SEG Technical Program Expanded Abstracts 2018最新文献_第8页

Reverse time migration with combined source-receiver illumination 结合源接收机照明的反向时移

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2997690.1

Hao Yang, Wenge Liu, Feng Xu, Fan Wang

引用次数: 1

Mudline to Moho: Imaging from the seafloor to the Moho discontinuity offshore Argentina 泥线到莫霍:从海底到阿根廷近海莫霍不连续性的成像

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2997392.1

Oscar Ramirez, Genmeng Chen, M. Saunders, L. Geiger, M. Cvetković, Mark Roberts, R. Clarke

引用次数: 0

Imaging of radioactive-waste repository with vertically transversely isotropic full-waveform inversion 放射性废物处置库垂直横向各向同性全波形反演成像

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2995460.1

E. Manukyan, H. Maurer

引用次数: 2

Predicted and observed shear on preexisting faults during hydraulic fracture stimulation 在水力压裂增产过程中预测和观察断层剪切

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2991018.1

M. Zoback, Jens-Erik Lund Snee

{"title":"Predicted and observed shear on preexisting faults during hydraulic fracture stimulation","authors":"M. Zoback, Jens-Erik Lund Snee","doi":"10.1190/SEGAM2018-2991018.1","DOIUrl":"https://doi.org/10.1190/SEGAM2018-2991018.1","url":null,"abstract":"Multi-stage hydraulic fracturing increases production from extremely low-permeability unconventional reservoirs by simultaneously inducing slip on pre-existing fracture planes. Here we illustrate how the high pore pressure generated during hydraulic fracturing operations induces slip on preexisting fractures and faults with a wide range of orientations, thus creating an interconnected permeable fracture network. We demonstrate the basic principles of stimulating slip on poorly oriented faults using the stress state for a horizontal well in the Barnett Shale where fracture orientation data are also available from an image log. We compare this analysis with independent fracture orientation data obtained from earthquake focal plane mechanisms. Using the stress data, we are able to determine which nodal plane slipped in each microseismic event. As the two analyses yield essentially identical results, they show the basic processes by which slip on planes of varied orientations occurs during hydraulic stimulation. We extend this analysis to address some misconceptions about the likelihood of slip on horizontal bedding planes and planes parallel and perpendicular to horizontal principal stress directions. Notably, we show that inducing slip on horizontal or sub-horizontal bedding planes is nearly impossible except in compressive (reverse to strike-slip/reverse) stress states (SHmax ≥ Shmin ≈ SV) or when ambient pore pressure is extremely high. The latter case results in very small differences in the magnitudes of the three principal stresses, regardless of the regional stress state.","PeriodicalId":158800,"journal":{"name":"SEG Technical Program Expanded Abstracts 2018","volume":"59 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":"129980697","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: 19

On the zero-level curves and surfaces in potential fields 在势场的零水平曲线和曲面上

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2997991.1

Yaoguo Li

引用次数: 2

Time-lapse waveform inversion regularized by spectral constraints and Sobolev space norm 利用谱约束和Sobolev空间范数正则化时移波形反演

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-W12-04.1

V. Kazei, T. Alkhalifah

{"title":"Time-lapse waveform inversion regularized by spectral constraints and Sobolev space norm","authors":"V. Kazei, T. Alkhalifah","doi":"10.1190/SEGAM2018-W12-04.1","DOIUrl":"https://doi.org/10.1190/SEGAM2018-W12-04.1","url":null,"abstract":"SUMMARY Imperfect illumination from surface seismic data due to lack of aperture and frequency content leads to ambiguity and resolution loss in seismic images and in full-waveform inversion (FWI) results. The resolution of time-lapse velocity updates can, however, be improved enforcing the sparsity of the parameter changes. Edge-preserving regularizations and constraints are typically used to promote sparsity. However, different choice of regularization parameters leads to different inversion results and optimal parameters are hard to identify, especially for real data. In particular it is not straightforward to balance the inversion between sparsity constraint and data ﬁt. Fortunately, it is possible to estimate local spatial wavenum-bers in a velocity model that are best illuminated by the data. We propose to constrain part of the model difference spectrum that is well illuminated by the data and optimize the rest of the spectrum to enhance sparsity. We approximate correctly retrieved model wavenumbers by simply picking large enough values in the inverted spectrum and constrain that part of model spectrum. Then we adjust the rest of the wavenumbers to reduce the value of a Sobolev space norm (SSN). SSN reduction promotes sparsity of time-lapse updates, while spectral constraints ensure that the part of the modeled spectrum retrieved from the data is completely retained. Application to synthetic noisy data for a perturbation of the Marmousi II model shows that the model resolution can be improved by using our method to extrapolate the model spectrum.","PeriodicalId":158800,"journal":{"name":"SEG Technical Program Expanded Abstracts 2018","volume":"2 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":"130063753","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: 6

2D/3D Kirchhoff-based wavefield continuation 2D/3D kirchhoff波场延拓

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2998625.1

A. Barone, A. Vassiliou

引用次数: 0

First-break automatic picking with deep semisupervised learning neural network 基于深度半监督学习神经网络的首破自动拾取

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2998106.1

Kuo Chun Tsai, Wenyi Hu, Xuqing Wu, Jiefu Chen, Zhu Han

引用次数: 25

Calibration, inversion, and applications of multiconfiguration electromagnetic induction for agricultural top- and subsoil characterization 农业表层和底土特征的多态电磁感应校正、反演和应用

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2965257.1

J. Kruk, C. Hebel, C. Brogi, M. Kaufmann, Xihe Tan, L. Weihermüller, J. Huisman, H. Vereecken, A. Mester

引用次数: 2

Stochastic inversion of AVO based on an improved MCMC method 基于改进MCMC方法的AVO随机反演

SEG Technical Program Expanded Abstracts 2018 Pub Date : 2018-08-27 DOI: 10.1190/SEGAM2018-2995993.1

Li Wang, Guangzhi Zhang, Xingyao Yin

引用次数: 0