Vertical Seismic Profiling--Processing and Analysis Case Study: ABSTRACT

James P. Disiena, Bok S. Byun, James E. Fix

AAPG Bulletin

... waves by apparent velocity. Major problems associated with these VSP data are tube wave noise and insufficient depth sampling. Optimum processing...

How to Improve the Definition of Seismic Reflection Data

D. Michon, R. Garotta

Indonesian Petroleum Association

... to record. This effect depends on the apparent horizontal velocity of the signal. In fact, reflections even horizontal ones, appear slanted due...

Ground Roll Removal and Signal Preservation by Cascading SVD Polarization Filters with Localized Fk-Filters; #41543 (2015)

Kristof De Meersman, Chris Ansorger

Search and Discovery.com

... too short data windows which results in over fitting the data and hence the removal of reflected signal. The CNA filter uses apparent velocity...

Abstracts: Attenuating 2D Noise in a 3D World; #90173 (2015)

David C. Henley

Search and Discovery.com

... event with some “apparent velocity” determined by the slope of the event with respect to the spatial and time coordinates of the particular trace gather...

Getting Something for Nothing: Noise Attenuation in an Aliased World; #41291 (2014)

David C. Henley

Search and Discovery.com

... domain using a narrow velocity range whose dip is parallel to the apparent velocity of the coherent noise. Application of short-window AGC in this domain...

Long Period Long Duration Seismic Events During Hydraulic Stimulation of a Shale Gas Reservoir, #40761 (2011)

Indrajit Das, Mark D. Zoback,

Search and Discovery.com

... the apparent velocity across the array. From apparent velocity we can get the approximate angle of arrival. 0s Lag time 0.2 s Density...

Wave Equation Shot Migration as a Ground Roll Filter.

Francisco Ortigosa, Pedro Muñoz

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

...) by the magnitude The points of an arbitrary straight line (fig. 1) given by f=vakx moves to another straight line f=v’akx, whose apparent velocity, slope, is given...

Data processing workflow for reflections from cement-formation interface in ultrasonic pitch-catch measurement in cased hole

Shaopeng Shi, Hua Wang, Meng Li, Aihua Tao

International Meeting for Applied Geoscience and Energy (IMAGE)

... Therefore, casing reflection and its multiples are the main noise for the TIE picking. (2)Apparent velocity: The manual-picked arrival of the A0 and TIE...

Experience in the Use of Seismic Stations with Magnetic Recording

B. I. Bespyatov, A. I. Khramoy

Petroleum Geology: A Digest of Russian Literature

... supression of interference it is insufficient to know the kinematic data (apparent velocity); it is necessary also to take into account the dynamic...

Abstract: Application of Acoustic Waveform Tomography to Marine Seismic Reflection Data Contaminated with Strong Guided Waves; #90187 (2014)

Rajesh Vayavur and Andrew. J. Calvert

Search and Discovery.com

...-K) domain filtering is of little much use, because these guided waves have a similar apparent velocity to the first arrivals. Since these guided...

Suppression of coherent and random noise using adaptive thresholding method in seismic-while-drilling

Yue Ma, Yujin Liu

International Meeting for Applied Geoscience and Energy (IMAGE)

...-velocity events with high amplitudes. Various filtering technologies have been developed to attenuate random and coherent noise in the transform...

VSP: Lessons from Numerical Simulation

M. Suprajitno, S. A. Greenhalgh

Indonesian Petroleum Association

.... The upgoing waves (reflections) are characterised by a negative apparent velocity i.e. time increases with decreasing depth. Note how the upgoing primary...

Application of accurate sedimentology interpretation method based on cost function in reservoir characterization

Huihuang Tan, Xinyi Duan, Xiaojie Zhang, Wei Gao

International Meeting for Applied Geoscience and Energy (IMAGE)

... velocity of multiples are great different from that of primaries, so it is quite effective to use the conventional filtering method in suppress multiples...

