Determinação de tempo de molhamento para rocha calcária

Abstract

Wettability is defined as the tendency of a fluid to adhere or preferably spread over a solid surface in the presence of another immiscible phase. In a reservoir, the solid surface is the rock and the fluids are water, oil and gas. The phase that preferentially "wets" the surface is called wetting phase. Wettability plays a fundamental role in immiscible displacement at the pore level, and depending on whether the rock is wettable to oil or water, miscible methods can be applied to increase oil recovery with the use of surfactants, altering the wettability of the rock – important for carbonate rocks – which are generally oil-wettable. The wetting time is one of the methods used to measure the wettability of solids. This work aims to propose a methodology for determining the wetting time for carbonate rock. For this purpose, three scientific papers that used the wetting time method were studied as a complementary analysis for the study of the wettability of solids. In the bibliographic survey carried out via Science Direct, no studies were found to obtain the wetting time in rocks. The articles evaluated in this work dealt with the wetting time for coal dust. Based on the analysis of those papers, it was possible to develop a methodology to quantify the wetting time of carbonate rock.