81st EAGE Conference and Exhibition 2019最新文献_第8页

Using Carpet Geometries in Simultaneous Source Acquisition 地毯几何在同步源采集中的应用

81st EAGE Conference and Exhibition 2019 Pub Date : 2019-06-03 DOI: 10.3997/2214-4609.201901405

J. Naranjo, D. Dieulangard, M. Pfister

{"title":"Using Carpet Geometries in Simultaneous Source Acquisition","authors":"J. Naranjo, D. Dieulangard, M. Pfister","doi":"10.3997/2214-4609.201901405","DOIUrl":"https://doi.org/10.3997/2214-4609.201901405","url":null,"abstract":"Summary Carpet geometries, or equal spacing of either source or receiver positions in inline and crossline directions (e.g., 50 x 50 m) are often used in simultaneous source acquisition. By using carpet geometries, trace densities of simultaneous source data sets have increased to several million traces per sq km. In practice, however, carpets are never fully acquired in the field due to the presence of natural and man-made obstructions or environmental conditions of the survey area. Further, carpet geometries are not applicable for use in all areas when considering urban, steep mountainous terrains and forested areas. To date, carpet geometries have been used in areas of open access with surface sources, such as vibroseis on land and in marine environments, primarily for ocean bottom sensor surveys and 3D VSPs. Applying this geometry in the field requires different approaches to traditional methods. Focusing field operations on high survey efficiency to balance source and receiver movement while maximizing the trace density that can be acquired amidst obstacles has produced the best results. This paper focuses on operational aspects of applying the carpet acquisition geometries with a discussion on future uses including conceivable carpet receiver geometries.","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90050484","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

Random Noise Attenuation Using Deep Convolutional Autoencoder 基于深度卷积自编码器的随机噪声衰减

81st EAGE Conference and Exhibition 2019 Pub Date : 2019-06-03 DOI: 10.3997/2214-4609.201900852

M. Zhang, Y. Liu, M. Bai, Y. Chen, Y. Zhang

引用次数: 1

How Did the Baltic Basin Source Rocks Become the Shale Gas Exploration Targets in Poland? 波罗的海盆地烃源岩如何成为波兰页岩气勘探目标?

81st EAGE Conference and Exhibition 2019 Pub Date : 2019-06-03 DOI: 10.3997/2214-4609.201901335

M. Janas, T. Podhalańska, A. Głuszyński, J. Roszkowska-Remin, R. Pachytel

引用次数: 0

Late Jurassic Syn-Rift Turbidite Fairways in the Northern Viking Graben – From Seismic to Reservoir Scale 北维京地堑晚侏罗世同裂谷浊积岩通道——从地震到储层尺度

81st EAGE Conference and Exhibition 2019 Pub Date : 2019-06-03 DOI: 10.3997/2214-4609.201901253

T. Dreyer, F. Tillmans, R. Gawthorpe

引用次数: 0

Correcting for Short-Wavelength Statics with Low Rank Approximation 短波静校正的低秩逼近

81st EAGE Conference and Exhibition 2019 Pub Date : 2019-06-03 DOI: 10.3997/2214-4609.201901205

A. Alfaraj, M. Almubarak, F. Herrmann

引用次数: 2

Elastic Gaussian Beam Migration for 4C Ocean Bottom Seismic Data 4C海底地震资料弹性高斯波束偏移

81st EAGE Conference and Exhibition 2019 Pub Date : 2019-06-03 DOI: 10.3997/2214-4609.201901049

X. Shi, W. Mao

引用次数: 0

Challenges in Velocity-Model Building With 3D P-Cable Data 用三维p -电缆数据建立速度模型的挑战

81st EAGE Conference and Exhibition 2019 Pub Date : 2019-06-03 DOI: 10.3997/2214-4609.201901206

M. Gloeckner, J. Walda, D. Gajewski, T. Roth, C. Berndt, Dirk Klaeschen

引用次数: 2

A Robust Q Estimation Scheme Based on an Improved Centroid-Frequency Shift Method for Strongly Attenuating Media 一种基于改进质心移频法的强衰减介质鲁棒Q估计方案

