Campos basin

Several different reactor types were used for catalyst evaluation, including a DCR pilot riser [3] an ACE fixed fluidized bed (FFB) reactor [7], a Riser simulator [4,9], and a specially designed extended residence time circulating pilot unit. The reaction conditions of each of the reactors will be reported in the sections dealing with the specific reactor type. Different grades of Brazilian Campos Basin derived VGOs were used in the experiments. Feed properties are presented in Table 2.1. 

Cover The lop photograph is a hydrate plug in a Campos Basin slugcatcher, courtesy of Petrobras the lower photograph is of a 2 m X 2 m hydrate mound in Barkley Canyon, courtesy of MBARI, the Monterey Bay Aquarium Research Institute. 

Carvalho, M.V.F., De Ros, L.F. Gomes, N.S. (1995) Carbonate cementation patterns and diagenetic reservoir facies in the Campos Basin Cretaceous turbidites, oflFshoreeastern Brazil. Mar. Petrol. GeoU 12, 741-758. 

Moraes, M.A.S. (1989) Diagenetic evolution of Cretaceous-Tertiary turbidite reservoirs, Campos Basin, Brazil. Bull Am. Ass. Petrol. Geol, 73, 598-612. 

The Namorado Sandstone is one of the main oil reservoirs of the Campos basin, offshore Brazil, and consists of a thick turbiditic sequence deposited during the Albian-Cenomanian. Calcite cement is volu metrically the most important diagenetic parameter controlling reservoir quality in the sandstones. 

Fig. 1. Location of the deep-water (250-2000 m) Albacora Field offshore Campos basin, Brazil, where the turbiditic Namorado Sandstone is an important oil reservoir. Isocontours shown represent water depth.

Fig. 2. Stratigraphical column of the Campos basin showing the position of the Namorado Sandstone. Modified from Rangel el al. (1994). 

Fig. 4. Schematic model of oil migration and accumulation in the Campos basin. The oil present in these turbidites was generated from the lower Cretaceous lacustrine shales of the Lagoa Feia and migrated into the reservoirs along major faults. The seal is the Macae Formation, which consists primarily of marls and calcilutites. Modified from Figueiredo (1985).

Spadini, A.R., Esteves, F.R., Dias-Brito, D., Azevedo, R.L.M. Rodrigues, R. (1988) The Macae Formation, Campos Basin, Brazil its evolution in the context of the initial history of the South Atlantic. Rev. Bras. Geoc., 18, 261-272. 

To illustrate the matrix damage problem in the reservoir and scale formation in production wells an application using the numerical code is presented. In this example, sulfate scaling occurs by mixing of injected water (seawater rich in sulfate and poor in Ca", Sr" and Ba ) with a connate water rich in Sr and Ba" cations. From this mixing strontium sulfate salt (SrSOj) and barite (BaS04) precipitations are expected. This kind of scaling is typical from the North Sea (Osborne et al., 1994) and also common in Campos Basin, Brazil (Silva et al., 2001). 

Enchova (production platform) Campos Basin, Brazil, 1984 42 fatalities Blowout during evacuation the lifeboat lowering mechanism failed. 

Production Explosion, fire and vessel sinking Campos Basin, Brazil 710... 

Crude oils were irradiated with Hg lamp and He-Ne laser. Two types of oil were used, with three different samples. One sample is from Campos Basin - RJ. The other two were obtained from Arabian oil part of the oil was used without treatment (total Arabian oh), and part was distilled at 260 °C, (partial Arabian oil). The oil samples were subjected to irradiation under commercial mercury lamp (street Hghting), of 450 W, which had its protective cover removed. Oil samples were also subjected to irradiation under He-Ne laser with an output of 15 mW and monochromatic emission of 632 nm. EPR measurements were performed on the BRUKER ESP 300E Series equipment, operating in X- band (9 GHz) at room temperature. 

No variations in g-factor were observed in non-irradiated samples for any of the paramagnetic species (Table 3). The g-factor determined for the free radical signal in Brazilian oil (Campos Basin in the state of Rio de Janeiro) was 20045+0.0001 (Table 3), suggesting the presence of phenoxy radicals, i.e. radicals partially localized in aromatic systems due to the oxygen. There was no variation in the g-factor values for the free radical, whereas the line width (Mlpp) showed a significant decrease (Fig. 11). 

The Enchova Central Platform was located in the Campos Basin close to Rio de Janeiro, Brazil, and it was operated by the Brazilian company called Petrobras. On August 16,1984, the accident occurred due to a blowout, which, in turn, caused fire and explosion at the central platform. Although most of the workers were evacuated safely from the platform by helicopter and lifeboats, 42 of them lost their lives during the evacuation process [3,10]. 

---