Full text loading...
-
Anisotropic AVO in Brazilian Equatorial Margin: a Modeling Study from Rock to Log and Seismic
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, First EAGE Conference on Deepwater Equatorial Margin: New Energy Frontier for South America, Aug 2023, Volume 2023, p.1 - 6
Abstract
Summary
The amplitude versus offset (AVO) technique is well established as a “direct hydrocarbon indicator” for some plays but it is well known that it can be also a good lithology indicator. In some areas of Potiguar basin, reservoir quality makes it difficult to apply AVO as a fluid indicator. It represents a good opportunity to try to apply the method for reservoir quality forecast. We observed noticeable velocity anisotropy in laboratory data available from two wells in a potentially prolific area. The available sampling and measurement capabilities does not allow a complete anisotropy characterization, we are able to estimate only two anisotropy parameters, because we have only core plugs vertically and horizontally oriented. However, the seismic processing in the area involved anisotropic migration, and we have a seismic-derived anisotropic parameter in both wells. We used the laboratory and seismic-derived information to help us to construct AVO scenarios in the area. Here we will compare usual AVO modeling with anisotropic case and compare “good” and “poor” reservoir modeling in both cases.
© EAGE Publications BV