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Air gun

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Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5902456
... Summary We reformulate the usual approach to estimation of air-gun signatures from near-gun records as a least-squares inversion. We show that this has advantages compared to the commonly-used iterative method; we are able to more accurately treat the motion of the air bubble from each gun...
Proceedings Papers

Paper presented at the 2001 SEG Annual Meeting, September 9–14, 2001
Paper Number: SEG-2001-0041
... ABSTRACT Continuous measurement of marine source signatures is becoming an oil company requirement in offshore petroleum exploration. There is a simultaneous service company requirement to simplify and streamline the air gun arrays. Pressure measurements at the air gun ports have the potential...
Proceedings Papers

Paper presented at the 1996 SEG Annual Meeting, November 10–15, 1996
Paper Number: SEG-1996-0013
... ABSTRACT No preview is available for this paper. bolt technology corporation transducer initial value pressure transducer rodney johnston reservoir characterization wave function upstream oil & gas air gun derivative signature computation edinburgh ziolkowski far-field...
Proceedings Papers

Paper presented at the 1984 SEG Annual Meeting, December 2–6, 1984
Paper Number: SEG-1984-0267
... ABSTRACT No preview is available for this paper. differential equation geophysicist noise gun model 60-inch3 air gun interaction air gun frequency air gun model port area synthetic signature bubble interaction signature experiment gun array johnston hull reverberation...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216327
... ABSTRACT We present an approach to air-gun array signature estimation that builds on the well-established method of solving for notional sources and seeks to take account of non-linear perturbations to the down-going wavefield, including attenuation of the ghost due to onset of cavitation...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17674813
... ABSTRACT A new-design of air gun has a reduced output at high frequencies, a lower peak pressure and a smoother pulse onset. We have made seismic images of the same geology both using this new air gun and also using standard air guns. Furthermore we recorded the acoustic signal at many ranges...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17666236
... using a 3D anisotropic model. We made synthetic virtual 4C data with a hundred of air-gun shots and one OBS by applying VSM. Using the virtual 4C data set, we estimate azimuthal anisotropic properties by applying the Alford rotation. Our results show that the proposed method can provide the anisotropic...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-355
... ABSTRACT Air gun has become a common tool in deep-sea resource exploration for its low cost and green environmental protection. Due to the highly compressed air inside the air-gun chamber is released for a brief time, sound wave is generated almost simultaneously. However, an undesired air-gun...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13841168
... ABSTRACT In the context of designing a new air-gun with reduced high-frequency emissions, we developed computational fluid dynamics models that provide new insight into the dynamic behavior of air-guns. We combined these simulations with video images and high-fidelity acoustic measurements...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5825103
... The experimental research of air-gun source in muddy conditions Yaoping Yu *, Haolin Chen, Hongjun Zhang, Xiaodong Li, and Chengzhou Ni, BGP CNPC Summary The explosive is the conventional source for seismic exploration in muddy conditions with 0-1m water. However, it will bring certain safety...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5819978
... Summary Recent advances in marine broadband seismic data acquisition have led to a range of new air-gun source configurations. The air-gun arrays have conventionally been kept at a constant depth, but in order to attenuate the source ghost reflection new multi-level sources have entered...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5812558
... Summary Air-gun source systems are key pieces of equipment used in the offshore seismic exploration of transition zones, which include swamps, water networks, rivers, lakes, beaches, and the shallow and deep seas, among others. In order to meet the requirements for seismic exploration...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5836115
... parkes vector array directivity reservoir characterization takeoff angle annual international meeting directional deconvolution inversion scheme directivity equation ziolkowski upstream oil & gas amplitude variation variation air gun array array signature avo analysis...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5843413
... Summary We have developed a new air-gun that optimizes the useful seismic output while limiting any environmental effects from unnecessary high-frequency emissions. We regulate the output at the air-gun’s ports by controlling the motion of the mechanical components that release air from...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-0445
... Summary A new type of air-gun has been developed that has a greatly reduced acoustic output at high frequencies. The high frequencies originate from the rising edge of the primary pulse; the reduction has been achieved by a significant redesign of the mechanism that controls the air release...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0940
... Summary In this paper, we propose to reconstruct and monitor the three-dimensional far-field signals radiating from air-guns sources during marine seismic acquisitions. The far-field signature (at vertical incidence) is estimated and monitored through several indicators in the time...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0489
... SUMMARY We describe an alternative way of modeling clustered air guns, by allowing the shape of the air bubbles to be described by isosurfaces of an incompressible velocity potential, as opposed to the traditional way of considering them as perfect spheres. This method solves some close-range...
Proceedings Papers

Paper presented at the International Conference on Health, Safety and Environment in Oil and Gas Exploration and Production, September 11–13, 2012
Paper Number: SPE-158038-MS
... & gas ir picture footage monitoring seismic survey visual observation air gun array safety zone marine mammal swimming track retrospective analysis Marine mammals rely on underwater sound for navigation, communication, prey location, and to acquire information about their environment...
Proceedings Papers

Paper presented at the 2011 SEG Annual Meeting, September 18–23, 2011
Paper Number: SEG-2011-0077
... ABSTRACT The low frequency spectral characteristics of signals emitted from marine airgun arrays are constrained by the source ghost, the response of the air-guns, and the air-gun array design. Both the ghost and the response of air-guns are related to the tow depth(s). This paper analyses...
Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-1677
.... In this study, we present a new approach to generate reflected shear wave data from conventional marine air gun data recorded with OBC by using virtual source method. In this method, two horizontal component receivers of OBC are turned into 2-C virtual sources, and 2C × 2C virtual shear source data sets...

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