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Mazeraud A.,E and P Congo | Carbonnier B.,E and P Congo | Painchaud Y.,E and P Congo | Poilpre J.F.,E and P Congo | Ferrand P.,E and P Congo
72nd European Association of Geoscientists and Engineers Conference and Exhibition 2010: A New Spring for Geoscience. Incorporating SPE EUROPEC 2010 | Year: 2010

Bilondo is a Miocene turbiditic oilfield located in deep offshore Congo Republic. Bilondo reservoirs are made of 5 sandy flow units separated by continuous shaly barriers. Bilondo is also divided into 3 main compartments by normal faults. Pressure measurements recorded in one well, drilled 8 months after first oil, show that all the reservoirs are depleted, including the non produced ones. The presence of vertical connections between all the sandy reservoirs, crossing the shaly barriers, was apparent. These connections are linked to the development of sandy injections identified and clearly confirmed by borehole imageries recorded in horizontal wells. The main challenge was to incorporate these injectites in our geological model to better reproduce the dynamic behaviour. By performing a trial and error cycle between Dynamic and Geological models, it was possible to match the field history: pressure measurements and water breakthrough after 3 months notably. Finally, the locations of future wells were optimized according to our new geological model. This study underlines the importance of a phased development with the drilling of horizontal producers and an adapted acquisition data for such heterogeneous turbiditic fields. © 2010, European Association of Geoscientists and Engineers. Source

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