Seg Technical Program Expanded Abstracts最新文献_第5页

Seismic-reservoir characterization based on random forest and fuzzy logic algorithms 基于随机森林和模糊逻辑算法的地震储层表征

Seg Technical Program Expanded Abstracts Pub Date : 2020-09-30 DOI: 10.1190/SEGAM2020-3426135.1

W. Geng, Xiaohong Chen, Jianhua Wang, Jingye Li, Jian Zhang, Wei Tang, Shuying Wei

引用次数: 0

Analysis and application of data-driven approaches for internal-multiple elimination 数据驱动内多重消除方法的分析与应用

Seg Technical Program Expanded Abstracts Pub Date : 2020-09-30 DOI: 10.1190/SEGAM2020-3427692.1

Chao Ma, M. Guo, Zhaojun Liu, J. Sheng

引用次数: 1

The preconditioned ARD-based AVA inversion method for P-impedance and S-impedance 基于预条件ard的p阻抗和s阻抗AVA反演方法

Seg Technical Program Expanded Abstracts Pub Date : 2020-09-30 DOI: 10.1190/SEGAM2020-3415458.1

Yongzhen Ji, Huafeng Hu, Zhengliang Lin, Kefei Zhang, Han Zhong

引用次数: 0

Time-lapse Q-factor tomography by reflected waves’ inversion 反射波反演延时q因子层析成像

Seg Technical Program Expanded Abstracts Pub Date : 2020-09-30 DOI: 10.1190/SEGAM2020-3426706.1

A. Vesnaver, G. Böhm, P. Cance, J. Carcione, D. Gei, J. Ba

引用次数: 0

A reflection-based efficient wavefield inversion to retrieve a good initial background velocity 一种基于反射的有效波场反演，以检索良好的初始背景速度

Seg Technical Program Expanded Abstracts Pub Date : 2020-09-30 DOI: 10.1190/SEGAM2020-3421450.1

Chao Song, T. Alkhalifah

{"title":"A reflection-based efficient wavefield inversion to retrieve a good initial background velocity","authors":"Chao Song, T. Alkhalifah","doi":"10.1190/SEGAM2020-3421450.1","DOIUrl":"https://doi.org/10.1190/SEGAM2020-3421450.1","url":null,"abstract":"Full-waveform inversion (FWI) requires either a good initial velocity model or low-frequency data to mitigate the cycleskipping issue. Reflection-waveform inversion (RWI) uses a migration/demigration process to retrieve a background model that can be used as a good initial velocity in FWI. The drawback of the conventional RWI is that it requires the use of a least-squares migration, which is often computationally expensive. Efficient wavefield inversion (EWI) is a recently developed method from wavefield reconstruction inversion (WRI). EWI uses a modified source function to introduce the multiscattering components in the reconstructed wavefield. However, when the initial velocity is far from the true one, the wavefield can not be accurately reconstructed. We incorporate the RWI formulation into EWI by inverting for the Born scattered wavefield instead of the wavefield itself. In this case, we use the perturbation related to secondary sources as a modified source function. As the sources in the reflection-based EWI (REWI) are located in the subsurface, we are able to update the background model along the reflection wave path. We calculate the background model perturbation by a deconvolution process in each frequency like what is done in the original EWI. We demonstrate the validity of the proposed approach using synthetic data generated for the Marmousi model.","PeriodicalId":117371,"journal":{"name":"Seg Technical Program Expanded Abstracts","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122258863","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: 1

Application of HTI anisotropy correction for wide-azimuth seismic data: A case study of tight gas exploration in Sichuan Basin, China HTI各向异性校正在宽方位角地震资料中的应用——以四川盆地致密气勘探为例

Seg Technical Program Expanded Abstracts Pub Date : 2020-09-30 DOI: 10.1190/SEGAM2020-3427291.1

Q. Su, H. Zeng, H. Meng, S. Qie, Xiaomei Zhang, Huan Liu

引用次数: 2

High-resolution velocity model estimation by the RTH method 基于RTH方法的高分辨率速度模型估计

Seg Technical Program Expanded Abstracts Pub Date : 2020-09-30 DOI: 10.1190/SEGAM2020-3410422.1

G. Erokhin, Vitaliy M. Bryksin

引用次数: 1

Improving TOC estimation for Wolfcamp shales using statistical shale rock physics modeling 利用统计页岩物理建模改进Wolfcamp页岩TOC估算

Seg Technical Program Expanded Abstracts Pub Date : 2020-09-30 DOI: 10.1190/SEGAM2020-3419221.1

Jaewook Lee, D. Lumley, Un Young Lim

引用次数: 2

Bedrock detection based on seismic interferometry using ambient noise in Singapore 新加坡基于环境噪声的地震干涉测量基岩探测

Seg Technical Program Expanded Abstracts Pub Date : 2020-09-30 DOI: 10.1190/SEGAM2020-3427558.1

E. Nilot, Y. Li, K. Lythgoe

{"title":"Bedrock detection based on seismic interferometry using ambient noise in Singapore","authors":"E. Nilot, Y. Li, K. Lythgoe","doi":"10.1190/SEGAM2020-3427558.1","DOIUrl":"https://doi.org/10.1190/SEGAM2020-3427558.1","url":null,"abstract":"The city-state of Singapore principally sits on granite bedrock known as the Bukit Timah formation. The Bukit Timah granite outcrops in the centre of Singapore, but it is buried below quaternary sediments known as the Old Alluvium formation in the east and north. Bedrock depth and faults in the shallow surface influence the stability of structures built above it, while the depth to bedrock constrains the water storage capacity and sub-soil water movement. Seismic methods are needed to image bedrock depth, however explosive methods are forbidden in the densely populated urban environment of Singapore. Passive seismic based on seismic interferometry is nondestructive and can provide us estimated detection depth. We apply the passive surface wave method based on seismic interferometry to the whole of Singapore island using a 1 month deployment of short-period nodes, to obtain the 3D velocity structure. We also obtain more detailed information in the Old Alluvium sediments by applying the MASW (multi-channel analysis of surface waves) method to linear geophone arrays. By analyzing the results from both tomography and MASW, we show that the granite bedrock beneath the Old Alluvium sediments is deeper than existing geological model suggests, which potentially increases the storage volume for fresh water in the deep underground acquifer.","PeriodicalId":117371,"journal":{"name":"Seg Technical Program Expanded Abstracts","volume":"239 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132379225","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

Use of computational topology to quantify changes in pore space due to chemical dissolution of core matrix: A numerical study 利用计算拓扑来量化由于岩心基质化学溶解引起的孔隙空间变化:一项数值研究

Seg Technical Program Expanded Abstracts Pub Date : 2020-09-30 DOI: 10.1190/SEGAM2020-3424142.1

V. Lisitsa, T. Khachkova, Y. Bazaikin

引用次数: 1