Abstract: Receiver Comparison for a Non-repeatable Earthquake Source on the Hussar 2011 Low-frequency Seismic Experiment; #90174 (2014)

Kevin W. Hall, Gary F. Margrave, and Malcolm B. Bertram

Search and Discovery.com

... have an apparent velocity across the seismic line of about 4500 m/s (ie. 4.5 km of seismic line in about one second). Receiver comparisons Geophone...

Abstract: Seismic Indicators for Porous Fluid-Saturated Layer, by G. M. Goloshubin; #90951 (1996).

Search and Discovery.com

Extending the Resolution of Seismic Reflection Exploration

L. R. Denham

Pacific Section of AAPG

... wavelength component is determined by a reflection’s apparent dip and frequency spectrum. Since wavelength equals apparent velocity divided by frequency...

Imaging of multiwell and multifiber walkaway DAS-VSP datasets in a CCUS demonstration project onshore Japan

Yuji Yamada, Shotaro Nakayama, Takuji Mouri, Manish Lal Khaitan, Philip Armstrong, Olga Podgornova

International Meeting for Applied Geoscience and Energy (IMAGE)

... (Sayed et. al., 2022) was also applied in the following two steps. First, data in the shot domain were scaled by the apparent velocity along...

Basic Seismic Processing: Part 7. Geophysical Methods

Peter M. Duncan

AAPG Special Volumes

.... The demultiple process attempts to remove these (Yilmaz, 1987). f-k or apparent velocity filter: Acoustic signals that are not reflections from...

Explainable AI: Can neural networks recognize first arrivals after wave separation?

Yanwen Wei, Zhenyu Zhu, Jicai Ding, Yichuan Wang

International Meeting for Applied Geoscience and Energy (IMAGE)

... separate waves with varying apparent velocity (Sabbione and Sacchi, 2016; Tang and Mao, 2022). Furthermore, multi-component separations are accomplished...

Field Technique Design for Seismic Reflection Exploration

L. R. Denham

Dallas Geological Society

.... The minimum wavelength component is determined by a reflection’s apparent dip and frequency spectrum. Since wavelength equals apparent velocity divided...

Specialized processing of a massive distributed acoustic sensing (DAS) 3D VSP in a producing well

Ali Sayed, Francesca Twynam, Ran Bachrach, Philippe Caprioli, Marcus Holloway, Qingsong Li, Reetam Biswas, Daniel Tebo, Sam Buist

International Meeting for Applied Geoscience and Energy (IMAGE)

...apparent velocity (equations 2b and 2c) or maximum apparent wavelength (equations 2d). Figure 2: Denoise examples for DAS common noise suppression (a) f...

Subtle Discontinuity Detection and Mapping for Carbon Sequestration Assessment in the Illinois Basin

J. H. McBride, R. W. Keach II, H. E. Leetaru, W. J. Nelson

AAPG Special Volumes

...-apparent velocity noise) and with 2-D seismic attributes. Here we present the results of applying a tau-p-based filter in combination with reflection...

A ground roll attenuation method based on CAResU-net with adaptively frequency-induced loss

Siyu Sun, Guosong Tang, Wei Bao, Guofa Li

International Meeting for Applied Geoscience and Energy (IMAGE)

.... INTRODUCTION Ground roll, characterized by its distinct response pattern of low frequency, low apparent velocity, and high energy levels, presents significant...

Resolving DAS versus geophone discrepancies using the DAS transform: A comparative study from the CaMI CCS field research station, Alberta

Ali Sayed, Robert R. Stewart, Marie Macquet, Don Lawton

International Meeting for Applied Geoscience and Energy (IMAGE)

.... DSR data were scaled by the apparent velocity (𝑐 𝑎𝑝𝑝 ) using equation 2 in the f-k domain (Figure 2b). The scaling factors were capped at 8000 m...

Application of Seismic Surveying to Recognition of Productive Part of Gas-Oil Strata

V. V. Churlin, L. A. Sergeyev

Petroleum Geology: A Digest of Russian Literature

... of their front - apparent velocity. This feature is particularly important in the direct exploration for oil and gas pools because resolution of waves...