Abstract:
Reservoirs rocks and porous medium can be of high economical interest. The porous
mediums are allocated to fluid storage and circulation. They can be under the control of diverse parameters when they are found at reservoir conditions. Involvement of clay fraction and type, filling pores, is of high contribution towards the reduction of pore volumes. It is responsible for the creation of microbarriers and occlusion for fluid accumulation and mobility. In the case study, investigation based on laboratory experiments has revealed, in that regards, that reservoir is mainly controlled by compaction in addition to the type and fraction of simulated cement. It has been found that impact on petrophysical characteristics was own to the type of clay, beyond pressure and grain texture type. Kaolinite clay mineral type was the less harmful with regard to the permeability and porosity in comparison to illite and mainly bentonite. However, in the presence of aqueous solution, swelling intensity was higher with bentonite mineral in comparison to kaolinite and illite.
During drainage and essentially the imbibation, impact from the wettability (soaking....) system was defined.
Results were in harmony with the imbibation rather than drainage at atmospheric conditions.
Within the diphasiques phases, imbibition supports the hydrophilic character of the bentoniteillite clay minerals, whereas the kaolinite was as hydrophobic. Thus, and regarding the reservoir, sandstone reservoirs with the presence of kaolinite are better reservoir
characteristics but hydrphobe. Reservoirs with bentonite clay fraction are less petrophysical characteristics development; even so, it is important to mention that bentonite is hydrophilic type.
The overall results reveal that sandstone with illite clay fraction is the better concerned with permeability and porosity development or preservation leading to efficient fluid circulation and recovery.
