A cone penetration test (CPT) is the most common geotechnical testing method used to estimate in situ strength properties of soil. Although CPT provides valuable information, this information restricted location measurement. We propose a new concept integrate shallow S‐wave reflection seismic data with order obtain laterally continuous subsoil information. In vein, valid quantitative means relate reflections primary requirement. The approach proposed here based on characterization scaling...

Abstract We present a new method for determining the azimuthal variation of ambient noise sources, which combines computational speed and simplicity traditional approaches with rigor waveform‐inversion‐based to source estimation. This is based on previously developed theoretical framework sensitivity kernels cross‐correlation amplitudes. It performs tomographic inversion sources Earth's surface suitable small‐ (local‐) scale studies. apply passive seismic data acquired in an exploration...

Given a 3D heterogeneous velocity model with few million voxels, fast generation of accurate seismic responses at specified receiver positions from known microseismic event locations is well-known challenge in geophysics, since it typically involves numerical solution the computationally expensive elastic wave equation. Thousands such forward simulations are often routine requirement for parameter estimation microseimsic events via suitable source inversion process. Parameter based on...

Crosswell traveltime tomography is a common technique in the oil industry for determining velocity function plane between two boreholes. However, method suffers from well‐known problem that lateral resolution far less than vertical because of unfavorable illumination conditions survey geometries comprising wells. Consequently, it very difficult to image sudden changes accurately using this technique. We propose such changes, which severely constrains solution space by inverting position...

We present a new method for determining the azimuthal variation of ambient seismic noise sources, that combines computational speed and simplicity traditional approaches with rigour waveform-inversion-based to noise-source estimation. This is based on previously developed theoretical framework sensitivity kernels cross-correlation amplitudes. It performs tomographic inversion sources Earths surface suitable small (local) scale studies. apply passive data acquired in an exploration context,...

The relation between the angle‐dependent reflectivity of an interface in a target zone and amplitude‐variation‐with‐offset (AVO) effects observed seismic data at earth's surface is complicated by many factors, as was pointed out Ostrander's classic paper (Geophysics, 1984). Some factors are "reflection related" (such thin‐bed tuning, reflector curvature), others "propagation geometrical spreading, transmission and/or anelastic losses), or "acquisition source/receiver directivity, geophone...

Abstract In passive seismic and microseismic monitoring, identifying characterizing events in a strong noisy background is challenging task. Most of the established methods for geophysical inversion are likely to yield many false event detections. The most advanced these schemes require thousands computationally demanding forward elastic-wave propagation simulations. Here we train use an ensemble Gaussian process surrogate meta-models, or proxy emulators, accelerate generation accurate...

The Bittern field has performed exceptionally well since first oil in 2000, but a crestal producer experienced unexpected water breakthrough 2006. Subsequently, results from production logging campaign have confirmed the presence of injected hi

Abstract A new seismic and quantitative reinterpretation was carried out for a brownfield in Western Desert, Egypt to improve depth predictability, de-risk appraisal well locations better understand producer-injector connectivity. The study field is located the Onshore comprises of Upper Cretaceous tidal channel systems across four key reservoir levels where sand thicknesses range from 2 15 m. discovered 1993 but development drilling only commenced 2008. last integrated performed 2012....

PreviousNext No AccessSEG Technical Program Expanded Abstracts 1997Resolving well‐log singularities from seismic dataAuthors: J. C. M. GoudswaardC. P. A. WapenaarJ. GoudswaardCentre for Geoscience, Laboratory of Seismics and Acoustics, Delft University Technology WapenaarCentre Technologyhttps://doi.org/10.1190/1.1885702 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Permalink:...

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2000Relating shallow, S‐wave seismic to cone penetration testing (CPT) in soft soil: A multi‐angle, multi‐scale approachAuthors: Ranajit GhoseJeroen GoudswaardRanajit GhoseDelft University of Technology, The Netherlands and Jeroen GoudswaardDelft Netherlandshttps://doi.org/10.1190/1.1815643 SectionsAboutPDF/ePub ToolsAdd favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Permalink:...

