... a continuation approach for au- selective-correlation velocity analysis could be used to improve tomatically picking multidimensional velocity surfaces from the resolution of velocity spectra and lead to more accurate semblance scans to avoid local minima. The method functions picks. Development has continued...

... The presence of internal multiple reflections reduces the accuracy and quality of the results obtained in many stages of seismic processing, e.g., velocity analysis, stacking and time/depth migration. A novel scheme called Marchenko multiple elimination (MME) has recently shown impressive...

... and interpretation methods based on isotropy are no longer suitable for wide-azimuth seismic data with anisotropy. In this paper, an automatic residual anisotropic velocity analysis technique is used to process wide-azimuth seismic data. Considering the effect of anisotropy on the velocity, which could be estimated...

... transform seg international exposition iterative inversion equation velocity transform algorithm operator reservoir characterization upstream oil & gas reflection hessian cmp gather exploration geophysicist 10 velocity analysis primary reflection Separating primaries and multiples using...

... ABSTRACT We compare two iterative approaches for depth-migration velocity analysis by image-wave continuation in CIGs. One implementation aims at updating the whole model in each iteration, whereas the other updates it one layer at a time, from top to bottom. Previous investigations found...

... processing techniques and successful workflow. Presentation Date: Monday, September 16, 2019 Session Start Time: 1:50 PM Presentation Start Time: 4:20 PM Location: 214D Presentation Type: Oral correction velocity analysis streamer processing technique acquisition system japan seg...

... ABSTRACT Wave equation migration velocity analysis (WEMVA) is an image domain technique to recover the large-scale structure of the subsurface velocity model. The objective functions are posed directly to improve the quality of the image. However, due to the limited surface acquisition...

... Alkhalifah , T. , 2013 , Prestack wavefield approximations : Geophysics , 78 , no . 5 , T141 – T149 , doi 10.1190/geo2012-0532.1 . Biondi , B. , and P. , Sava , 1999 , Wave-equation migration velocity analysis : 69th Annual International Meeting, SEG...

... reservoir characterization semblance upstream oil & gas variance migration velocity diffraction image seismic diffraction imaging partial image annual international meeting fomel seismic image weight function seg international exposition velocity analysis diffraction...

... upstream oil & gas only yolo model velocity analysis artificial intelligence yolo model automatic velocity neural network geophysics seismic data manual picking deep learning picking yolo-lstm model seg international exposition energy heap annual international meeting machine learning...

... ABSTRACT Seismic anisotropy is present in different geological settings at various scales. This significantly affects the standard hyperbolic reflection moveout approximation that is based on the assumption that layers are isotropic. Conventional traveltime picking and velocity analysis...

... reservoir characterization automatic velocity centroid algorithm annual meeting k-mean algorithm velocity analysis Ester , M. , H.-P. , Kriegel , J. , Sander , and X. , Xu , 1996 , A density-based algorithm for discovering clusters in large spatial databases...

... ABSTRACT Full subsurface extended image volumes (EIVs) contain abundant information such as subsurface image gathers used in imaging, interpretation of rock properties or velocity analysis, but are expensive in term of computational cost and storage requirement due to their large size. Yet...

... seg international exposition acquisition structural imaging gabriel madero reflection seismic variance geometry bhp summary velocity analysis alteration copper mine image structural feature metals & mining vsp data References References Edwards , R. , 1986 , Ore...

... ABSTRACT Common-Image Gathers (CIGs) can be used for migration velocity analysis to update the velocity model and extracting the information of amplitude variation with offset or angle analysis. In addition, the high-quality stacking profile obtained by stacking the CIGs can be used...

... be further interpreted to describe fractured reservoirs or regional stress regimes. Residual velocity error on the other hand can be used to perform velocity analysis or quantify depth mispositioning. In this paper, we present a method that is robust to noise and can simultaneously extract the moveout...

... ABSTRACT We show how vertical downhole distributed acoustic sensing arrays can be used for P- and S- velocity analysis along the array. Using such velocity models, the array can be used in an effective moveout-based earthquake detection approach. We demonstrate both applications on 20 days...

..., October 17, 2018 Start Time: 9:20:00 AM Location: Poster Station 1 Presentation Type: Poster recurrent neural network upstream oil & gas artificial intelligence machine learning neural network annual meeting hyperbola velocity analysis recurrent network seg international exposition...

... in regional 2D seismic marine programs describing how we incorporate interpretation and non-seismic data early on in the workflow to constrain the seismic velocity models and aid further automatic velocity analysis. Examples shown are from large scale 2D projects in the deep waters offshore Brazil, Santos...

... reflection section velocity analysis migration deconvolution migration workflow seg international exposition demigration reservoir characterization geophysics zero-offset section schuster gom data seismic data yilmaz kirchhoff migration velocity model zero-offset reflection...