Demonstrating the value of subsalt 3D VSPs: A case study at Thunder Horse North, Gulf of Mexico

Reitz, Anya; Hartman, Kenneth

doi:10.1190/segam2017-17739008.1

Cited by 7 publications

(2 citation statements)

References 7 publications

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“…Oil is contained within three middle-lower Miocene units with high reservoir pressures and temperature. Since the THS discovery in 1999, a unique variety of data has been acquired to help geoscientists understand better the reservoir and the overall geologic model in the area (Pfau et al, 2002;Ray et al, 2003;Hartman et al, 2015;Reitz and Hartman, 2017).…”

Section: Introductionmentioning

confidence: 99%

Improved imaging at Thunder Horse South with joint surface and borehole seismic tomography

Zdraveva¹,

Solano²,

Zaman³

et al. 2019

Proceedings of the 16th International Congress of the Brazilian Geophysical Society&Expogef

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Section: Introductionmentioning

confidence: 99%

Improved imaging at Thunder Horse South with joint surface and borehole seismic tomography

Zdraveva¹,

Solano²,

Zaman³

et al. 2019

Proceedings of the 16th International Congress of the Brazilian Geophysical Society&Expogef

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“…Historically, 3D VSP surveys are conducted either to fill illumination gaps or to provide higher resolution at target (Reitz and Hartman, 2017). Today, with the introduction of distributed acoustic sensing (DAS), they are becoming more affordable and a common solution for 4D and monitoring (Zwartijes et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Joint Inversion And Cross-Validation Of Bore-Hole And Surface Seismic Data For Reducing The Uncertainty Of Anisotropic Models

Zdraveva¹,

Ramirez²,

Chen³

2018

First EAGE/PESGB Workshop on Velocities

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SummaryAdding extra data and information in the process of anisotropic Earth model building (EMB) is very important to reduce the uncertainty of the results. Borehole seismic data, either zero-offset, walkaway or 3D vertical seismic profile (VSP) are very valuable but rarely available in large exploration areas. In recent years, with the wider spread of distributed acoustic sensing (DAS), 3D VSP surveys are becoming more common to help interpretation related to advanced development programs and production well placement. In some cases, they are even preferred as a foundation for 4D work and that sets even higher requirements for the accuracy of the Earth models. In this work, we discuss and show how 3D VSP data can be used in two different stages of modern surface seismic anisotropic EMB workflows: model validation and model updating with joint tomography. We demonstrate the value of incorporating 3D VSP information using a real data example from the Green Canyon area of the Gulf of Mexico.

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Development of a subsea distributed acoustic sensing acquisition system

van Gestel,

Soulas,

Naldrett

2024

GEOPHYSICS

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Over the last decade Distributed Acoustic Sensing (DAS) data acquisition has seen great improvements from better interrogators, engineered fiber and lessons learned from subsea installation and acquisition. This has given us confidence that DAS cables can be installed in wells with subsea trees to be used as receivers for Vertical Seismic Profile (VSP) seismic imaging. VSP imaging for deepwater fields has shown to provide better illumination and higher frequency seismic data. Permanent DAS cable installation can be used to acquire highly repeatable time lapse (4D) data. DAS cables were installed in a number of subsea wells on two deepwater oil fields with the intention to cover the crest of these fields with high frequency seismic data. A system was developed to allow for DAS acquisition on these offshore, subsea wells with long distance tie backs using permanently installed interrogators on the floating platforms and engineered fiber in the wells. On each of these fields a DAS cable has now been installed and a subsequently a zero offset (ZO) DAS VSP was acquired for verification and commissioning. These ZO DAS VSP acquisitions showed high fidelity installations resulting in DAS VSP data with excellent data quality. These first subsea DAS acquisitions show great promise and further installations and acquisitions are planned with the ultimate goal of providing high frequency seismic images over the crest of these fields to reduce the uncertainty in decisions around reservoir management and future infill drilling.

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Demonstrating the value of subsalt 3D VSPs: A case study at Thunder Horse North, Gulf of Mexico

Cited by 7 publications

References 7 publications

Improved imaging at Thunder Horse South with joint surface and borehole seismic tomography

Improved imaging at Thunder Horse South with joint surface and borehole seismic tomography

Joint Inversion And Cross-Validation Of Bore-Hole And Surface Seismic Data For Reducing The Uncertainty Of Anisotropic Models

Development of a subsea distributed acoustic sensing acquisition system

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