A New Seismic Method to Significantly Improve Deeper Data Character and Interpretability

Andrew Long, Guillaume Cambois, Gregg Parkes, Anders Mattsson, Terje Lundsten, Mazin Farouki

Indonesian Petroleum Association

... acquisition has been tested in the southern Browse Basin during 2008 in an effort to remove both source ghost and receiver ghost effects from towed streamer...

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)

...requency signal and removing the source ghost from the data without introducing ringing or over-amplifying the low frequency noise (Figure 4). A combi...

Abstract: Physical Modeling for Azimuthal AVO Over a Simulated Fractured Medium; #90174 (2014)

Faranak Mahmoudian, Gary F. Margrave, and Joe Wong

Search and Discovery.com

... the overlapping of the primary and ghost events. The picked reflection amplitudes required corrections to make them suitable for an AVAZ study. In addition...

Broadband Seismic Technology and Beyond: Part VIII: BroadSeis in Exploration

Lasse Amundsen, Martin Landrø, Vetle Vinje, Jo Firth

GEO ExPro Magazine

... in the shallow detail and in the fractured basement. Ghost-Free Data As discussed in GEO ExPro, Vol. 11, No.1, BroadSource is a synchronized source with two gun...

How Can We Reduce the Environmental Impact of Marine Seismic Surveys?

Andrew Long, Mickael Bastard, Endrias Asgedom, Jens Fredrik Wisløff, Magnus Christiansen

Australian Petroleum Production & Exploration Association (APPEA) Journal

..., three-dimensional variation that varies as a function of source emission azimuth and angle measured from vertical (the ‘source directivity...

Marine Seismic Sources: Part II: Air-Gun Arrays for Non Experts

Lasse Amundsen, Martin Landrø

GEO ExPro Magazine

... are caused by the source ghost. Note that the primary-to-bubble ratio is frequency dependent. source directivity In seismic surveying, air-gun arrays...

Modern Marine 3D Seismic Acquisition - Technical Considerations

Chris Walker

Petroleum Exploration Society of Australia (PESA)

.... The resultant information is plotted in a polar form, similar to that used for displaying the directivity response of the seismic source and a typical...

Direction of Crustal Movements Indicated by Earthquake Data: ABSTRACT

William Stauder

AAPG Bulletin

... of other methods, including the use of S waves and the application of surface waves in determining the directivity, dimensions, and initial phase...

Value of marine vibrators for effective frequency-dependent spatial sampling of seismic wavefield

Arash JafarGandomi, Aparajita Nath, Sergio Grion

International Meeting for Applied Geoscience and Energy (IMAGE)

... that maximizes constructive source ghost interference and minimizes rough-sea effects (JafarGandomi et al., 2020). The use of diverse frequency bands...

Seismic Frequency Bandwidth Constraints in Deepwater Locations

Andrew Long, Iain Buchan

Indonesian Petroleum Association

..., 3/12 – 206/276 filter settings (Hz/dB per octave), 2 ms sample rate 28° C water temperature Note that any source or receiver directivity effects...

Abstract: Experimentally Achieving Borehole Radar Antenna Directivity in the Time Domain in the Presence of Strong Mutual Coupling, by Declan Vogt and Teboho Nyareli; #90082 (2008)

Search and Discovery.com

Abstract: Is Magnitude the Parameter of Choice for Induced Seismicity Regulations?;

Alexandros Savvaidis, Pierre-Francois Roux, Florentia Kavoura

Search and Discovery.com

..., peak ground motion is critically controlled by parameters such as but not limited to site condition, source directivity, distance, and source...

ABSTRACT: Restoring High Resolution in Surface Seismic Data; #90051 (2006)

Khalid Alrufaii, Kangan Fang

Search and Discovery.com

... exploration and development efforts. The resolution of seismic data is affected by many factors such as acquisition layout, strength and directivity...

Overcoming signal processing challenges on a deep-water sparse OBN survey: A case study from the Gulf of Mexico

Matthew Salgadoe, Nigel Seymour, Hongyan Li, Di Chen

International Meeting for Applied Geoscience and Energy (IMAGE)

... nature of this data. Applying the source directivity correction in the tau-px-py space further improved the amplitude and phase consistency of the wavelet...

Land Seismic Source Study: ABSTRACT

William A. Schneider

AAPG Bulletin

... spectra, source repeatability, source directivity, and intensity levels from downhole measurements, (2) comparison of surface-wave noise-generation...

3D installation of fiber cables for acquiring 3C DAS array data

Yingping Li, David Li, Lianjie Huang, Yingcai Zheng

International Meeting for Applied Geoscience and Energy (IMAGE)

... directivity. Since a source azimuth and incident angle can be determined by the DAS CCC array, we can correct for the effects of fiber directivity...

High-resolution imaging using least-squares migration in the image domain (LSMi) for a marine distributed acoustic sensing (DAS) 3D-VSP

Ali Sayed, Francesca Twynam, Ran Bachrach, Maud Cavalca, Leo Leon, Maria Shadrina, Qingsong Li, Reetam Biswas, Daniel Tebo, Sam Buist

International Meeting for Applied Geoscience and Energy (IMAGE)

... in conjunction with the OBN survey. A single vessel with two source arrays of 5110 cu in volume each, was shot in flip-flop fashion. The maximum surface...

Amplitude Versus Offset (AVO) Analysis: Part 7. Geophysical Methods

Allan T. Long, R. C. Anderson

AAPG Special Volumes

.... These corrections are distributed among the surface terms of source, receiver, and offset, plus a single subsurface (CDP or geological) term...

3D ultra high resolution seismic processing „ A case study from offshore USA

Bertrand Caselitz, Luca Limonta, Julien Oukili, Jonas Tegnander, Vicky Catterall

International Meeting for Applied Geoscience and Energy (IMAGE)

..., a source directivity compensation is applied using modeled notionals, resulting in enhanced resolution and simplified geological features. Figure 1 shows...

Abstract: Aspects of the Quaternary Geology of the San Fernando Valley, California, by J. C. Tinsley III; #90904 (2001)

Search and Discovery.com

Restoring High Resolution in Surface Seismic Data

Search and Discovery.com

Anisotropy analysis from 3D VSP surveys acquired at Otway site

Sofya Popik, Andrej Bona, Roman Pevzner

Petroleum Exploration Society of Australia (PESA)

... as a source. Seismic image significantly depends on the quality of velocity model used for imaging. In cases when anisotropy is present, its effect cannot...

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)

... behind casing strings of two deviated wells. A complex pseudo-2D source geometry was applied due to logistical and operational constraints. This DAS-VSP...

A Sound Exposure Level (SEL) Study for a 3D Seismic Survey off the WA Coastline, Browse Basin

Andrew S. Long, Jens F. Wisløff, Jaafar Ali, Averrouz Mostavan, David Hedgeland, Alec J. Duncan, Amos L. Maggi, Jeremy Colman

Petroleum Exploration Society of Australia (PESA)

... Statement 2.1 gives specific guidelines regarding acceptable 12300 Sound Exposure Levels (SEL) vs distance thresholds from a seismic source location...

Evaluating HD weathering surveys and surface seismic with DAS in a sand dune environment

Andrey Bakulin, Ezzedeen Alfataierge, Roman Pevzner

International Meeting for Applied Geoscience and Energy (IMAGE)

.... Distributed Acoustic Sensing (DAS) offers a potentially more attractive alternative with less cost, provided the directivity challenge can be solved. DAS...