81st EAGE Conference and Exhibition 2019 Pub Date : 2019-06-03 DOI: 10.3997/2214-4609.201901364

H. Li, S. Greenhalgh, B. Zhang, X. Liu

引用次数: 0

Image-Domain Least-Squares Migration and Depth-Domain Inversion for Subsalt Sand Reservoirs 盐下砂储层图像域最小二乘偏移与深度域反演

81st EAGE Conference and Exhibition 2019 Pub Date : 2019-06-03 DOI: 10.3997/2214-4609.201901185

L. Leon, M. Hegazy, O. Zdraveva, M. Majdoub, Charles Inyang, K. Hargrove, K. Pasch, John Hollins

{"title":"Image-Domain Least-Squares Migration and Depth-Domain Inversion for Subsalt Sand Reservoirs","authors":"L. Leon, M. Hegazy, O. Zdraveva, M. Majdoub, Charles Inyang, K. Hargrove, K. Pasch, John Hollins","doi":"10.3997/2214-4609.201901185","DOIUrl":"https://doi.org/10.3997/2214-4609.201901185","url":null,"abstract":"Summary A combination of complex geology and limitations imposed by the surface seismic acquisition geometry results in seismic images contaminated by variabilities in wave propagation effects such as illumination. Consequently, imprints of variable illumination compromise the reliability of the amplitude and phase within the seismic image. Additionally, today's conventional methods of amplitude inversion assume that the seismic amplitudes are representative of the earth's acoustic and elastic properties and do not compensate for variable illumination effects. We present a subsalt case study from the Gulf of Mexico demonstrating least-squares migration in the image domain with point-spread functions (PSF) ability to simultaneously correct for illumination effects and produce a higher-resolution image of thin sand beds located in close proximity to base of salt. We discuss our approach for mitigating scattering effects present in the PSFs arising from high-contrast impedance boundaries within the earth model. Finally, we show the results from a poststack depth-domain inversion, providing true amplitude images and acoustic impedance volumes and allowing reliable assessment of the viability of previously identified drilling targets and enabling corresponding augmentation of prospect interpretation.","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"92 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83356219","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

1D Elastic Full-Waveform Inversion Through a Reversible Jump MCMC Algorithm 基于可逆跳跃MCMC算法的一维弹性全波形反演

81st EAGE Conference and Exhibition 2019 Pub Date : 2019-06-03 DOI: 10.3997/2214-4609.201901339

M. Aleardi, A. Salusti

{"title":"1D Elastic Full-Waveform Inversion Through a Reversible Jump MCMC Algorithm","authors":"M. Aleardi, A. Salusti","doi":"10.3997/2214-4609.201901339","DOIUrl":"https://doi.org/10.3997/2214-4609.201901339","url":null,"abstract":"Summary We implement a transdimensional Bayesian approach to solve the 1D elastic full-waveform inversion (FWI) in which the reflectivity algorithm constitutes the forward modelling. In this approach the number of model parameters (i.e. the number of layers) is treated as an unknown, and a reversible jump Markov Chain Monte Carlo algorithm is used to sample the variable-dimension model space. We also treat the noise standard deviation as an unknown parameter to be solved for, thus letting the algorithm infer the appropriate level of data-fitting. A Parallel tempering strategy and a delayed rejection updating scheme are used to improve the efficiency of the probabilistic sampling. We focus the attention to synthetic data inversions, with the aim to draw general conclusions about the suitability of our approach for pre-stack inversion of reflection seismic data. Our tests prove that the implemented inversion algorithm provides a parsimonious solution and successfully estimates model uncertainty, noise level, model dimensionality and elastic parameters. Our experiments also demonstrate that there is a trade-off between property uncertainty and location uncertainty: A strong elastic contrast determines high uncertainty in the model property values, but low uncertainty in the location of the elastic discontinuity.","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83493490","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