DLP Webinar with Antony Price

Sub-salt Modelling in 3D - Integration of seismic, well and gravity data validated by drilling

 

When

  Monday 30 October 2017 - 10.00 AM (CET)

Duration

  1 hour lecture + 30 minutes Q&A

Language

  English

Fee

  Free for EAGE members 

Requirements

  Computer with Internet connection and audio/video capabilities

 

EAGE webinars are live presentations with lecturers selected from the best presentations at EAGE Conferences. After the lecture, participants can interact with the instructor and ask questions. Joining a webinar is simple: all you need is a computer with Internet connection and audio/video capabilities (no software installation required). This service is complimentary for EAGE members and places are limited.

 

Webinar description

Offshore sub-salt seismic imaging along the West African margin is a challenge in many areas, and with complex salt geometry, seismic depth imaging alone faces certain limitations. In an effort to further de-risk structures sub-salt, we integrated with gravity data in 3D. We detail that the incorporation of an independent geophysical parameter, such as density can effectively de-risk these difficult targets.

Coincident gravity anomalies and seismic base salt closures were observed in this locality. The gravity anomalies are larger in amplitude and not equivalent to any possible post-salt structure, independent of density. In short, the scenario 3D gravity modelling suggests that these are indeed sub-salt structures, most likely localized basement or some other high density closures - which is consistent with the seismic imaging.

Additional modelling of the various velocity cubes used for sub-salt seismic imaging in 3D using gravity have been used to globally select the ‘best’ velocity model to better constrain deep seismic imaging. Note that one of these targets has since been drilled, intersecting gas/condensate in sandstone reservoirs validating the sub-salt interpretation and the petroleum system in this area.

Additional sub-salt structures identified using this methodology are currently being evaluated by new seismic, gravity and magnetic acquisition.

 

Participants' Profile

This lecture is aimed at sub-salt explorers in a variety of basins, potential field specialists, seismic imaging and depth migration specialists.

 

About the Lecturer

Antony PriceAntony Price is a specialist geophysicist in non-seismic techniques from R&D to feasibility to acquisition and interpretation/modelling. Currently with Total in Pau, France, Antony’s career spans more than 20 years with the last 10 at Total, and started at the University of Western Australia developing processing and interpretation techniques for gravity gradient data in the 1990’s alongside the development of a cryogenic system. Antony’s interests include integration of seismic and non-seismic data, common earth model inversion and joint inversion of gravity, magnetic, electromagnetic and seismic information.

 

Registration CLOSED

In order to ensure an interaction of good quality and a sufficient time for questions and answers, spaces for this webinar are limited. The applications for this webinar have reached the maximum capacity and registration is now closed. 

This service is dedicated to EAGE members: only applicants with a valid EAGE membership will be admitted. Admitted applicants will receive a confirmation of their registration and the link for connecting to the webinar. If you were admitted, you can expect to receive a confirmation immediately. The link will be sent to you about 1 hour prior to the start of the webinar and you will be able to join the connection 30 minutes before the scheduled start time.

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