82nd EAGE Annual Conference & Exhibition最新文献_第10页

4D Time-Lapse Full Waveform Inversion Case Study for SAGD Steam Chamber Imaging SAGD蒸汽室成像4D延时全波形反演案例研究

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202113199

H. Feng, T. Kay, A. Knudsen, W. Wang, A. Ayre

引用次数: 0

Combining Edge Enhancement Images for More Reliable Detection of Magnetic Features: A Python implementation 结合边缘增强图像以实现更可靠的磁特征检测:Python实现

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202010822

V. B. Ribeiro, J. Markov

{"title":"Combining Edge Enhancement Images for More Reliable Detection of Magnetic Features: A Python implementation","authors":"V. B. Ribeiro, J. Markov","doi":"10.3997/2214-4609.202010822","DOIUrl":"https://doi.org/10.3997/2214-4609.202010822","url":null,"abstract":"Summary The most common use of aeromagnetic data is the identification of magnetic bodies and contacts. Edge enhancement techniques are crucial to the interpretation process because they allow more accurate mapping of these key features. However, most techniques used to enhance magnetic features have disadvantages of one type or another. The algorithm presented here allows the user to apply any combination of fourteen different enhancement filter techniques. This strategy has the advantage of letting the interpreter to compare the noise-to-signal ratio obtained for different methods and chose only the better results for a specific study case. We also included two different options to combine the results: a simple stacking approach where all filters considered have the same weight to compose the final map and one that divides the solutions in four different groups, according with the number of results obtained. By stacking the solutions obtained by different filters it is possible to enhance true edges while minimizing false peaks and mathematical artefacts. The method was tested on a synthetic data set and one real case to demonstrate the methods performance. The synthetic case was designed to simulate the presence of three sources at different depths with a strong unknown remanent component.","PeriodicalId":265130,"journal":{"name":"82nd EAGE Annual Conference & Exhibition","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127356004","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

Utilizing near-field hydrophone data for high-resolution shallow hazard imaging 利用近场水听器数据进行高分辨率浅层危险成像

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202112665

C. Tyagi, S. Leake, K. Mistry, C. Olsen, K. Sundøy

{"title":"Utilizing near-field hydrophone data for high-resolution shallow hazard imaging","authors":"C. Tyagi, S. Leake, K. Mistry, C. Olsen, K. Sundøy","doi":"10.3997/2214-4609.202112665","DOIUrl":"https://doi.org/10.3997/2214-4609.202112665","url":null,"abstract":"Summary Shallow hazard imaging of the near surface is a key input to de-risk drilling plans. Exploration-style seismic acquisition inherits the limitations, for example, coarse temporal sampling, lack of small reflection angles, and low-frequency source. Therefore, additional measurements using dedicated high-resolution (HR) site surveys are required, at an extra cost and planning. However, potentially ultra-high-resolution measurements are also recorded in marine towed-streamer exploration-style acquisitions in the form of near-field hydrophone (NFH) measurements, located above the seismic sources. If the NFH recordings can be processed to remove the source signature and preserve the reflection energy, a broadband data set can be created at zero offset from the source with higher resolution in the shallow compared to conventional 3D marine seismic data. The challenges associated with creating such a workflow are: 1) being able to remove the source signature from all the NFH data sets and preserve signal, 2) producing a product that is as reliable and effective at imaging shallow hazards as a dedicated shallow hazard survey, and 3) being able to interpolate sparse crossline measurements. The workflow presented here showcases the solutions for these challenges and illustrates a comparison between the produced data with HR and ultra-HR dedicated images.","PeriodicalId":265130,"journal":{"name":"82nd EAGE Annual Conference & Exhibition","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130844090","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

New processing flow for surface wave dispersion curve inversion of near surface 2-D Vs model 近地表二维Vs模型表面波频散曲线反演新处理流程

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202113133

X. Song, G. Liu

{"title":"New processing flow for surface wave dispersion curve inversion of near surface 2-D Vs model","authors":"X. Song, G. Liu","doi":"10.3997/2214-4609.202113133","DOIUrl":"https://doi.org/10.3997/2214-4609.202113133","url":null,"abstract":"Summary In this paper, a processing flow for estimating the near surface 2-D Vs velocity model using Rayleigh surface wave dispersion curve is established. Rayleigh surface wave dispersion energy diagram is extracted by frequency decomposition method. However, due to the low resolution of the extracted dispersive energy map, the window superposition method is introduced to superimpose the dispersive energy of multiple shot points in the same window on the dispersive energy map in the center of the common window. Then move the window along the direction of the acquisition line to extract the dispersive energy map at different positions. 2-D search is carried out on the periodic grid of phase velocity, and the dispersion points are selected from the superimposed energy peaks. Windowing and stacking can also smooth the lateral changes of the model and improve the signal-to-noise ratio. Then, the singular value decomposition based damped least square method is used to inverse the one-dimensional Vs velocity, and the inverse 1-D Vs velocity is interpolated to obtain the 2-D Vs velocity profile. The simulation data and the actual data of Yellowstone National Park shared by Sylvain pasquet and Ludovic bodet (2017) show the effectiveness of the processing process.","PeriodicalId":265130,"journal":{"name":"82nd EAGE Annual Conference & Exhibition","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131929315","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

Deblending using periodic time delays for hexasource variable depth streamer data 使用周期时间延迟对六源变深度流数据进行解混

