Reservoir fluid study: described

In addition to the reservoir fluid samples studied, a sample of the NovaPlus synthetic oil base drilling mud additive used in each well was analysed using the methods described above. 

For mechanistic studies, ambient pressure experiments on emulsions and foams often offer significant experimental advantages over high-pressure experiments. However, high-pressure measurements are also needed since the phase behavior, physical properties of the fluids, and dispersion flow may all depend on pressure. Experiments under laboratory conditions that closely match reservoir conditions are particularly important in the design of projects for specific fields. Chapter 19, by Lee and Heller, describes steady-state flow experiments on CO2 systems at pressures typical of those used in miscible flooding. The following chapter, by Patton and Holbrook,... 

A critical review of emulsion flow in porous media has been presented. An attempt has been made to identify the various factors that affect the flow of OAV and W/O emulsions in the reservoir. The present methods of investigation are only the beginning of an effort to try to develop an understanding of the transport behavior of emulsions in porous media. The work toward this end has been difficult because of the complex nature of emulsions themselves and their flow in a complex medium. Presently there are only qualitative descriptions and hypotheses available as to the mechanisms involved. A comprehensive model that would describe the transport phenomenon of emulsions in porous media should take into account emulsion and porous medium characteristics, hydrodynamics, as well as the complex fluid-rock interactions. To implement such a study will require a number of experi-... 

The importance of fluid crossflow between layers, and the enhanced viscous crossflow effects of the polymer in the reservoir have been discussed. In order to study this crossflow behaviour in the laboratory, we must be able to design experiments that show these effects in a correctly scaled way. However, it is well known that there are other crossflow effects which occur, both in the field and in experimental systems, and it is important to consider how these relate in magnitude to the viscous crossflow. All crossflow effects are summarised in Figure 8 and are described below ... 

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