Calibrating 3D VSP image area with finite difference modeling – A case study in Gulf of Mexico

Rollins, Francis; Sandschaper, J. R.; Li, Qingsong; Ye, Fiona; Chakraborty, Samarjit

doi:10.1190/segam2015-5873629.1

Cited by 9 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Great efforts have been made to obtain a better tilted transverse isotropic (TTI) velocity model for the Mad Dog field using multi-wide azimuth data (Rollins et al, 2013). Yet 3D VSP surveys may offer even better opportunities to obtain high quality imaging near the wellbore compared to surface steamer data due to less distorted wave propagation paths (Rollins et al, 2015). To assist the continued development of the Mad Dog field in the GoM, BP acquired the largest conventional 3D VSP data set to date in the world in July 2015, intending to complement the existing towed streamer data.…”

Section: Introductionmentioning

confidence: 99%

“…However, due to the Mad Dog 3D VSP survey's long-offset and full-azimuth acquisition geometry, the 1D designature method was not sufficient. We utilized near field hydrophone (NFH) data to perform shot-to-shot directional designature (Lee et al, 2014;Li et al, 2015) on the 3D VSP data using an inversion algorithm. This process removed the lowfrequency bubble energy and the distinct gun signature among different azimuths and take-off angles caused by the spatial extent and the asymmety of the gun array.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

3D VSP processing and imaging: A case study at Mad Dog, Gulf of Mexico

Lee

Gou

Rollins³

et al. 2016

SEG Technical Program Expanded Abstracts 2016

Self Cite

View full text Add to dashboard Cite

3D VSP data provides a unique opportunity to improve image resolution and fault definition in the vicinity of a well. However, the processing and imaging of VSP data requires special accommodations for its distinctive acquisition geometry. In this abstract, we demonstrate two key VSP pre-processing steps that greatly impacted the final image from the Mad Dog 3D VSP data, including XYZ vector field reorientation based on 3D elastic finitedifference modelling, and shot-to-shot directional designature using near field hydrophone data. We also discuss how utilizing the multiple energy-in addition to primaryextends our capability to image the shallow overburden.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

3D VSP processing and imaging: A case study at Mad Dog, Gulf of Mexico

Lee

Gou

Rollins³

et al. 2016

SEG Technical Program Expanded Abstracts 2016

Self Cite

View full text Add to dashboard Cite

show abstract

Development of a subsea distributed acoustic sensing acquisition system

van Gestel,

Soulas,

Naldrett

2024

GEOPHYSICS

View full text Add to dashboard Cite

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.

show abstract