SEG Technical Program Expanded Abstracts 2018最新文献_第3页

Multiscale time-frequency domain full-waveform inversion with a local correlation-phase misfit function 具有局部相关相位失拟函数的多尺度时频域全波形反演

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2997323.1

Yong Hu, Liguo Han, R. Wu, Feng Qiang

引用次数: 1

Depth registration of VSP DAS fiber VSP DAS光纤的深度配准

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2998408.1

A. Gordon, D. Lawton, K. Hall, B. Freifeld, T. Daley, P. Cook

{"title":"Depth registration of VSP DAS fiber","authors":"A. Gordon, D. Lawton, K. Hall, B. Freifeld, T. Daley, P. Cook","doi":"10.1190/SEGAM2018-2998408.1","DOIUrl":"https://doi.org/10.1190/SEGAM2018-2998408.1","url":null,"abstract":"As part of the continuous monitoring program implemented at the CO2 injection site developed by Containment and Monitoring Institute, two Vertical Seismic Profiles (VSP) surveys were acquired at the Field Research Station (FRS) in Newell County, Alberta, Canada. The surveys were recorded with two different receiver types; a 24-level 3C geophone array and an integrated fibre optic cable, both Distributed Acoustic Sensing (DAS) and Distributed Temperature Sensing (DTS). A calibration step is necessary to register the precise depth of the DAS traces acquired with the straight fibre optic cable. This calibration consisted on two approaches; a cross-correlation based method and a time difference analysis between the DAS and geophone data. The cross-correlation results indicate an accurate depth registration of the DAS data with respect to the geophone data. A difference of 1 m was obtained for the straight fibre raw data. While the time difference analysis shows a similar result, a difference of 1.25 m for the straight cable. Furthermore, the DAS data was converted to geophone equivalent values through integration for comparison and a more accurate result was obtained for l the DAS data after the calibration workflow. In addition, a synthetic seismogram was generated and compared with corridor stacks obtained from a zero-offset DAS and geophone data processing.","PeriodicalId":158800,"journal":{"name":"SEG Technical Program Expanded Abstracts 2018","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115204121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Scalar PP and PS imaging of elastic RTM by wavefield decoupling method 基于波场解耦法的弹性RTM标量PP和PS成像

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2995359.1

Xiyan Zhou, X. Chang, Yibo Wang, Z. Yao

引用次数: 2

Image-guided wavefield tomography for VTI media VTI介质的成像引导波场层析成像

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2996404.1

V. Li, A. Guitton, I. Tsvankin, T. Alkhalifah

{"title":"Image-guided wavefield tomography for VTI media","authors":"V. Li, A. Guitton, I. Tsvankin, T. Alkhalifah","doi":"10.1190/SEGAM2018-2996404.1","DOIUrl":"https://doi.org/10.1190/SEGAM2018-2996404.1","url":null,"abstract":"Processing algorithms for transversely isotropic (TI) media are widely used in depth imaging and typically bring substantial improvements in reflector focusing and positioning. Here, we develop acoustic image-domain tomography (IDT) for reconstructing VTI (TI with a vertical symmetry axis) models from P-wave reflection data. The modeling operator yields an integral wave-equation solution, which is based on a separable dispersion relation and contains only P-waves. The zero-dip NMO velocity (Vnmo) and anellipticity parameter η are updated by focusing energy in space-lag images obtained by least-squares reverse time migration (LSRTM). Application of LSRTM helps suppress apertureand illumination-induced artifacts in space-lag gathers and improve the robustness of η-estimation. The trade-off between Vnmo and η is mitigated by a three-stage inversion algorithm that gradually relaxes the constraints on the spatial variation of η. Assuming that the depth profile of the Thomsen parameter δ is known at two or more borehole locations, we employ image-guided interpolation to constrain the depth scale of the parameter fields and the migrated image. Image-guided smoothing is also applied to the IDT gradients to facilitate convergence towards geologically plausible models. The algorithm is tested on synthetic reflection and borehole data from the structurally complicated elastic VTI Marmousi-II model. Although the initial velocity field is purely isotropic and substantially distorted, all three relevant parameters (Vnmo, η, and δ) are estimated with sufficient accuracy. The algorithm is also applied to a line from a 3D ocean-bottom-node data set acquired in the Gulf of Mexico.","PeriodicalId":158800,"journal":{"name":"SEG Technical Program Expanded Abstracts 2018","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116011206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of aperture on Marchenko focusing functions and their radiation direction 孔径对马尔琴科聚焦函数及其辐射方向的影响

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2992278.1

Y. Sripanich, I. Vasconcelos

引用次数: 1

Interpretation of Cole-Cole parameters derived from helicopter TDEM data: Case studies 直升机TDEM数据中Cole-Cole参数的解释:案例研究

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2996245.1

K. Kwan, J. Legault, A. Prikhodko, G. Plastow, Ian Johnson

引用次数: 3

Research on seismic-fluid detection driven by rock physics: A case study in Bohai Bay 岩石物理驱动下的地震流体探测研究——以渤海湾地区为例

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2996775.1

Yao Li, Wei Gao, X. Duan, H. Tan

引用次数: 0

Fractal characterization of northwestern Venezuela gravity station network 委内瑞拉西北部重力站网的分形特征

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2996592.1

Carianna Herrera, J. Sánchez-Rojas, M. Aldana

引用次数: 0

Three-dimensional sparse seismic deconvolution based on Q attenuation model 基于Q衰减模型的三维稀疏地震反褶积

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2997107.1

Deborah Pereg, I. Cohen, A. Vassiliou

引用次数: 0

How to calculate sweetness accurately: Theoretical analysis and case study 如何准确计算甜度:理论分析与案例研究

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2995864.1

Z. Junhua, Liu Yang, Lin Chengyan, Du Yushan, Liu Lei

引用次数: 1