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202113172

Y. Ren, S. Drewell, H. Masoomzadeh, S. Baldock, T. Seher, V. Danielsen, P. Dhelie

引用次数: 0

Geological Characterization of the Hydraulically-Connected Bunter Sandstone Formation Saline Aquifer in the Southern North Sea 北海南部水力连接Bunter砂岩组咸水含水层地质特征

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202112950

P. Bridger, J. White, J. Williams, G. Williams, S. Hannis

引用次数: 0

Brittleness prediction and azimuthal AVO analysis in unconventional reservoir for multi stage hydraulic fracturing efficiency improving 非常规储层脆性预测及方位AVO分析提高多级水力压裂效率

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202113158

B. Plotnikov, I. Karimov, R. Volkov, D. Ignatova

引用次数: 0

Assisted Fault Interpretation by Multi-scale Dilated Convolutional Neural Network 多尺度扩展卷积神经网络辅助断层解释

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202112679

F. Jiang, P. Norlund

{"title":"Assisted Fault Interpretation by Multi-scale Dilated Convolutional Neural Network","authors":"F. Jiang, P. Norlund","doi":"10.3997/2214-4609.202112679","DOIUrl":"https://doi.org/10.3997/2214-4609.202112679","url":null,"abstract":"Summary Assisted fault interpretation leveraging machine learning techniques has become a promising way to identify faults in seismic. In geophysical exploration, faults are often considered as a sealing surface which traps hydrocarbons and forms reservoir zones. Thus, correctly identifying fault locations is critical. Fault identification can be treated as a semantic segmentation issue where we classify each seismic pixel into one of a given set of categories, such as fault or non-fault. To be successful we need to combine pixel-level accuracy with global-level feature identification. In this abstract, we propose a novel deep learning network with multi-scale dilated convolution to identify fault locations. It is based on adaptions of a convolutional neural network architecture which has been used for image classification and semantic segmentation. The motivation is that dilated convolution supports exponentially expanding receptive fields without losing resolution or coverage. We implemented multiple dilated convolution layers with variable dilation rates to systematically aggregate multi-scale seismic information. Several tests are shown and demonstrate the improvement of identification accuracy with higher resolution.","PeriodicalId":265130,"journal":{"name":"82nd EAGE Annual Conference & Exhibition","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132280177","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

Effect of the azimuthal fluid channel in a cased borehole on multipole dispersions 套管井中方位流体通道对多极色散的影响

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202113141

K. Kayama, H. Mikada, J. Takekawa, S. Xu

{"title":"Effect of the azimuthal fluid channel in a cased borehole on multipole dispersions","authors":"K. Kayama, H. Mikada, J. Takekawa, S. Xu","doi":"10.3997/2214-4609.202113141","DOIUrl":"https://doi.org/10.3997/2214-4609.202113141","url":null,"abstract":"Summary Fluid channels generated in the annulus of incompletely cemented cased holes are problematic in developing oil, gas, or geothermal resources. The dispersion curves of borehole modes in sonic logging bring additional information on the cement bonding conditions to cement bond logs. Our research investigated the effects of the different central arc angles of a fluid channel in the annulus of a cased borehole on the dispersion curves using numerical experiments. Synthetic 3D numerical models are used to simulate wave propagation. We used a modified matrix pencil algorithm to estimate the dispersion curves both in fast and slow formations. Our results indicated that S-wave velocity measurement by flexural dispersion is stable in all cases in fast formation while only possible in the widest arc angle case in slow formation. The monopole can be utilized to detect large fluid channels. Symmetric flexural in monopole response are useful regardless of the source orientation using monopole source. We notice that the slowness of symmetric flexural is sensitive to the small angle of the fluid channel but not for the large angle case. Moreover, symmetric flexural gives a valuable response to determine fluid layer thickness that is not depending on the fluid position.","PeriodicalId":265130,"journal":{"name":"82nd EAGE Annual Conference & Exhibition","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122232645","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

Optimized acoustic wavefield modelling in transversely isotropic media 横向各向同性介质中优化的声波场建模

82nd EAGE Annual Conference & Exhibition Pub Date : 2021-10-18 DOI: 10.3997/2214-4609.202112997

Y. Nikonenko, M. Charara, M. Spasennykh

{"title":"Optimized acoustic wavefield modelling in transversely isotropic media","authors":"Y. Nikonenko, M. Charara, M. Spasennykh","doi":"10.3997/2214-4609.202112997","DOIUrl":"https://doi.org/10.3997/2214-4609.202112997","url":null,"abstract":"Summary A large number of studies have been published on the topic of acoustic wavefield modeling in anisotropic media. All of them are based on the choice of the suitable wave equation for numerical implementation. However, these wave equations are usually cumbersome, have an unclear physical nature, are computationally demanding, and generate artificial pseudo shear modes, which are considered as artifacts in the seismic imaging process. Duveneck and Bakker (2011) derived a system of coupled differential wave equations based on Hooke’s law and equation of motion only. Despite all the advantages, these equations are unstable for a certain configuration of anisotropic parameters and generate S-wave artifacts. Liu et al. (2009) , on the other hand, derived an unconditionally stable single wave equation that turned out to be difficult to model. Moreover, it is responsible only for the P-wave mode. Nikonenko and Charara (2020) have shown that this single wave equation is just one mode for the Duveneck coupled equations and proposed a possible fully explicit scheme for its solution. We continue this approach making the solution optimal and extending it to other cases of anisotropy. Numerical examples illustrate the absence of artifacts and the accuracy of the proposed method.","PeriodicalId":265130,"journal":{"name":"82nd EAGE Annual Conference & Exhibition","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115754907","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