAHIA, BRAZIL)

2016 ◽  
Vol 33 (3) ◽  
Author(s):  
Lourenildo W.B. Leite ◽  
J. Mann ◽  
Wildney W.S. Vieira
Keyword(s):  
Seismic Data ◽  
Sedimentary Basins ◽  
Study Results ◽  
Marine Seismic ◽  
Present Case Study

ABSTRACT. The present case study results from a consistent processing and imaging of marine seismic data from a set collected over sedimentary basins of the East Brazilian Atlantic. Our general aim is... RESUMO. O presente artigo resulta de um processamento e imageamento consistentes de dados sísmicos marinhos de levantamento realizado em bacias sedimentares do Atlântico do Nordeste...

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