VSP polarization angles determination: Wysin-1 processing case study

Zaręba, Mateusz; Danek, Tomasz

doi:10.1007/s11600-018-0200-8

Cited by 4 publications

(9 citation statements)

References 14 publications

(19 reference statements)

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“…It allowed for analysis of 11 lithological complexes of Silurian rocks (determined from well-logs) which corresponds to 4 macro-complexes separated on the base of velocity analysis for depth migration. The whole recording system was placed below high-attenuating Zechstein formation [1]. In the case of litology, they can be classified as anhydrite, halite, shale, and dolomite.…”

Section: Walkaway Vsp Acquisition and Region Characterizationmentioning

confidence: 99%

“…In this section, we introduce basic information about seismic processing of presented data in this paper just to cover the minimum to understand the aim of presented statistical analysis. The wide description of each procedure presented in this paper: pre-processing, rotation methods, and matching filter creation (including graphical illustrations) can be found in [1].…”

Section: Processing and Rotationsmentioning

confidence: 99%

“…It is clearly visible that data has three or four main concentrations. They can be correlated with 4 main velocities complexes shown in [1]. The worst option of processing (in case of polarization angles determination) is option 2 which makes KDE flat.…”

Section: Statistical Analysis and Eda Of Walkaway Vsp Datamentioning

confidence: 99%

“…Obtaining full anisotropy tensor using P-wave only from the walk-away VSP (Vertical Seismic Profiling) survey is not a trivial task, especially when the acquisition was gathered in challenging conditions [1]. The methodology for P-wave only inversion for local anisotropy estimation has been proposed by Grechka and Mateeva [2].…”

Section: Introductionmentioning

confidence: 99%

“…Beside difficulty of method itself, the acquisition was performed in difficult terrain after heavy rains and half of the measurements were carried out in uncased part of the well. Due to heavy rains, ground conditions between each sweep were varying significantly [1]. The main aim of this research was to find the quantitive information about which processing scheme is the best for obtaining reliable polarization angle using PCA (Principal Component Analysis) method for components rotation.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Some statistical consideration of azimuth and inclination angles determination based on walk - away VSP data in Python

2019

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It is a common knowledge that proper inclinations and azimuth angle determination is a critical step in processing and interpretation of walk-away VSP data. Additionally, an in-depth analysis of the uncertainty of these interpreted values requires the introduction of measurement errors. In this contribution, we present a statistical analysis of obtained polarization angles from three-component, multi-depth level, walk-away VSP using Python 3 programming language. Our analysis is presented in the context of different processing sequences and correlation with local features of the geological medium. We show that the obtained values of polarization angles and their errors can be strongly affected by processing sequence and - when done correctly - can give addition inside into features of analysis medium. Moreover, in some cases, even a presence of saturation can be express by polarization angles variations. Additionally, we examined the impact of well-casing on interpretational values of polarization angles.

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Section: Walkaway Vsp Acquisition and Region Characterizationmentioning

confidence: 99%

Section: Processing and Rotationsmentioning

confidence: 99%

Section: Statistical Analysis and Eda Of Walkaway Vsp Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Some statistical consideration of azimuth and inclination angles determination based on walk - away VSP data in Python

2019

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The use of S-guided CREP methodology for advanced seismic structure enhancing processing

Zaręba¹,

Laskownicka²,

Zając³

2019

Acta Geophys.

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To acquire refined seismic targets, the use of more accurate and more precise methods of seismic signal processing is crucial. Novel seismic processing approach is even more important in case of the complex geology of mountainous regions (e.g., Carpathians, Carpathian Foredeep) where sub-vertical layering of varying rock complex can be found, but also in case of old seismic data reprocessing (especially when the signal-to-noise ratio and general quality are low). Regardless of many research papers and significant progress in seismic processing techniques, a properly processed and interpreted seismic image is still hardly affordable for this region. Obtaining a new value in seismic data processing is a core function of the presented research. The use of dip-guided filtering combined with beam partitioned analysis and Z-domain dip analysis for reprocessing of 3D and 2D seismic data from the Carpathians region has been studied.

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P-Wave-Only Inversion of Challenging Walkaway VSP Data for Detailed Estimation of Local Anisotropy and Reservoir Parameters: A Case Study of Seismic Processing in Northern Poland

2021

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In this paper, we present a detailed analysis of walkaway vertical seismic profiling (VSP) data, which can be used to obtain Thomsen parameters using P-wave-only inversion. Data acquisition took place in difficult field conditions, which influenced the quality of the data. Therefore, this paper also shows a seismic data processing scheme that allows the estimation of correct polarization angles despite poor input data quality. Moreover, we showed that it is possible to obtain reliable and detailed values of Thomsen’s anisotropy parameters for data that are challenging due to extremely difficult field conditions during acquisition and the presence of an overburden of salt and anhydrite (Zechstein formation). This complex is known for its strong seismic signal-attenuating properties. We designed a special processing workflow with a signal-matching procedure that allows reliable estimation of polarization angles for low-quality data. Additionally, we showed that P-wave-only inversion for the estimation of local anisotropy parameters can be used as valuable additional input for detailed interpretation of geological media, even if anisotropy is relatively low.

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VSP polarization angles determination: Wysin-1 processing case study

Cited by 4 publications

References 14 publications

Some statistical consideration of azimuth and inclination angles determination based on walk - away VSP data in Python

Some statistical consideration of azimuth and inclination angles determination based on walk - away VSP data in Python

The use of S-guided CREP methodology for advanced seismic structure enhancing processing

P-Wave-Only Inversion of Challenging Walkaway VSP Data for Detailed Estimation of Local Anisotropy and Reservoir Parameters: A Case Study of Seismic Processing in Northern Poland

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