PreviousNext No AccessSEG Technical Program Expanded Abstracts 1998Characterization of reflectors by multi‐scale amplitude and phase analysis seismic dataAuthors: Jeroen GoudswaardKees WapenaarJeroen GoudswaardCentre for Geoscience, Laboratory Seismics Acoustics, Delft University Technology Kees WapenaarCentre Technologyhttps://doi.org/10.1190/1.1820249 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Permalink:...

We propose an alternative parameterization of seismic reflectors in the subsurface, terms self-similar singularities, which are generalizations stepfunctions. This captures multi-scale behavior real sonic P-wave velocity logs, as can be derived by performing modulus maxima analysis on wavelet-transformed well-logs. Results synthetic reflection data, modeled well-logs, show that a singularity parameter retrieved, is consistent with directly from well-log.

Abstract The study area is located in the Carnarvon Basin, offshore Western Australia. paper discusses an approach for predicting lateral variation of Net-to-Gross using 3D probabilistic seismic inversion. goal to define and understand distribution sands shales on basis reflection data. This modelling inversion supported by good quality amplitude patterns indicate hydrocarbon presence properties like Net-to-Gross. Qualitative CtL ("Check Loop") used highlight mismatches between forward...

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2000Multiangle processing and multiscale characterization of walkaway VSP dataAuthors: Jeroen GoudswaardMenno DillenKees WapenaarJeroen GoudswaardCentre for Geoscience, Laboratory Seismics Acoustics, Delft University Technology, Menno DillenCentre Kees WapenaarCentre Technologyhttps://doi.org/10.1190/1.1815771 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked...

The role of Geophysics in the planning and drillings phases a well is diverse, varying with challenges any given well. objective this paper case study highlighting how contributed both phases, including input stemming from recognition hazards whilst drilling, to successful outcome difficult Southern North Sea. well, initially stalled due economics, was re-activated as result new depth conversion insights using PSDM velocity modelling; its trajectory designed modified address interpreted on...

PreviousNext No AccessSEG Technical Program Expanded Abstracts 1999Multi‐angle, multi‐scale inversion of migrated seismic data: An overviewAuthors: Kees WapenaarAart‐Jan van WijngaardenJeroen GoudswaardKees WapenaarDelft Univ. Techn., Aart‐Jan WijngaardenNorsk Hydro, and Jeroen GoudswaardDelft Univ.https://doi.org/10.1190/1.1820817 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Permalink:...

A class of vision problems, less commonly studied, consists detecting objects in imagery obtained from physics-based experiments. These can span 4D (x, y, z, t) and are visible as disturbances (caused due to physical phenomena) the image with background distribution being approximately uniform. Such objects, occasionally referred `events', be considered high energy blobs image. Unlike images analyzed conventional very limited features associated such events, their shape, size count vary...

Summary Detecting and imaging microseismic activity can be a powerful tool for reservoir monitoring, it help in detecting quantifying regional tectonic production related stress buildup. However, identifying activities from individual traces/raw data is not an easy task because of their low signal-to-noise ratio. Also, the presence numerous event locations (for example during water injection or hydraulic fracturing) lead to erroneous identification spurious noise as event. In order enhance...

Abstract Normal Move-Out (NMO) velocity pick editing is the segregation of good and bad picks from an unsupervised auto-picking algorithm. As not all these are correct, manual required. This time consuming, repetitive typically requires a seismic expert for days to weeks. Automating it would require algorithm that mimics domain knowledge expertise processor; deterministic approach therefore likely fail. Alternatively, we propose machine learning identify valid time-velocity picks. The...

Over the years, travel-time inversion (TTI) has established itself within Shell as preferred method to construct 3-D velocity models in depth for subsequent imaging purposes. Vast experience been built up with layer based TTI and more recently its use gridded or hybrid taken off. TT1 developed geologies which a layer-based description is less appropriate. In this presentation we present number of case studies demonstrating value TII.