The Atlantis OBS Project: OBS Nodes-Defining the Need, Selecting the Technology, and Demonstrating the Solution

Beaudoin, Gerald; Michell, Scott

doi:10.4043/17977-ms

Cited by 13 publications

(2 citation statements)

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“…OBN technology development -While the Atlantis team struggled to image the subsalt portions of the field, BP's R&D group, Exploration & Production Technology Group (EPTG), was working to develop an autonomous node acquisition system to be able to acquire wide-azimuth data 7 .…”

Section: Seismic Implementation At Atlantismentioning

confidence: 99%

SS: Thunder Horse and Atlantis Deepwater Frontier Developments in the Gulf of Mexico: Paper Title - Two Assets, Two Approaches to Tackling Subsalt Imaging - Thunder Horse and Atlantis

Howie

Trout²

2010

All Days

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The BP-operated Thunder Horse and Atlantis developments are giants among the deepwater subsalt fields. It was recognized that effective development of these large fields would require a step-change improvement in the seismic imaging. Through close cooperation between asset and R&D teams, BP has pursued a two-pronged approach to deliver improved seismic imaging for these and other subsalt deepwater fields. New seismic acquisition and new processing techniques were needed to significantly improve the subsalt image. The methods of acquisition and processing applied to each field are very different and are dependent on field-specific issues that include: the timing and pace of development, existing seismic data, infrastructure, seafloor bathymetry, salt geometry, and reservoir configuration. Thunder Horse initiated an aggressive anisotropic reprocessing project incorporating three independent 3-D seismic surveys in a multi-azimuth processing sequence. Atlantis pursued a new 4-component ocean-bottom-node technology to provide uniform wide-azimuth acquisition, and then pioneered new receiver-centric processing to image the data. Both implementations yielded dramatic seismic image improvement while highlighting additional challenges.

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Section: Seismic Implementation At Atlantismentioning

confidence: 99%

SS: Thunder Horse and Atlantis Deepwater Frontier Developments in the Gulf of Mexico: Paper Title - Two Assets, Two Approaches to Tackling Subsalt Imaging - Thunder Horse and Atlantis

Howie

Trout²

2010

All Days

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“…A number of other companies have recently developed OBS nodes, notably Fairfield in co-operation with BP in the Atlantis project (Beaudoin and Michell, 2006;Michell and Grisham, 2006). While there are obvious superficial similarities among the models, (e.g.…”

Section: Development and Testingmentioning

confidence: 99%

A New Ocean Bottom Seismic Node System

et al. 2007

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractNew seismic technology aims at imaging the blind spots of conventional methods. One such new technology is Ocean Bottom Station (OBS) nodes. Such nodes record four component (4C) data; the water-borne pressure and the three components of seabed motion.Oceanographic Research groups have long been using OBS. After testing one of the leading brands of academic type OBS technology in 2002, we developed a commercial system which is deployed using Remotely Operated Vehicles (ROV). We tested the new OBS in 2006 in Louisiana.Wide azimuth geometry and well sampled common receiver gathers are natural for OBS. These provide better illumination and are suitable for 3D Wave Equation Migration (WEM). Better illumination and WEM enable improved imaging of complex structures under complex overburden such as salt. The P waves are recorded on both the hydrophone and the geophones and enable separation of the data into down-and up-going waves, which in turn enables demultiple and imaging of waves which are conventionally considered multiples and therefore discarded. Given the cost of deep water drilling, such improved imaging and demultiple can make the difference between success and failure when exploring challenging areas.Shear waves are recorded by geophones on the seabed. Such shear waves are generated by P to S conversion so they do not require special shear sources. The converted PS reflections provide additional information to what is in the PP reflections. The additional information provided by shear waves is useful for improved characterization of lithology and fractures.We present the engineering, design and field data from the 2002 and the 2006 tests. We used the data to test the coupling for P and S waves and demonstrate imaging with multiples.

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Ocean Bottom Marine Seismic Methods

Jack¹

2021

Integration of Geophysical Technologies in the Petroleum Industry

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The Atlantis OBS Project: OBS Nodes-Defining the Need, Selecting the Technology, and Demonstrating the Solution

Cited by 13 publications

References 0 publications

SS: Thunder Horse and Atlantis Deepwater Frontier Developments in the Gulf of Mexico: Paper Title - Two Assets, Two Approaches to Tackling Subsalt Imaging - Thunder Horse and Atlantis

SS: Thunder Horse and Atlantis Deepwater Frontier Developments in the Gulf of Mexico: Paper Title - Two Assets, Two Approaches to Tackling Subsalt Imaging - Thunder Horse and Atlantis

A New Ocean Bottom Seismic Node System

Ocean Bottom Marine Seismic Methods

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