Seismic time-lapse in a maastrichtian turbidite field in Campos Basin/Brazil, with support of elastic inversion and seismic modelling studies

Autor: Klédson Tomaso, Manuel Peiro, Pedro Monteiro Benac, Vinicius Costa Lopes Paes
Rok vydání: 2015
Předmět:
Zdroj: 14th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 3-6 August 2015.
DOI: 10.1190/sbgf2015-161
Popis: Seismic time-lapse studies (S4D) in sandstone reservoirs have been successfully carried out in various fields of Campos Basin, Brazil, over the last years (example in Johann et al. 1 ). Very frequently, it was proven as an excellent tool of reservoir characterization, mainly when it is integrated with geological and engineering data. The main goal of time-lapse seismic interpretation generally is to identify effects of pressure and saturation variations, focusing in management and projecting of oil and gas fields. In many cases it has been possible to get this interpretation purpose. In this offshore maastrichtian turbidite field, in central part of Campos Basin, we can see a good example of a seismic time-lapse’s application for achieving the objectives mentioned above. This paper shows how an integrated 4D study could help us to provide useful information to better understand the reservoir changes and to provide insights for the field management. Basically, we could highlight areas on reservoir with high probability of pressure/saturation changes (dynamic information) and consequently infer about porosity/permeability distribution qualitatively and structural features (static information). And we judge that both required information were satisfactorily achieved since all available data, like geological/engineering model, hard dynamic, production/injection history and seismic data, converged to a better understanding of this reservoir. We must add in seismic data all set of processing data, including mainly the 4D simultaneous elastic inversion that it was an excellent tool of investigations by providing dynamic elastic properties. A key element was also the input from the Forward modelling study to translate dynamic simulator properties into elastic attributes and synthetic 4D signal. These steps of the workflow are described as well as the main results of this 4D study.
Databáze: OpenAIRE
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